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  Subjects -> ENGINEERING (Total: 2258 journals)
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CHEMICAL ENGINEERING (190 journals)                     

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AATCC Journal of Research     Full-text available via subscription   (Followers: 3)
ACS Sustainable Chemistry & Engineering     Hybrid Journal  
Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials     Hybrid Journal   (Followers: 4)
Acta Polymerica     Hybrid Journal   (Followers: 7)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 6)
Advanced Chemical Engineering Research     Open Access   (Followers: 27)
Advanced Powder Technology     Hybrid Journal   (Followers: 12)
Advances in Applied Ceramics     Hybrid Journal   (Followers: 4)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 23)
Advances in Chemical Engineering and Science     Open Access   (Followers: 50)
Advances in Polymer Technology     Hybrid Journal   (Followers: 12)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 6)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 9)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 9)
Anti-Corrosion Methods and Materials     Hybrid Journal   (Followers: 6)
Applied Petrochemical Research     Open Access   (Followers: 2)
Asia-Pacific Journal of Chemical Engineering     Hybrid Journal   (Followers: 7)
Biochemical Engineering Journal     Hybrid Journal   (Followers: 13)
Biofuel Research Journal     Open Access   (Followers: 3)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 11)
Brazilian Journal of Chemical Engineering     Open Access   (Followers: 3)
Bulletin of Chemical Reaction Engineering & Catalysis     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 3)
Carbohydrate Polymers     Hybrid Journal   (Followers: 7)
Catalysts     Open Access   (Followers: 6)
ChemBioEng Reviews     Full-text available via subscription  
Chemical and Engineering News     Free   (Followers: 11)
Chemical and Materials Engineering     Open Access   (Followers: 6)
Chemical and Petroleum Engineering     Hybrid Journal   (Followers: 10)
Chemical and Process Engineering     Open Access   (Followers: 19)
Chemical and Process Engineering Research     Open Access   (Followers: 17)
Chemical Engineering & Technology     Hybrid Journal   (Followers: 32)
Chemical Engineering and Processing: Process Intensification     Hybrid Journal   (Followers: 17)
Chemical Engineering and Science     Open Access   (Followers: 13)
Chemical Engineering Communications     Hybrid Journal   (Followers: 11)
Chemical Engineering Journal     Hybrid Journal   (Followers: 26)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 20)
Chemical Engineering Research Bulletin     Open Access   (Followers: 8)
Chemical Engineering Science     Hybrid Journal   (Followers: 19)
Chemical Geology     Hybrid Journal   (Followers: 14)
Chemical Papers     Hybrid Journal   (Followers: 2)
Chemical Product and Process Modeling     Hybrid Journal   (Followers: 3)
Chemical Reviews     Full-text available via subscription   (Followers: 122)
Chemical Society Reviews     Full-text available via subscription   (Followers: 39)
Chemical Technology     Open Access   (Followers: 11)
ChemInform     Hybrid Journal   (Followers: 4)
Chemistry & Industry     Hybrid Journal   (Followers: 2)
Chemistry Central Journal     Open Access   (Followers: 5)
Chemistry of Materials     Full-text available via subscription   (Followers: 138)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
ChemSusChem     Hybrid Journal   (Followers: 5)
Chinese Chemical Letters     Full-text available via subscription   (Followers: 3)
Chinese Journal of Chemical Engineering     Full-text available via subscription   (Followers: 3)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
Coke and Chemistry     Hybrid Journal   (Followers: 1)
Coloration Technology     Hybrid Journal  
Computational Biology and Chemistry     Hybrid Journal   (Followers: 9)
Computer Aided Chemical Engineering     Full-text available via subscription   (Followers: 1)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 9)
CORROSION     Full-text available via subscription   (Followers: 19)
Corrosion Engineering, Science and Technology     Hybrid Journal   (Followers: 35)
Corrosion Reviews     Hybrid Journal   (Followers: 3)
Crystal Research and Technology     Hybrid Journal   (Followers: 5)
Current Opinion in Chemical Engineering     Open Access   (Followers: 6)
Education for Chemical Engineers     Hybrid Journal   (Followers: 4)
Eksergi     Open Access  
Emerging Trends in Chemical Engineering     Full-text available via subscription  
European Polymer Journal     Hybrid Journal   (Followers: 40)
Fibers and Polymers     Full-text available via subscription   (Followers: 4)
Fluorescent Materials     Open Access   (Followers: 1)
Focusing on Modern Food Industry     Open Access   (Followers: 2)
Frontiers of Chemical Science and Engineering     Hybrid Journal   (Followers: 1)
Gels     Open Access  
Geochemistry International     Hybrid Journal   (Followers: 2)
Handbook of Powder Technology     Full-text available via subscription   (Followers: 3)
Heat Exchangers     Open Access   (Followers: 1)
High Performance Polymers     Hybrid Journal  
Hungarian Journal of Industry and Chemistry     Open Access  
Indian Chemical Engineer     Hybrid Journal   (Followers: 5)
Indian Journal of Chemical Technology (IJCT)     Open Access   (Followers: 9)
Indonesian Journal of Chemical Science     Open Access  
Industrial & Engineering Chemistry     Full-text available via subscription   (Followers: 9)
Industrial & Engineering Chemistry Research     Full-text available via subscription   (Followers: 20)
Industrial Chemistry Library     Full-text available via subscription   (Followers: 3)
Industrial Gases     Open Access  
Info Chimie Magazine     Full-text available via subscription   (Followers: 3)
International Journal of Chemical and Petroleum Sciences     Open Access   (Followers: 2)
International Journal of Chemical Engineering     Open Access   (Followers: 6)
International Journal of Chemical Reactor Engineering     Hybrid Journal   (Followers: 2)
International Journal of Chemical Technology     Open Access   (Followers: 5)
International Journal of Chemoinformatics and Chemical Engineering     Full-text available via subscription   (Followers: 2)
International Journal of Food Science     Open Access   (Followers: 3)
International Journal of Industrial Chemistry     Open Access  
International Journal of Polymeric Materials     Hybrid Journal   (Followers: 5)
International Journal of Science and Engineering     Open Access   (Followers: 4)
International Journal of Waste Resources     Open Access   (Followers: 3)
Journal of Chemical Engineering & Process Technology     Open Access   (Followers: 4)
Journal of Applied Crystallography     Hybrid Journal   (Followers: 5)
Journal of Applied Electrochemistry     Hybrid Journal   (Followers: 10)
Journal of Applied Polymer Science     Hybrid Journal   (Followers: 102)
Journal of Biomaterials Science, Polymer Edition     Hybrid Journal   (Followers: 9)
Journal of Bioprocess Engineering and Biorefinery     Full-text available via subscription  
Journal of Chemical & Engineering Data     Full-text available via subscription   (Followers: 10)
Journal of Chemical and Biological Interfaces     Full-text available via subscription   (Followers: 1)
Journal of Chemical Ecology     Hybrid Journal   (Followers: 6)
Journal of Chemical Engineering     Open Access   (Followers: 13)
Journal of Chemical Engineering and Materials Science     Open Access   (Followers: 2)
Journal of Chemical Science and Technology     Open Access   (Followers: 4)
Journal of Chemical Sciences     Partially Free   (Followers: 17)
Journal of Chemical Technology & Biotechnology     Hybrid Journal   (Followers: 10)
Journal of Chemical Theory and Computation     Full-text available via subscription   (Followers: 15)
Journal of CO2 Utilization     Hybrid Journal   (Followers: 2)
Journal of Coatings     Open Access   (Followers: 4)
Journal of Crystallization Process and Technology     Open Access   (Followers: 7)
Journal of Environmental Chemical Engineering     Hybrid Journal   (Followers: 3)
Journal of Food Measurement and Characterization     Hybrid Journal  
Journal of Food Processing & Technology     Open Access  
Journal of Fuel Chemistry and Technology     Full-text available via subscription   (Followers: 4)
Journal of Fuels     Open Access  
Journal of Geochemical Exploration     Hybrid Journal  
Journal of Industrial and Engineering Chemistry     Hybrid Journal   (Followers: 1)
Journal of Information Display     Hybrid Journal  
Journal of Inorganic and Organometallic Polymers and Materials     Partially Free   (Followers: 6)
Journal of Modern Chemistry & Chemical Technology     Full-text available via subscription   (Followers: 2)
Journal of Molecular Catalysis A: Chemical     Hybrid Journal   (Followers: 5)
Journal of Non-Crystalline Solids     Hybrid Journal   (Followers: 7)
Journal of Organic Semiconductors     Open Access   (Followers: 4)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 5)
Journal of Polymer and Biopolymer Physics Chemistry     Open Access   (Followers: 4)
Journal of Polymer Engineering     Hybrid Journal   (Followers: 8)
Journal of Polymer Research     Hybrid Journal   (Followers: 6)
Journal of Polymer Science Part C : Polymer Letters     Hybrid Journal   (Followers: 5)
Journal of Polymers     Open Access   (Followers: 2)
Journal of Polymers and the Environment     Hybrid Journal   (Followers: 1)
Journal of Powder Technology     Open Access   (Followers: 1)
Journal of Pure and Applied Chemistry Research     Open Access   (Followers: 1)
Journal of the American Chemical Society     Full-text available via subscription   (Followers: 234)
Journal of the Bangladesh Chemical Society     Open Access  
Journal of the Brazilian Chemical Society     Open Access   (Followers: 2)
Journal of The Institution of Engineers (India) : Series E     Hybrid Journal   (Followers: 1)
Journal of the Pakistan Institute of Chemical Engineers     Open Access   (Followers: 1)
Journal of the Taiwan Institute of Chemical Engineers     Hybrid Journal   (Followers: 2)
Journal of Water Chemistry and Technology     Hybrid Journal   (Followers: 8)
Jurnal Bahan Alam Terbarukan     Open Access  
Jurnal Inovasi Pendidikan Kimia     Open Access  
Jurnal Reaktor     Open Access  
Jurnal Teknologi Dan Industri Pangan     Open Access   (Followers: 1)
Korean Journal of Chemical Engineering     Hybrid Journal   (Followers: 3)
Main Group Metal Chemistry     Hybrid Journal   (Followers: 1)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 14)
Materials Science and Applied Chemistry     Open Access  
Materials Sciences and Applied Chemistry     Full-text available via subscription  
Molecular Imprinting     Open Access  
MRS Communications     Hybrid Journal  
Nanocontainers     Open Access  
Nanofabrication     Open Access  
Noise Control Engineering Journal     Full-text available via subscription   (Followers: 2)
Ochrona Srodowiska i Zasobów Naturalnych : Environmental Protection and Natural Resources     Open Access  
Petroleum Chemistry     Hybrid Journal   (Followers: 1)
Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B     Full-text available via subscription   (Followers: 3)
Plasma Processes and Polymers     Hybrid Journal  
Plasmas and Polymers     Hybrid Journal  
Polymer     Hybrid Journal   (Followers: 94)
Polymer Bulletin     Hybrid Journal   (Followers: 7)
Polymer Composites     Hybrid Journal   (Followers: 13)
Powder Technology     Hybrid Journal   (Followers: 12)
Recyclable Catalysis     Open Access   (Followers: 1)
Research on Chemical Intermediates     Hybrid Journal  
Reviews in Chemical Engineering     Hybrid Journal   (Followers: 5)
Revista Cubana de Química     Open Access  
Revista ION     Open Access  
Revista Mexicana de Ingeniería Química     Open Access  
Rubber Chemistry and Technology     Full-text available via subscription   (Followers: 2)
Russian Chemical Bulletin     Hybrid Journal   (Followers: 2)
Russian Journal of Applied Chemistry     Hybrid Journal   (Followers: 1)
Science and Engineering of Composite Materials     Hybrid Journal   (Followers: 56)
Solid Fuel Chemistry     Hybrid Journal  
South African Journal of Chemical Engineering     Open Access   (Followers: 2)
South African Journal of Chemistry     Open Access   (Followers: 2)
Surface Engineering and Applied Electrochemistry     Hybrid Journal   (Followers: 5)
Sustainable Chemical Processes     Open Access   (Followers: 2)
Synthesis Lectures on Chemical Engineering and Biochemical Engineering     Full-text available via subscription  
The Canadian Journal of Chemical Engineering     Hybrid Journal   (Followers: 3)
The Chemical Record     Hybrid Journal   (Followers: 1)
Theoretical Foundations of Chemical Engineering     Hybrid Journal   (Followers: 2)
Transition Metal Chemistry     Hybrid Journal   (Followers: 2)
Transylvanian Review of Systematical and Ecological Research     Open Access  
Visegrad Journal on Bioeconomy and Sustainable Development     Open Access   (Followers: 1)
Zeitschrift für Naturforschung B : A Journal of Chemical Sciences     Open Access   (Followers: 1)

           

Journal Cover High Performance Polymers
  [SJR: 0.374]   [H-I: 29]   [0 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0954-0083 - ISSN (Online) 1361-6412
   Published by Sage Publications Homepage  [850 journals]
  • Sulfonated copoly(arylene ether nitriles) as proton exchange membrane with
           excellent mechanical and thermal properties
    • Authors: Zheng, P; Feng, M, Jia, K, Liu, X.
      Pages: 633 - 640
      Abstract: A series of sulfonated biphenol poly(arylene ether nitriles) (BP-SPEN) copolymers were synthesized by the nucleophilic aromatic substitution polymerization of 2,6-difluorobenzonitrile with different ratios of hydroquinonesulfonic acid potassium salt and biphenol in the presence of potassium carbonate. The composition and structures of the BP-SPEN copolymers were characterized by Fourier transform infrared spectroscopy. Thermal properties, mechanical properties, proton conductivity, and water uptake of copolymer membranes were also investigated. The results showed that they present high glass transition temperature ranging from 131°C to 180°C and good thermal stability with the 5% weight loss temperatures in the range of 284–287°C under nitrogen atmosphere. They also exhibited good mechanical property with the tensile strength in the range of 68–109 MPa in the dry state and 31–72 MPa in the wet state. Furthermore, these copolymer membranes exhibited good water uptake ranging from 8.8% to 39.9%. Thus, the membranes had good proton conductivities in the range of 1.09 x 10–5–1.54 x 10–3 S cm–1 at room temperature and 100% relative humidity. The influence of temperature on water uptakes, tensile strength, and proton conductivity was also investigated.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315591195
      Issue No: Vol. 28, No. 6 (2016)
       
  • Effect of air dielectric barrier discharge plasma treatment on the
           adhesion property of sanded polyphenylene sulfide
    • Authors: Hong, R; Xu, D, Wang, X, Long, S, Zhang, G, Yang, J.
      Pages: 641 - 650
      Abstract: Air dielectric barrier discharge (DBD) plasma was employed to treat the sanded polyphenylene sulfide (PPS) surface. The plasma-treated PPS samples were bonded with epoxy adhesive, and the adhesion strength was measured by the single lap-joint specimen test. Scanning electron microscopy (SEM), water contact angle analysis, and X-ray photoelectron spectroscopy (XPS) were applied to investigate the effect of the plasma treatment on the PPS surface property. A slight etching trace was detected after the plasma treatment according to the SEM images. XPS and water contact angle analysis indicated that the plasma treatment introduced sulfide oxides (S=O and O=S=O) onto the PPS surface leading to a higher surface energy. A steady improvement of bonding shear strength was achieved with the increase of plasma treatment time or discharge power density, which was consistent with the failure mode study. According to the above analysis, the air DBD plasma treatment could effectively improve the adhesion property of PPS.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315593159
      Issue No: Vol. 28, No. 6 (2016)
       
  • Indium(III) phthalocyanine eka-conjugated polymer as high-performance
           optical limiter upon nanosecond laser irradiation
    • Authors: Darwish, W. M; Darwish, A. M, Al-Ashkar, E. A.
      Pages: 651 - 659
      Abstract: A novel chloroindium(III) phthalocyanine network polymer (4) was prepared and characterized by energy dispersive X-ray spectrometry, proton nuclear magnetic resonance, Fourier transform infrared spectroscopy, thermal gravimetric analysis (TGA) and absorption and emission spectroscopies. The non-linear optical (NLO) profile of the prepared phthalocyanine (Pc) network polymer, derived from a nanosecond open-aperture Z-scan technique at 532 nm, shows a clear reverse saturable absorption and a high non-linear absorption coefficient (α 2) of 9.7 x 10–7 cm W–1. Optical limiting investigations indicated that the prepared Pc network polymer has a relatively low limiting threshold of 900 mJ cm–2. According to these results, the prepared Pc polymer is a promising material for many NLO applications.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315593616
      Issue No: Vol. 28, No. 6 (2016)
       
  • Poly(ether-imide)s with flexible linkages and kinks: Synthesis,
           processability, thermal stability, and dielectric studies
    • Authors: Thiruvasagam, P; Saritha, B, Hari, N.
      Pages: 660 - 668
      Abstract: Four new aromatic diimide–diol monomers were synthesized from bisphenol A dianhydride and hydroxyamines. The poly(ether–imide)s (PEI-1 to PEI-4) were synthesized from these diols and 4,4'-difluorobenzophenone-IV via carbonyl-activated aromatic nucleophilic fluoro displacement reaction. The chemical structures of the monomers and PEIs were confirmed by Fourier transform infrared spectrometer and proton nuclear magnetic resonance spectroscopies. The PEIs synthesized here were amorphous and soluble in polar aprotic solvents and low-boiling organic solvents. The PEIs had good thermal stability, 10% weight loss occurred in the temperatures range of 400–448°C, and char yields at 800°C under nitrogen atmosphere was in the range of 14–22%. The limiting oxygen index values of PEIs were in the range of 23.1–26.3, and such PEIs can be used as self-extinguishing polymers. The dielectric constants of the PEIs were in the range of 3.30–4.00, and such PEIs can be used as electrical insulation materials for systems operating at high temperature for long time.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315593617
      Issue No: Vol. 28, No. 6 (2016)
       
  • Optimization and preparation of an allyl phenoxy-modified bismaleimide
           resin
    • Authors: Jiang, H; Wang, R, Farhan, S, Wang, M, Zheng, S.
      Pages: 669 - 681
      Abstract: A thermosetting resin system has been developed by the copolymerization of allyl phenoxy, bismaleimide (BMI), and diallyl bisphenol A and optimized using response surface methodology. An optimized modified resin system with enhanced properties was achieved based on empirical second-order models expressing the relationship between the modifier contents and the mechanical properties. Dicumyl peroxide (DCP) was selected as initiator to further improve the curing behavior and mechanical properties of the optimized resin system. The effect of initiator contents on impact, flexural strength, and heat distortion temperature was also investigated. The curing behavior, morphology, and thermal stability of the optimized resin were carefully characterized using differential scanning calorimeter, scanning electron microscope, and thermogravimetric and dynamic mechanical analyzers, respectively. For evaluating the efficiency of modified BMI resin system, laminated composites using glass fiber cloth were fabricated using a hot press and tested for mechanical properties. The results showed that the DCP reduced the curing temperature significantly, improved the curing process, and proved to be very effective in heat resistance. Meanwhile, the laminated composite with initiator showed 13–27% higher mechanical properties and 5–7% higher retention rate at high temperature when compared with the neat resin composite system. The optimized resin system with higher mechanical properties, good heat resistance, and better manufacturability can be used as matrix resin for making advanced fiber-reinforced composites.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315593618
      Issue No: Vol. 28, No. 6 (2016)
       
  • Synthesis and characterization of phenylethynyl-terminated
           polyimide/carboxylated multiwalled carbon nanotube composite film
    • Authors: Du, J; Zhou, M.-M, Ma, L.-L, Cao, F, Xiao, J. J.
      Pages: 682 - 688
      Abstract: Phenylethynyl-terminated polyimide (PI)/carboxylated multiwalled carbon nanotube (MWCNT) composite films were synthesized from 4,4'-oxydianiline, carboxylated MWCNTs, and 3,3',4,4'-biphenyl tetracarboxylic dianhydride and capped by 4-phenylethynylphthalic anhydride through in situ polymerization under sonication. The results of scanning electron microscopy indicated that the carboxylated MWCNTs were uniformly dispersed in the phenylethynyl-terminated PI matrix. Thermal gravimetric analysis indicated that the initial thermal decomposition temperatures of the films were up to 500°C, and the addition of carboxylic MWCNT have advantage of thermal properties of the phenylethynyl-terminated PI. The dynamic mechanical thermal analysis results clearly indicated that the glass transition temperature increases with increasing carboxylated MWCNT content. In addition, the mechanical properties of the composite films were improved by the carboxylated MWCNTs. The electrical properties were greatly enhanced due to the good conductivity of the carboxylated MWCNTs.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315593619
      Issue No: Vol. 28, No. 6 (2016)
       
  • Preparation and optical properties of poly(arylene ether ketone)
           nanocomposites containing cadmium sulfide nanoparticles
    • Authors: Hu, X; Du, J, Mu, Y, Hu, C, Zhang, S, Jiang, Z.
      Pages: 689 - 696
      Abstract: Polymer nanocomposites are usually synthesized by incorporating dried nanoparticles into polymer matrices. This method often leads to aggregation of nanoparticles. In this study, a series of novel poly(arylene ether ketone) (PAEK) nanocomposites containing cadmium sulfide (CdS) nanoparticles were prepared by hydrothermal method with carboxylic-functionalized PAEK (ACA-PAEK) as ligand. The optical characterization of the nanocomposites were carried out using ultraviolet (UV)–visible absorption and photoluminescence spectroscopies, the morphological properties using transmission electron microscopy, and the thermal properties had using differential scanning calorimetry and thermogravimetric analysis. The analyses had shown that CdS quantum dots with diameter of about 4 nm could be synthesized by such route, and the nanocomposites exhibited not only good light emission in the UV range but also excellent heat resistance. In general, a new CdS/ACA-PAEK nanohybrid was synthesized without ligand exchange and had good optical properties and excellent heat resistance.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315594028
      Issue No: Vol. 28, No. 6 (2016)
       
  • Morphological, structural, and thermophysical properties of zirconium
           dioxide-epoxy nanocomposites
    • Authors: Halder, S; Goyat, M, Ghosh, P.
      Pages: 697 - 708
      Abstract: Critical examinations were made to understand the thermophysical behavior of zirconium dioxide (ZrO2)–epoxy nanocomposite using differential thermal analysis/thermogravimetric analysis studies. ZrO2 nanoparticles in the size range of 20–30 nm were used as fillers. Ultrasonic dual mode mixing (UDMM) at two different amplitudes of 40% and 55% was employed to produce ZrO2-epoxy nanocomposites. Dispersion of less clustered ZrO2 nanoparticles in epoxy matrix demonstrates the importance of high amplitude of UDMM. Thermal degradation reaction kinetics of the nanocomposite was determined using Coats–Redfern and integral method of Horowitz and Metzger. Processing by the UDMM route at high amplitude not only significantly increases the glass transition temperature but also noticeably enhances the thermal stability of the nanocomposite. Improvement in thermal stability is attributed to the good dispersion of nanoparticles in epoxy matrix and formation of a large interface between epoxy matrix and nanoparticles. Fourier transform infrared spectroscopy was used to understand the molecular structure of base matrix as well as nanocomposite.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315595275
      Issue No: Vol. 28, No. 6 (2016)
       
  • Influence of terminating triamine by phthalic anhydride on polyimides
           properties
    • Authors: Zhuo, L; Kou, K, Bai, Y, Chao, M, Wang, Y.
      Pages: 709 - 716
      Abstract: In this study, hyperbranched polyimides were prepared from 2,6-bis(4-aminophenyl)-4-(4-(4-aminophenoxy)phenyl)pyridine (BAAP) and commercial dianhydrides by strictly controlling the reaction conditions. Polyimides with phthalimide pendants were also prepared to study the influence mechanisms of terminating BAAP by phthalic anhydride (PA) on polyimides’ properties. Fourier transform infrared and proton nuclear magnetic resonance spectroscopies were utilized to observe the chemical structures of the hyperbranched polyimides. The influence of terminating BAAP by PA on polyimides’ properties was studied by comparing the two series of polyimides. All the polyimide samples held completely amorphous structures and possessed excellent solubility and thermal stability. Terminating BAAP by PA decreased the d-spacing values of the obtained polyimides and slightly weakened their solubility and thermal stability.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315595276
      Issue No: Vol. 28, No. 6 (2016)
       
  • Synthesis and optical and electrical properties of self-doped copolymers
           
    • Authors: Yamaguchi, I; Yamonoue, H.
      Pages: 717 - 723
      Abstract: Polymerization of aniline with 3,4-ethylenedioxythiophene (EDOT) in several molar ratios using ammonium persulfate yielded copolymers consisting of p-aminophenylene (unit A) and 3,4-ethylenedioxythiophene-2,5-diyl (unit B). The content of units A and B in the copolymers depended on the monomer feed ratio. Treatment of the copolymers with sodium hydride deprotonated the NH groups to give polyanions. Subsequent treatment of these polyanions with 1,3-propanesultone yielded copolymers with sodium N-propylsulfonate side groups, which were converted into N-propylsulfonic acid moieties by treatment with diluted hydrochloric acid. The copolymers exhibited absorption peaks at approximately 330 and 650 nm, which can be ascribed, respectively, to the benzenoid –* and quinoid n–* transitions of unit A. The copolymers were subjected to electrochemical oxidation, which was dependent on the contents of units A and B. The electrical conductivity of copolymers with N-propylsulfonic acid side chains was found to be higher than that of copolymers bearing sodium N-propylsulfonate groups.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315595446
      Issue No: Vol. 28, No. 6 (2016)
       
  • Effect of polyhedral oligomeric silsesquioxane nanoreinforcement on the
           properties of epoxy resin/monoglycidylether-terminated
           poly(dimethylsiloxane) nanocomposites
    • Authors: Florea, N. M; Lungu, A, Balanuca, B, Badica, P, Craciun, L, Damian, C. M, Enculescu, M, Ionescu, C, Tihan, G, Iovu, H.
      Pages: 724 - 734
      Abstract: This article reports the synthesis and characterization of several types of organic–inorganic nanocomposites based on epoxy resin/monoglycidylether-terminated poly(dimethylsiloxane) reinforced with 2, 5, or 10 wt% polyhedral oligomeric silsesquioxanes (POSS) bearing one glycidyl (1GE-POSS) or eight glycidyl(8GE-POSS) groups. The morphological features of the studied samples were established through atomic force microscopy, contact angle measurements, X-ray photoelectron spectroscopy, and scanning electron microscopy/energy-dispersive X-ray spectroscopy, and it was demonstrated that 8GE-POSS is well dispersed within the polymer matrix, while 1GE-POSS exhibits a high tendency to form aggregates. Differential scanning calorimetry (DSC) and Fourier transform infrared resonance (FTIR) measurements are used to follow the curing behavior and to study the polymerization kinetics of epoxy groups. As evidenced by DSC and FTIR results, the inclusion of 8GE-POSS within the polymer matrix leads to a lower epoxy polymerization rate of the resulted nanocomposites than those reinforced with 1GE-POSS. The dynamic mechanical analysis results revealed that the thermomechanical properties are gradually improved with increasing of 8GE-POSS content due to the higher cross-linking density.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315595447
      Issue No: Vol. 28, No. 6 (2016)
       
  • Sulfonated poly(ether ether ketone)/poly(vinylidene
           fluoride)/tungstophosphoric acid membrane for vanadium redox flow battery
           application
    • Authors: Zhang, Y; Chen, J, Zhang, J, Wang, G, Zhang, J, Zhu, X, Wang, R.
      Pages: 735 - 740
      Abstract: A blend membrane consisting of sulfonated poly(ether ether ketone), poly(vinylidene fluoride), and tungstophosphoric acid (denoted as SPEEK/PVDF/TPA membrane) has been fabricated and firstly used as ion exchange membrane for vanadium (V) redox flow battery (VRB) application. This composite membrane is characterized by physical and electrochemical methods. The results show that the SPEEK/PVDF/TPA membrane possesses significantly high ion selectivity and low permeability of V(IV) compared with the Nafion 117 membrane. Also VRB single cells with SPEEK/PVDF/TPA membrane show significantly lower capacity loss, higher coulombic efficiency (CE > 93%) and higher energy efficiency (EE > 80%) than that with Nafion 117 membrane. In the self-discharge test, the cells with the SPEEK/PVDF/TPA membrane show better durability. With all the good properties and low cost, the SPEEK/PVDF/TPA membrane shows promising prospects for application in VRB.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315596587
      Issue No: Vol. 28, No. 6 (2016)
       
  • Preparation and properties of a composite made by barium
           sulfate-containing polytetrafluoroethylene granular powder
    • Authors: Yan, L; Huang, R, Xiao, J, Xia, H, Chao, M, Wiessner, S.
      Pages: 741 - 746
      Abstract: Barium sulfate (BaSO4)-containing polytetrafluoroethylene (PTFE) granular powder was prepared through a two-phase emulsion dispersion granulation method. Because of its large bulk density, small average particle size, narrow particle size distribution, and superior powder flowability, the granular powder is suitable for use in automatic molding machines. The effects of granulation on the tensile strength of the BaSO4/PTFE composite were investigated, and the composite’s microstructures were characterized and analyzed using scanning electron microscopy. All these indicated that the granulation could make BaSO4 disperse more homogeneously in PTFE and reduce many defects in molded articles. So the properties of the BaSO4/PTFE composites made by the granular powder were superior to the composite obtained from the nongranular powder. The tensile strength and elongation of the composite obtained from the granular powder could be achieved to a level of 19.4 MPa and 420%, respectively.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008315597051
      Issue No: Vol. 28, No. 6 (2016)
       
  • Graphene as a nanotemplating auxiliary on the polypyrrole pigment for
           anticorrosion coatings
    • Authors: Jiang, S; Liu, Z, Jiang, D, Cheng, H, Han, J, Han, S.
      Pages: 747 - 757
      Abstract: In this article, we report on the exceptional application of polypyrrole/graphene composites (Ppy/G) for the corrosion protection of steel. Well-dispersed Ppy/G composites were successfully prepared using in situ solution polymerization. The prepared nanocomposites exhibited superior anticorrosion properties compared with the bare and epoxy, in which the corrosion protection efficiency increased 50–100 times with the Ppy(97)@G(3) pigment. The rheological and dielectric properties of the nanocomposites were superior to those of pure Ppy/epoxy. Ppy(97)@G(3) increased the thermal curing temperature from approximately 100°C to 110°C and considerably decreased the volume resistivity. The substantially improved properties of the nanocomposites were attributed to their high dispersions, which greatly enhanced the corrosion factors and barrier properties.
      PubDate: 2016-08-02T04:43:44-07:00
      DOI: 10.1177/0954008316647469
      Issue No: Vol. 28, No. 6 (2016)
       
 
 
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