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CHEMICAL ENGINEERING (188 journals)                     

Showing 1 - 0 of 0 Journals sorted alphabetically
AATCC Journal of Research     Full-text available via subscription   (Followers: 4)
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: 13)
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: 7)
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: 20)
Chemical and Process Engineering Research     Open Access   (Followers: 18)
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: 12)
Chemical Engineering Journal     Hybrid Journal   (Followers: 27)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 21)
Chemical Engineering Research Bulletin     Open Access   (Followers: 8)
Chemical Engineering Science     Hybrid Journal   (Followers: 20)
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: 128)
Chemical Society Reviews     Full-text available via subscription   (Followers: 39)
Chemical Technology     Open Access   (Followers: 11)
ChemInform     Hybrid Journal   (Followers: 6)
Chemistry & Industry     Hybrid Journal   (Followers: 3)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry of Materials     Full-text available via subscription   (Followers: 148)
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: 7)
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: 41)
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   (Followers: 1)
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: 105)
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: 14)
Journal of CO2 Utilization     Hybrid Journal   (Followers: 2)
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 Geochemical Exploration     Hybrid Journal   (Followers: 1)
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: 7)
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 Pure and Applied Chemistry Research     Open Access   (Followers: 1)
Journal of the American Chemical Society     Full-text available via subscription   (Followers: 249)
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  
Modern Chemistry & Applications     Open Access  
Molecular Imprinting     Open Access  
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: 104)
Polymer Bulletin     Hybrid Journal   (Followers: 7)
Polymer Composites     Hybrid Journal   (Followers: 14)
Polyolefins Journal     Open Access  
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: 58)
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: 0.378]   [H-I: 33]   [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  [852 journals]
  • Biowaste material reinforced cyanate ester based epoxy composites for
           flame retardant applications
    • Authors: Krishnadevi, K; Selvaraj, V.
      Pages: 881 - 894
      Abstract: This article reports the development of halogen-free flame-retardant amine-terminated cyclophosphazene (ATCP) and functionalized rice husk ash (FRHA)-reinforced cyanate ester (CE; 2,2-bis(4-cyanatophenyl)propane)-based epoxy (EP) composite material through the ring formation of cyanurate and imino carbonyl adduct formation. The ATCP/FRHA/CE-EP composites were characterized using Fourier transform infrared spectroscopy, scanning electron microscope, X-ray diffraction analysis and contact angle measurements. A plausible fire-retardant mechanism has been hypothesized based on the analysis of decomposition temperature, char yield, heat release rate, total smoke production, smoke production rate and carbon monoxide production. These results suggest that the ATCP/FRHA/CE-EP composites can be used as hydrophobic, electrical-resistant and improved fire-retardant materials. Hence, ATCP/FRHA/CE-EP flame-retardant system paves new possibility of high-performance non-halogen flame-retardant polymeric materials for electronic and microelectronic applications.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315605554
      Issue No: Vol. 28, No. 8 (2016)
  • Copolymerization of self-catalyzed phthalonitrile with bismaleimide toward
           high-temperature-resistant polymers with improved processability
    • Authors: Jiang, M; Xu, M, Jia, K, Liu, X.
      Pages: 895 - 907
      Abstract: Phthalonitrile and bismaleimide (BMI) have been considered as high-temperature-resistant materials in the fields of heterocyclic chemistry. In this work, a self-catalyzed phthalonitrile-containing benzoxazine group (BA-Ph) was copolymerized with BMI to prepare high-temperature-resistant polymers with enhanced processability. The underlined chemistry was proposed as the addition reactions between phenolic hydroxyl generated by the oxazine ring opening of BA-Ph and unsaturated imide of BMI. Moreover, differential scanning calorimetry, Fourier transform infrared spectroscopy, and dynamic rheological analysis were used to explore the curing behaviors, structure transition, and processability of the blends. Results indicated that the electrophilic addition reaction between phenolic hydroxyl and BMI was triggered initially, followed by the ring-forming polymerization of nitrile groups catalyzed by the remaining hydroxyl group; the proposed reaction mechanism was verified by using a model compound. Furthermore, the polymerization rate of blends can be well controlled by the relative molar ratio of BA-Ph/BMI, temperature, and time according to the rheological results. Meanwhile, the thermogravimetric analysis showed that all BA-Ph/BMI polymers exhibited good thermal stability (T5% > 400°C). What is more, mechanical and dielectric properties of BA-Ph/BMI/glass fiber composite laminates were studied indicating that the polymerization of nitrile groups may contribute to the increase in the degree of cross-linking.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315606955
      Issue No: Vol. 28, No. 8 (2016)
  • Preparation and characterization of high dielectric calcium copper
           titanate/polyimide composite films
    • Authors: Du, J; Zhou, M. M, Ma, L. L, Cao, F, Xiao, J. J, Yu, Z. P, Qiu, X. L, Wang, M. M.
      Pages: 908 - 914
      Abstract: Calcium copper titanate (CaCu3Ti4O12; CCTO)/polyimide (PI) composite films were synthesized by 4,4'-oxydianiline, CCTO, and 3,3',4,4'-biphenyltetracarboxylic dianhydride through ultrasonic dispersion in situ polymerization. Scanning electron microscopic images clearly confirmed that 10 wt% CCTO particles dispersed uniformly in composite films. When the content was 20–80 wt%, CCTO particles were coated by PI in good condition, and globular particles dispersed in the composite films. PI and CCTO/PI were found to exhibit excellent thermal stability. The addition of CCTO has influence on the thermal properties of PI. Weight loss temperatures (5% and 10%) of the composite films containing 70 wt% CCTO reached 612°C and 673.9°C, respectively. The strong interfacial interaction between PI and CCTO improved the dielectric properties of the composite films. The dielectric permittivity and conductivity of the CCTO/PI composite films increase with the increase of CCTO content. In addition, the dielectric permittivity of films containing 40–70 wt% increased rapidly.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315609971
      Issue No: Vol. 28, No. 8 (2016)
  • Changes induced in the properties of dielectric silicone elastomers by the
           incorporation of transition metal complexes
    • Authors: Stiubianu, G; Dumitriu, A.-M. C, Varganici, C.-D, Tugui, C, Iacob, M, Bele, A, Cazacu, M.
      Pages: 915 - 926
      Abstract: Three new, cheap, and easily obtained complexes of triethanolamine with Cu(II), Ni(II), and Co(II) were incorporated in a high-molecular-weight polydimethylsiloxane-α,-diol (number-average molecular weight = 440,000 g mol–1) together with silica nanoparticles. While silica has a well-known mechanical reinforcing role, adding the metal complexes with high dielectric permittivity aims to increase values for this characteristic of the prepared silicone composites in order to be useful for electromechanical applications. A simple procedure was employed for the incorporation of fillers by mechanical mixing in bulk without a solvent. The composites were processed as films and stabilized by curing initiated with 2,4-dichlorobenzoyl peroxide at high temperature (180°C) and pressure. The cross-linking yield was estimated on the basis of swelling in chloroform, while the cross-linking density was calculated from differential scanning calorimetry traces. The filler’s effect on mechanical and dielectric properties was assessed by appropriate measurements (tensile testing and dielectric spectroscopy). Changes in dielectric behavior as a result of the repeated deformation by stretching were also highlighted. Electromechanical sensitivity and ultimate tensile toughness values were estimated on the basis of these results as primary indices on suitability of these materials in transducers. The dielectric strength of the composite films was also evaluated by electrical breakdown field measurements.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315610393
      Issue No: Vol. 28, No. 8 (2016)
  • Phenylethynyl-terminated imide oligomers derived from thioetherdiphthalic
           anhydride isomers with decreased melt viscosities
    • Authors: Sun, L; Wang, W, Xu, L, Chen, G, Fang, X.
      Pages: 927 - 935
      Abstract: A series of oligomers based on the mixture of thioetherdiphthalic anhydride isomers and 4,4'-oxydianiline with 4-phenylethynylphthalic anhydride as reactive endcapping reagent were prepared. The calculated molecular weights were in the range of 1150–5070 g mol–1 with different degrees of polymerization (n = 1, 3, 5, 7, and 9). The effect of molecular weight of the aromatic oligomers on their processability and solubility as well as the thermal and mechanical properties of the thermal-cured polyimides (PIs) was systematically investigated. The typical oligomer (Oligo-1) could be melted at temperatures of 289–334°C to yield stable molten fluid with melt viscosity below 1.0 Pa s. The melt viscosity of the oligomers increased with the increasing molecular weight. After thermally curing at 370°C, the thermoset PIs exhibited good thermal properties. The glass transition temperatures of oligomers measured by differential scanning calorimetry were in the range of 286–326°C, and the temperature of 5% weight loss was higher than 524°C. The cured films also showed good mechanical properties with tensile strength above 72 MPa and modulus more than 2.5 GPa.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315610394
      Issue No: Vol. 28, No. 8 (2016)
  • Improved solubilization of multiwalled carbon nanotubes (MWCNTs) in water
           by surface functionalization with D-glucose and D-fructose: Properties
           comparison of functionalized MWCNTs/alanine-based poly(amide-imide)
    • Authors: Mallakpour, S; Behranvand, V.
      Pages: 936 - 944
      Abstract: Carbon nanotubes (CNTs) are difficult to be dispersed into a polymer matrix. For effective reinforcement, the strong interfacial interaction between nanotubes and the matrix is essential to donate the efficient thermal transfer from the matrix to nanotubes. In this study, multiwalled carbon nanotubes (MWCNTs) were modified with glucose and fructose carbohydrates as biomolecules to obtain Gl-MWCNTs and Fr-MWCNTs. Good water solubilization of MWCNTs was obtained, and these hybrids were expected to be biocompatible. Functionalized MWCNTs were incorporated into a poly(amide–imide) (PAI) matrix-containing alanine through a simple ultrasonication-assisted solution blending procedure. Then, it was tried to compare the obtained nanocomposites morphologically and thermally to study the compatibility between PAI matrix with Gl-MWCNTs and Fr-MWCNTs. Surface morphology observations suggested strong interfacial adhesion between the functionalized MWCNTs and the PAI matrix. This leads to homogeneous distribution of nanotubes throughout the matrix. Significantly better thermal properties of PAI were achieved by introducing Gl-MWCNT into the PAI matrix than that was achieved by similar incorporation of Fr-MWCNTs.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315610395
      Issue No: Vol. 28, No. 8 (2016)
  • Mechanical and thermal properties of a novel bismaleimide matrix resin for
           high-performance composite materials
    • Authors: Xu, D; Yao, Z, Zhou, J.
      Pages: 945 - 952
      Abstract: A novel bismaleimide matrix resin of amino-polythioetherimide (PTEI-N)/4,4'-bismaleimidodiphenyl methane (BDM)/2,2'-diallylbisphenol A (BA) was prepared. Mechanical measurements, dynamic thermomechanical analysis, thermogravimetric analysis (TGA), and microanalyses were conducted to assess the mechanical properties, thermal resistance, and morphology of the modified resin. Results demonstrate that the addition of PTEI-N has significant effects on the mechanical properties of the BDM/BA system. Compared with the pure BDM/BA resin, the PTEI-N/BDM/BA system markedly improves the tensile strength, flexural strength, and impact strength, given an appropriate amount of PTEI-N. Scanning electron microscopic and energy-dispersive spectroscopic results show that PTEI-N is distributed uniformly in the BDM/BA system, and the interfacial compatibility between the PTEI-N and BDM/BA phase is excellent. TGA shows that the BDM/BA resin continues to exhibit good thermal resistance with a suitable dosage of PTEI-N. These changes in properties are closely correlated with the addition of PTEI-N. The PTEI-N/BDM/BA resin system shows potential applications in many fields.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315611468
      Issue No: Vol. 28, No. 8 (2016)
  • Synthesis and properties of cyano group-containing polyimides with high
           peel strength
    • Authors: Cao, X; Song, Y, Matsumoto, T, Liu, B.
      Pages: 953 - 961
      Abstract: In order to investigate the effect of cyano groups (–CN) on the properties of the polymers, two series of polyimides (PIs) based on a –CN-containing diamine monomer and a diamine monomer without –CN group were synthesized and characterized, respectively. After studying the structure–property relationships of these polymers, it was found that some properties could be greatly improved with the incorporation of –CN groups. Firstly, the tensile test showed that the –CN-containing polymeric films had higher tensile strength and Young’s moduli. The tensile strength and the Young’s modulus of 4,4'-(hexafluoroisopropylidene) diphthalic with –CN groups anhydride reached 154.1 MPa and 1.66 GPa, respectively. Secondly, thermogravimetric analysis results revealed that the –CN-containing polymers (CN-PI polymers) had good thermal stability and exhibited no decomposition below 470°C under nitrogen atmosphere. Thirdly, the dielectric constants of the CN-PI polymers were in the range of 3.67–3.84 at 10 MHz, which had an increase of 0.5 in comparison with the corresponding PIs without –CN groups. Fourthly, the CN-PI polymers had higher peel strength to copper foils. The peel strength of 4,4'-biphenyltetracarboxylic dianhydride-containing –CN groups could reach 1.28 N mm–1, suggesting its strong interaction to copper matrix and the potential use in flexibility circuit board. Finally, all the films showed better optical transparency compared with DuPont’s Kapton® film.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315611469
      Issue No: Vol. 28, No. 8 (2016)
  • 2,3,3',4'-Oxydiphthalic dianhydride-based phenylethynyl-terminated imide
           oligomers for low-temperature resin transfer molding applications
    • Authors: Meng, X; Zheng, Y, Yan, J, Li, Y, Wang, Z, Li, G.
      Pages: 962 - 970
      Abstract: A series of imide resins were prepared using 2,3,3',4'-oxydiphthalic dianhydride, 4-phenylethynylphthalic anhydride, and aromatic diamines (1, 3-bis(3-aminophenoxy), 3,4'-oxyaniline, 2,2'-bis (trifluoromethyl) benzidine, and m-phenylenediamine) as starting materials. These imide oligomers were characterized by means of Fourier transform infrared spectroscopy, differential scanning calorimetry, intrinsic viscosity measurements, and rheological measurements. Some of these oligomers exhibited low (2 h at 250°C) melt viscosity, which was highly desirable for resin transfer molding process. Thermosetting polyimides (PIs) were then produced from these oligomers via thermal cross-linking reaction of phenylethynyl group. The properties of the thermosets were studied using tensile and flexural testing, dynamic mechanical thermal analysis, and thermogravimetric analysis. The cured PIs exhibited a good combination of thermal and mechanical properties, with a tensile strength of 31–76 MPa, flexural strength of 38–142 MPa, glass transition temperatures of 233–358°C, and 5% weight loss temperatures of 540–545°C under nitrogen atmosphere.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315611470
      Issue No: Vol. 28, No. 8 (2016)
  • Preparation and characterization of novel polybenzoxazine hybrid materials
    • Authors: Chiu, W.-M; Wang, Y.-X, Tsai, P.-A, Wu, J.-H.
      Pages: 971 - 983
      Abstract: The novel polybenzoxazine hybrid materials were prepared using 6,6'-(9H-fluorene-9,9-diyl)bis(3-allyl-3,4-dihydro-2H-benzo-1,3-oxazine) (VF9Bp), 4,4'-bisphenol silane as raw materials. The chemical structure of the raw materials was confirmed by proton, carbon, and silicon nuclear magnetic resonance and Fourier transform infrared (FTIR) spectroscopies. The structural changes from benzoxazines to their corresponding polybenzoxazines were studied by FTIR. Thermal characterization indicated that the glass transition temperature, thermal stability, and dimensional stability of the novel polybenzoxazine hybrid materials were all superior to those of conventional polybenzoxazine.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315612139
      Issue No: Vol. 28, No. 8 (2016)
  • Controlled variation of monomer sequence distribution in the synthesis of
           aromatic poly(ether ketone)s
    • Authors: Lim, K. J; Cross, P, Mills, P, Colquhoun, H. M.
      Pages: 984 - 992
      Abstract: The effects of varying the alkali metal cation in the high-temperature nucleophilic synthesis of a semi-crystalline, aromatic poly(ether ketone) have been systematically investigated, and striking variations in the sequence distributions and thermal characteristics of the resulting polymers were found. Polycondensation of 4,4'-dihydroxybenzophenone with 1,3-bis(4-fluorobenzoyl)benzene in diphenylsulphone as solvent, in the presence of an alkali metal carbonate M 2CO3 (M = Li, Na, K, or Rb) as base, affords a range of different polymers that vary in the distribution pattern of two-ring and three-ring monomer units along the chain. Lithium carbonate gives an essentially alternating and highly crystalline polymer, but the degree of sequence randomization increases progressively as the alkali metal series is descended, with rubidium carbonate giving a fully random and non-thermally crystallizable polymer. Randomization during polycondensation is shown to result from reversible cleavage of the ether linkages in the polymer by fluoride ions, and an isolated sample of alternating sequence polymer is thus converted to a fully randomized material on heating with rubidium fluoride.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315612140
      Issue No: Vol. 28, No. 8 (2016)
  • Facile preparation of gold nanoparticles-decorated
           poly(o-phenylenediamine) hollow microspheres and their application for the
           detection of dopamine
    • Authors: Li, W; Li, D, Xiao, H, He, B.
      Pages: 993 - 1002
      Abstract: Gold (Au) nanoparticles-decorated poly(o-phenylenediamine) (PoPD@Au) hollow microspheres were successfully synthesized by a simple two-step process without any other templates or additives. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and ultraviolet–visible absorption spectra were performed to characterize the resulting samples. The results confirmed that the obtained PoPD@Au microspheres had a perfect hollow structure and revealed that there is an interaction between PoPD hollow microspheres and Au nanoparticles. Plausible explanation for the formation of PoPD@Au hollow microspheres has been elaborated. Furthermore, PoPD@Au hollow microspheres were immobilized onto the surface of a glassy carbon electrode and applied to construct a sensor. Cyclic voltammogram experiments indicated that the proposed sensor method had good sensitivity, stability, and repeatability.
      PubDate: 2016-09-29T00:26:35-07:00
      DOI: 10.1177/0954008315612141
      Issue No: Vol. 28, No. 8 (2016)
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