Subjects -> MANUFACTURING AND TECHNOLOGY (Total: 363 journals)
    - CERAMICS, GLASS AND POTTERY (31 journals)
    - MACHINERY (34 journals)
    - MANUFACTURING AND TECHNOLOGY (223 journals)
    - METROLOGY AND STANDARDIZATION (6 journals)
    - PACKAGING (19 journals)
    - PAINTS AND PROTECTIVE COATINGS (4 journals)
    - PLASTICS (42 journals)
    - RUBBER (4 journals)

PLASTICS (42 journals)

Showing 1 - 39 of 39 Journals sorted by number of followers
Journal of Applied Polymer Science     Hybrid Journal   (Followers: 134)
Polymer     Hybrid Journal   (Followers: 88)
European Polymer Journal     Hybrid Journal   (Followers: 42)
Plastic and Polymer Technology     Open Access   (Followers: 40)
Plastic and Reconstructive Surgery     Hybrid Journal   (Followers: 31)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Reinforced Plastics     Full-text available via subscription   (Followers: 17)
Polymer Engineering & Science     Hybrid Journal   (Followers: 14)
Advances in Polymer Technology     Open Access   (Followers: 13)
ACS Applied Polymer Materials     Hybrid Journal   (Followers: 11)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 9)
Acta Polymerica     Hybrid Journal   (Followers: 9)
Journal of Inorganic and Organometallic Polymers and Materials     Hybrid Journal   (Followers: 8)
Polymer Bulletin     Hybrid Journal   (Followers: 6)
Journal of Polymer Research     Hybrid Journal   (Followers: 6)
International Journal of Polymeric Materials     Hybrid Journal   (Followers: 6)
Journal of Polymer Science Part C : Polymer Letters     Hybrid Journal   (Followers: 5)
Polymer-Plastics Technology and Materials     Hybrid Journal   (Followers: 5)
Advanced Industrial and Engineering Polymer Research     Open Access   (Followers: 5)
Polymer Science Series B     Hybrid Journal   (Followers: 4)
Polymer Science, Series A     Hybrid Journal   (Followers: 3)
Polymer Science Series C     Hybrid Journal   (Followers: 3)
Polymer Science Series D     Hybrid Journal   (Followers: 3)
Iranian Journal of Polymer Science and Technology     Open Access   (Followers: 1)
Progress in Rubber, Plastics and Recycling Technology     Hybrid Journal   (Followers: 1)
Microplastics and Nanoplastics     Open Access   (Followers: 1)
High Performance Polymers     Hybrid Journal   (Followers: 1)
Journal of Polymers and the Environment     Hybrid Journal   (Followers: 1)
International Polymer Processing     Full-text available via subscription   (Followers: 1)
Journal of Plastic Film and Sheeting     Hybrid Journal   (Followers: 1)
Plastics Engineering     Partially Free   (Followers: 1)
Polymers from Renewable Resources     Hybrid Journal  
International Journal of Biobased Plastics     Open Access  
Polymers and Polymer Composites     Hybrid Journal  
SPE Polymers     Open Access  
Majalah Kulit, Karet, dan Plastik     Open Access  
Cirugia Plastica Ibero-Latinoamericana     Open Access  
Journal of Elastomers and Plastics     Hybrid Journal  
Journal of Cellular Plastics     Hybrid Journal  
Similar Journals
Journal Cover
Journal of Plastic Film and Sheeting
Journal Prestige (SJR): 0.444
Citation Impact (citeScore): 1
Number of Followers: 1  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 8756-0879 - ISSN (Online) 1530-8014
Published by Sage Publications Homepage  [1174 journals]
  • From the Editor

    • Free pre-print version: Loading...

      Authors: John R. Wagner
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.

      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-10-01T12:34:37Z
      DOI: 10.1177/87560879221131869
       
  • Tetra functional epoxy/polyhedral oligomeric silsesquioxane (POSS)
           nanocomposites with enhanced mechanical, thermal, anticorrosion and
           dielectric properties

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      Authors: Dhanapal Duraibabu, Srinivasan Ananda Kumar, Muthukaruppan Alagar
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Tetra functional epoxy resin namely tetraglycidyl 1,4’-bis (4-amine-phenoxy) sulphone benzene epoxy (TGBAPSB) was developed via 1,4’-bis (4-amine-phenoxy) sulphone benzene (BAPSB) and epichlorohydrin. TGBAPSB was reinforced with polyhedral oligomeric silsesquioxane (POSS) nanomaterial in various weight percentages (1–2 wt%) and polyamidoimidazoline (Aradur 140) was used as curing agent. FT-IR results validated the molecular structure of the synthesized POSS. Dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA) evaluated the thermo-mechanical and thermal behaviour of TGBAPSB epoxy matrix and its organic-inorganic hybrid epoxy nanocomposites (TGBAPSB/POSS). X-Ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) investigated the surface morphological behaviour of the organic-inorganic hybrid epoxy nanocomposites. TGBAPSB epoxy resin with optimized POSS reinforcement exhibited excellent thermo-mechanical, thermal, mechanical, dielectric, and water absorption properties, making it a suitable material for advanced high-performance applications.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-07-20T05:20:54Z
      DOI: 10.1177/87560879221114650
       
  • Coating of a viscoplastic material onto a moving porous web during forward
           roll coating process: A theoretical study

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      Authors: Muhammad Zahid, Imran Siddique, Rifaqat Ali
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      In this paper, a mathematical model of forward roll for coating a thin viscoplastic fluid onto a moving porous web is developed when the web passes through a small gap between the two rigid rolls. The conservation equations in the light of lubrication approximation theory are non-dimensionalized and solutions for the velocity profile, flow rate, pressure distribution are calculated numerically by using Range-Kutta-Fehlberg’s method. It is found that by changing (increasing/decreasing) the material parameters, one can really control the engineering quantities like velocity distribution, flow rate, pressure distribution, and penetration depth The velocity graphs show that the gap between the velocity curves decrease, as fluid moves toward the separation point. This has a significant effect on the final volume of fluid flowing as at the separation point the fluid splits evenly. It was also found that the degree of fluid penetration is affected by the web flexibility and permeability. It has also been found that viscoelastic parameter and ratio of viscous to elastic forces have great impact on the emerging parameters, furthermore, the pressure gradient has been significantly affected with the variation in permeability and deformability. It is worth mentioning that the present study is a quick reference for the engineer working in coating industries and to compare the results with experimental data. Some results are shown graphically.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-07-18T07:17:18Z
      DOI: 10.1177/87560879221113638
       
  • Rheological impact of Sutterby fluid in isothermal forward roll coating
           process: a theoretical study

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      Authors: Alia Hanif, Zaheer Abbas, Sabeeh Khaliq
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      In this paper, the incompressible and isothermal flow of Sutterby fluid is investigated during the forward roll coating process. The mass and momentum equations are non-dimensionalized and simplified using lubrication approximation theory (LAT). Perturbative results are obtained for the velocity, pressure gradient, flow rate, and shear stress, while coating thickness, maximum pressure, separating point, roll separating force and roll-transmitted power are found by Simpson’s 3/8 rule. Outcomes exhibit that velocity, pressure gradient and coating thickness are substantially influenced by the non-Newtonian fluid parameter, which may increase the coating efficiency. Also, power input and roll separating force is directly proportional to the non-Newtonian parameter.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-07-13T07:08:14Z
      DOI: 10.1177/87560879221111820
       
  • Mechanical properties of thermoformed multilayer parts containing non
           thermoformable materials

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      Authors: Lisa-Maria Wittmann, Dietmar Drummer
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Different viscous materials were chosen to simulate the behavior of degraded materials in the thermoforming process and to demonstrate the potential of using multilayer sheets for thermoforming non thermoformable materials without losing final part performance. The mechanical properties of thermoformed multilayer sheets with 3, 22, and 50 melt flow index (MFI) polypropylenes (PP) were investigated. Therefore, a thermoformable material (MFI-3) and difficult/non thermoformable (MFI-22 and MFI-50) material was combined in the bilayer sheet. The extruded bilayer sheets had equal layer thicknesses (A/B 50%/50%) and unequal layer thicknesses (A/B 70%/30%), whereby B is always the material difficult to thermoform. As the non thermoformable material can lead to inhomogenity in the wall thickness and therefore can cause different part performance, the investigation focused on how the non thermoformable material influenced the mechanical performance of the final part. This labortory scale thermoformability investigation of the extruded PP sheets with different viscosities showed that the low viscous layer position has only a marginal influence on the general mechanical properties of the thermoformed parts. The mechanical properties can be predicted more precisely by the mechanical properties of the thermoformable material used than by the rule of mixtures. Whereas the Young’s modulus and yield stress change only negligibly, the elongation at break after thermoforming significantly increases with the stable component.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-06-17T10:01:02Z
      DOI: 10.1177/87560879221093977
       
  • Analytical study of isothermal blade coating process using Rabinowitsch
           fluid model

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      Authors: Z Abbas, S Khaliq, F Murtaza, MY Rafiq
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Blade coating process is widely applied in the industry for its practical applications in photographic films, paint industries, and magnetic storage devices. Also for manufacturing newspaper, metal coating, electronic circuit boards, and textile fibers. The blade coating process passes a fluid into the gap between the moving substrate and blade. This study uses the Rabinowitsch model which represents the Newtonian, shear thickening, and shear thinning effects by changing a non-linear parameter. Lubrication theory is used to simplify the dimensionless governing expressions. Then perturbation technique is used up to second order to solve the resultant system and validated by the numerical shooting technique. The graphs and tables present how the non-linear parameter affects the dimensionless velocity, pressure profile, coating thickness, and blade load. The non-linear model parameter proves to be the controlling parameter for the coating thickness, blade load, and pressure distribution, helping in determining the coating efficiency and improving the substrate life. This paper provides the theoretical framework for engineers to be applied in many industrial applications. In future, further validation of results can be done through experiments.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-06-15T12:15:29Z
      DOI: 10.1177/87560879221088932
       
  • Optimization of ethylene acrylic acid and low density polyethylene blend
           in tie-layer

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      Authors: Yong Zheng, Yiqing Jiao, Haewoong Park, Fei Chen, Byoungcheon Jo
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Ethylene acrylic acid copolymer (EAA) is widely used as tie-layer in multilayer film structures containing aluminum foil. EAA provides adhesion between the foil and rest of the film structure. It can be used alone or as a blend with low density polyethylene (LDPE), ordinarily between 20 and 50%. However, blending EAA and LDPE does not always produce desirable results. From time to time, a clear film becomes hazy as the EAA content is increased. At the same time, the adhesive strength to foil decreases. This study focuses on elucidating the mechanism behind the high haze and poor adhesion associated with EAA/LDPE blends and on determining factors that can optimize blend performance. The results from this study indicate that immiscibility, not viscosity mismatch, is the dominant factor affecting EAA/LDPE blends. In general, EAA with low acid content is more compatible with LDPE than EAA with high acid content. Processing parameters, such as extruder RPM and melt temperature, can also be selectively used to improve the blend haze or layer adhesion.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-06-14T07:58:53Z
      DOI: 10.1177/87560879221103302
       
  • Effects of magnesium borate on the mechanical performance, thermal and
           chemical degradation of polyethylene terephthalate packaging material

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      Authors: Bilal Demirel, Esra Kılıç, Ali Yaraş, Fatih Akkurt, Fugen Daver, Derya U Gezer
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      This study is on polyethylene terephthalate (PET) compounded with magnesium borate (MB) (Mg2B2O5) powders between (0.2–3.2% by weight) which were synthesized via sol-gel technique at laboratory-scale. The MB/PET composites were characterized in terms of chemical, thermal degradation, and mechanical properties. Their phases and chemical structures were identified by X-ray Diffraction and Fourier Transform Infrared analyses. The MB added into PET matrix significantly reduced PET degrading to acetaldehyde, carboxylic acids and diethylene glycol. However, while at 0.2 wt.% MB isophthalic acid (IPA) decreased and at higher MB concentrations there were higher IPA levels. The added MB increased the composites intrinsic viscosity (IV) compared to the pure PET. The highest IV (0.701 dL/g) was at the 0.2 wt.% MB/PET composite. Both Tg and Tm temperatures trended down up to 3.2 wt.% MB. Compared to pure PET, glass transition temperature (Tg) decreased to 80.4°C (at 3.2 wt.% MB) from 81°C, whereas melt temperature (Tm) decreased to 248.5°C (at 3.2 wt.% MB) from 249.4°C. The MB/PET composite tensile strength increased by 11.31% to a 60 MPa maximum at 0.2 wt.% MB compared to neat PET (53.9 MPa). However, at 0.4 wt. % and higher MB the dispersion was insufficient causing the MB powders to aggregate in the PET matrix, resulting in reduced tensile strength.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-06-06T04:39:28Z
      DOI: 10.1177/87560879221097640
       
  • A review on microphase separation measurement techniques for polyurethanes

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      Authors: Mehdi Gholami, Vahid Haddadi-Asl, Iman Sahebi Jouibari
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Polyurethanes (PUs) microstructure and characteristics is strongly affected by microphase separation that arises from the thermodynamic immiscibility between the hard and soft segments. The extent of phase separation as well as the morphology and size of the separated phase governs their mechanical, electrical, thermal, and functional properties. This review: (1) provides an insight into how phase separation affects PU properties, (2) explains methods used to study PU phase separation. We review approaches from the simplest one, that is, the transparency measurement, to the more advanced methods including the spectroscopic techniques (infrared, nuclear magnetic resonance spectroscopies and X-ray scattering), rheological instruments (rheometrics mechanical spectrometer), and thermal analyses (differential scanning calorimetry). We also discuss the theoretical calculations and the molecular modeling used to study PU phase separation.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-06-01T05:52:08Z
      DOI: 10.1177/87560879221088939
       
  • Research on preparation technology of animal skin intrinsic
           multifunctional packaging material

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      Authors: Jiaxing Zhang, Zhongzhen Long, Hui Chen, Zhihua Shan
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      High-end leather packaging material safe, environmentally friendly, and has a good market prospect. It is an interesting technology to solve the intrinsic functionalization of skin collagen packaging materials. Nano-Hydroxyapatite (HA) precursors solution with a specific 1.67 calcium to phosphorus ratio (Ca/P) were infiltrated into the three-dimensional collagen network matrix (3DCM) in situ growth based on goat skin pretreated with glutaraldehyde and the HAG-3DCM was obtained. After compression, a transparent film HAG-3DCM-was formed. Structural and functional characterization showed that the HAG-3DCM-CM film has good comprehensive performance, such as the tensile strength increased to 67 mPa from 28 mPa, the bending resistance increased from 5 cycles to 50 cycles and the swelling degree from 55% to 12%. HA disperses and fixes the three-dimensional collagen network matrix (3DCM) fibers, improves its stability against humidity and heat, and the thermal conductivity changed from 0.72 W/(K•m) to 0.65 W/(K•m). HAG-3DCM has a relatively high limiting oxygen index of 26.5%. This study demonstrates a new approach for preparing animal skin packaging materials with new application value.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-05-28T12:09:05Z
      DOI: 10.1177/87560879221093408
       
  • Enhancement of atomic oxygen resistance for heat-sealable isomeric
           co-polyimide films by combining ether linkage with diphenylphosphine oxide
           

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      Authors: Hongjiang Ni, Xiaoke Yang, Jun Li, Daijun Zhang, Jingang Liu, Shiyong Yang, Xiangbao Chen
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Heat-sealable isomeric co-polyimide (CPI) films with enhanced atomic oxygen (AO) resistance and mechanical strength were synthesized from 2,3,3′,4′-oxydiphthalic anhydride (aODPA), 4,4′-oxydianiline (ODA), and 2,5-bis [(4-aminophenoxy)phenyl]diphenylphosphine oxide (BADPO). We investigated how the molecular structure and diamine ratio affected the thermal properties, solubility, mechanical properties, AO resistance and heat-sealability. The diphenylphosphine oxide (DPO) side group decreased the CPI film mechanical strength and its higher ODA reactivity increased the molecular weight. At 10 mol% ODA in the aODPA-BADPO system, the CPI film exhibited increased tensile strength with no detriment to the AO resistance. Meanwhile, the CPI films demonstrated good heat-sealability indicated by a completely merged interface after heat sealing.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-05-19T02:59:58Z
      DOI: 10.1177/87560879221102635
       
  • Polymer/graphene nanofoam nanocomposites: Properties and potential

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      Authors: Ayesha Kausar
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Graphene is a nano-allotrope of carbon. It is a two dimensional (2D) one atom thick single layer of sp2 hybridized carbon atoms. An important form of graphene is the three dimensional (3D) graphene, also known as graphene nanofoam. This review article précises progress in the field of 3D graphene-based polymeric nanocomposites. The 3D macroscopic graphene nanostructures when used to reinforce polymer matrices attain superior structural and physical properties. This article considers the design, fabrication, characteristics, and promising applications of polymer/graphene nanofoam nanocomposites. The graphene nanofoam and polymer/graphene nanofoam nanocomposites have been prepared through advance approaches. The microstructure, electrical conductivity, specific capacitance, radiation shielding, mechanical properties, and other physical properties of the polymer/graphene nanofoam architectures have been studied. Interactions between the polymers and 3D graphene architecture are essential to enhance the nanocomposite performance. Polymer/graphene nanofoam nanocomposites applications are for solar cells, fuel cells, supercapacitors, and electromagnetic interference (EMI) shielding.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-04-28T08:42:10Z
      DOI: 10.1177/87560879221084353
       
  • From the Editor

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      Authors: John R. Wagner
      First page: 339
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.

      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-06-16T08:55:42Z
      DOI: 10.1177/87560879221110017
       
  • Industry News

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      First page: 341
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.

      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-06-17T05:24:17Z
      DOI: 10.1177/87560879221110018
       
  • Regulatory expert corner global food contact regulation updates for 2nd
           quarter 2022

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      Authors: Huqiu Zhang
      First page: 344
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.

      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-06-16T12:19:40Z
      DOI: 10.1177/87560879221109860
       
  • Blocking: Mowing the grass in your experimental backyard

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      Authors: Shari Kraber
      First page: 347
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.

      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-06-16T11:50:02Z
      DOI: 10.1177/87560879221109861
       
  • The effect of stretching and tie layer composition on adhesion strength of
           multi-layered films

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      Authors: Mou Paul, Barry Morris, Jeff Weinhold, Karlheinz Hausmann
      First page: 351
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Multilayer films are widely used in flexible packaging to provide an optimum balance of performance and cost. Orientation in the semi-solid state via tenter frame, double bubble, and machine direction orientation processes enhances barrier and mechanical properties and offers a means toward light weighting packaging structures. Interlayer adhesion of coextruded films, however, substantially decreases during the orientation as the generated new interfacial area decreases bond density and chain segments are stressed. A guideline is proposed that provides insight into how changes during orientation in chain segment penetration, entanglement, bond orientation, and density affect peel strength because of semi-solid state orientation. Examples are provided that use these insights to design novel tie resins with improved performance.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-03-18T08:07:54Z
      DOI: 10.1177/87560879211063475
       
  • Mathematical simulation of the calendering process for non-Newtonian
           polymers

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      Authors: Muhammad Asif Javed, Sarah Nasir, Nasir Ali, Sabeen Arshad
      First page: 369
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      This paper mathematically studies calendering with a tangent hyperbolic model to simulate non-Newtonian polymers. The constitutive equations based on Lubrication Approximation Theory (LAT) are first non-dimensionalized and then simplified. The simplified equations describing the flow inside the calender are solved (a) analytically using the perturbation method and (b) numerically using MatLab built-in routine “BVP4c” method. The first case obtains an analytical expression for velocity, pressure gradient, and final sheet thickness with the help of the perturbation method, while BVP4c and Runge-Kutta methods are used to calculate the velocity, pressure, pressure gradient, and mechanical quantities numerically. The power-law index and Weissenberg number influence on pressure, pressure gradient, and velocity profiles of fluid being calendered are shown with graphs. The pressure inside the calender decreases as the power-law index and Weissenberg number increase. The force function and final sheet thickness decreases as the power-law index and Weissenberg number increases.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-01-27T11:46:31Z
      DOI: 10.1177/87560879211066900
       
  • The effect of polycarbodiimide chain extender on thermal stability and
           mechanical properties of biobased poly(lactic acid)/natural rubber blown
           films

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      Authors: Kornchanok Akaradechakul, Peerapong Chanthot, Noppadon Kerddonfag, Cattaleeya Pattamaprom
      First page: 396
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      This is the first study investigating how polycarbodiimide (PCDI) delays thermal degradation of poly(lactic acid)/natural rubber blends (PLA/NR) during the preparation of PLA/NR masterbatches (MB) and PLA/MB compounds for the film blowing process. The PCDI concentration used in this work was from 0 to 1 wt%. The torque plastograms, FTIR, and 1H-NMR spectra indicated the successful chain extending reaction between the PCDI carbodiimide group and the PLA carboxyl group, and there was no reaction with NR domains. The reaction increased the PLA/MB compounds’ viscosity and improved processability and mechanical properties of PLA/MB blown films. The optimal PCDI content for the highest melt strength, film blowing stability, and mechanical properties was at 0.25 wt% PCDI. Undesirable gel spots were observed in the PLA/MB blown film at PCDI concentrations higher than 0.5 wt%.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-03-26T06:55:29Z
      DOI: 10.1177/87560879211058679
       
  • Numerical analysis of two-layered isothermal calendering of viscoplastic
           and Newtonian fluids with different viscosity ratios

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      Authors: Muhammad Ilyas, Muhammad Zahid, Muhammad Mushtaq
      First page: 416
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Co-extruded multi-layer plastic sheets and polymer structures formed by calendering process or by cold rolling are widely used in the packaging industry and thin-film transistor manufacturing. The different materials are extruded from separate extruders into the single sheet die which delivers a multi-layer sheet with uniform layer thickness at die exit. This multi-layer sheet is then stretched between counter-rotating rolls to obtain final uniform multi-layer sheet. There are many factors which can influence this process. In this article, calendering a single layer Newtonian or Non-Newtonian material has been extended to analyze a two-layer calendering process for an incompressible Viscoplastic and Newtonian fluids as upper and lower layers with different viscosity ratios. To simplify the equations of motion, the lubrication approximation theory is used. The expressions of non-dimensional pressure gradient, pressure and velocity distribution of both layers are obtained analytically by using proper no slip boundary conditions and dimensionless variables. The dimensionless detachment point is approximated by Regula-Falsi (false position) method. The important engineering factors including detachment point, calendered sheet thickness, roll separation force, power input by rolls, torque on each roll, and adiabatic temperature are all computed. In addition, how the viscosity ratios and viscoplastic casson parameter affect these factors have been investigated. Moreover all established results in literature for single layer calendering Newtonian fluids are also validated at casson parameter β tending towards infinity.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-05-24T06:59:58Z
      DOI: 10.1177/87560879221093902
       
  • Effect of nanofillers on polyurethane/polystyrene matrix nanocomposites:
           Characteristics and forthcoming developments

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      Authors: Ayesha Kausar
      First page: 438
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Polyurethane and polystyrene are significant thermoplastic polymers having unique physical properties. This article considers the research trials on the fabrication, remarkable features, and technical applications of the polyurethane/polystyrene nanocomposites. The carbonaceous nano particles and inorganic nanofillers used with the polyurethane/polystyrene blend or copolymer are carbon nanotube, graphene, nanoclay, silica nanoparticles, and others. The considerable improvements in the physical properties of the polyurethane/polystyrene blend may occur through the nanofiller addition. The physical or covalent interactions between the blend or copolymer components and nanofillers may also positively affect the nanocomposite properties. The fabrication strategies used for the polyurethane/polystyrene nanocomposites include solution method, in situ method, melt blending, and several nanocomposite processing approaches. The structure, morphology, electrical conductivity, thermal stability, mechanical strength, and several other physical properties of the high performance polyurethane/polystyrene nanocomposites have been explored. Major application areas identified are shape memory, membrane, and gas transport properties.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-02-18T01:59:16Z
      DOI: 10.1177/87560879211059859
       
  • Food packaging and its oxygen transfer models in active multilayer
           structures: A theoretical review

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      Authors: Rubia Viana Batista, Wanderson Gonçalves Wanzeller, Loong-Tak Lim, Ernesto Quast, Vânia Zanella Pinto, Vivian Machado de Menezes
      First page: 458
      Abstract: Journal of Plastic Film & Sheeting, Ahead of Print.
      Many food products are sensitive to oxygen which can promote rancidity, aerobic microorganism growth, browning, vitamin degradation, flavor loss, and other undesirable reactions. Active packaging concepts have been successfully applied to delay these deteriorative phenomena. In particular, oxygen scavengers help limit O2 ingress into packaging thus extending product shelf-life and thereby reducing food waste. Besides oxygen barrier polymers, other composite materials have been developed to reduce the overall O2 permeability into the package by adding oxygen scavengers or barrier fillers into the packaging structures. Typical thermoplastic food packaging barrier properties are summarized, including commercially available ones, and reported in the patent literature. Furthermore, various mathematical models have been developed to predict the oxygen transport behavior in active packaging to simulate oxygen transport in polymeric and composite materials. Such models are helpful to provide a better understanding of the mass transport fundamentals involved and shorten product development cycle time and cost. This review provides an overview of various oxygen absorber systems used in active food packaging. It also summarizes the mathematical models that simulate oxygen transport and absorption in different polymer films. Finally, these models can be adapted for other polymers and O2 scavengers to simulate O2 transfer on active polymeric materials. Simulation tools help the fundamental understanding of the O2 transport behavior and facilitate to developing novel active packaging systems that extend food shelf-life and enhance their safety.
      Citation: Journal of Plastic Film & Sheeting
      PubDate: 2022-01-27T11:40:43Z
      DOI: 10.1177/87560879211070465
       
 
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