Polymer Journals

Polymers and Polymer Composites

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Title: TRACING THE VOID CONTENT DEVELOPMENT AND IDENTIFICATION OF ITS EFFECTING PARAMETERS DURING IN SITU CONSOLIDATION OF THERMOPLASTIC TAPE MATERIAL
Page Range: p.1-15
Author(s): Khan M A; Mitschang P; Schledjewski R
File size: 871K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.1

Abstract
The development of a simulation tool based on an existing model published in the literature to investigate the effects of consolidation force, processing speed, hot gas flow and repetitive passes on void content development during manufacture of fibre-reinforced thermoplastic composite laminate tapes is described. Experimental data for void distribution through thickness and density of carbon fibre-reinforced poly(etheretherketone) laminated plates manufactured by automatic tape placement process are discussed in comparison with the results of simulations using the model and the most significant processing parameters are identified. 16 refs.

Title: PREPARATION AND PROPERTIES OF CHLOROPRENE RUBBER (CR)/CLAY NANOCOMPOSITES
Page Range: p.17-21
Author(s): Cheng Y-Y; Yen Y-Y; Kao P-H; Lu N; Wang H-T
File size: 166K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.1

Abstract
The preparation by melt intercalation followed by curing and compression moulding of nanocomposites of chloroprene rubber with various proportions of sodium montmorillonite clay nanoparticles and an ammonium salt as organic modifier, and their characterisation by SAXS, TEM, TGA, DMA, and tensile testing, is described. The effects of filler and modifier contents on mechanical and thermal properties of the nanocomposites were investigated and the results are discussed in terms of filler dispersion and exfoliation. 10 refs.

Title: POLYANILINE/GRAPHITE NANOSHEETS COMPOSITES AND ITS CONDUCTING PROPERTIES
Page Range: p.23-29
Author(s): Wu X; Qi S; He J; Duan G
File size: 290K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.1

Abstract
The synthesis of a nanocomposite of polyaniline and graphite nanosheets via in situ oxidative polymerisation of aniline with ammonium persulphate as oxidising agent in the presence of hydrochloric acid, and its characterisation by electrical conductivity, SEM and TEM, is described. The morphology and electrical properties of the nanocomposite are discussed in comparison with those obtained for composites of polyaniline with natural graphite flakes and with expanded graphite prepared by analogous methods in terms of the formation of a conducting network in the nanocomposite. 27 refs.

Title: SURFACE AND COMPOSITE INTERFACE OF CARBON FIBRE MODIFIED BY PRE-IRRADIATION
Page Range: p.31-35
Author(s): Xu Z; Chen L; Liu L; Chen G; Wu X
File size: 203K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.1

Abstract
The surface modification of carbon fibres by gamma-irradiation at different dose levels followed by grafting with chloroepoxypropane, and characterisation of the fibres by SEM (surface morphology), dynamic contact angle analysis (surface free energy) and single fibre tensile testing before and after surface treatment, is described. The effects of irradiation dose on the interlaminar shear strength of composites of diglycidyl ether of bisphenol A-based epoxy resin with the modified fibres were investigated by short-beam flexural testing, and the results are discussed in terms of interfacial adhesion and the formation of covalent bonds between fibres and grafting agent. 18 refs.

Title: INFLUENCE OF COMPATIBILISER AND WOOD FLOUR ON THE NON-ISOTHERMAL CRYSTALLISATION BEHAVIOUR OF POLYPROPYLENE COMPOSITES
Page Range: p.37-44
Author(s): Guo C; Ma L; Wang Q
File size: 282K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.1

Abstract
The effects of compatibiliser and wood flour on the non-isothermal crystallisation behaviour and crystalline morphology of composites of polypropylene and wood flour with or without the addition of m-isopropenyl-alpha,alpha-dimethylbenzyl isocyanate-grafted polypropylene as compatibiliser were investigated by DSC and polarised optical microscopy, and the results are discussed in terms of nucleation. Avrami analysis of the non-isothermal crystallisation kinetics was performed and the activation energy was calculated by the Kissinger method. 33 refs.

Title: EFFECT OF MOLECULAR WEIGHT AND ITS DISTRIBUTION ON THE CRYSTALLINE MORPHOLOGY OF POLYPROPYLENE MATERIALS
Page Range: p.45-51
Author(s): Lei H; Xu T; Gao C T
File size: 264K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.1

Abstract
The effects of number-average molecular weight, weight-average molecular weight, and molecular weight distribution on the crystalline morphology of polypropylene were investigated by GPC (molecular weight and molecular weight distribution), XRD (crystallinity) and optical microscopy (crystalline morphology). The experimental data were subjected to statistical analysis and the results are discussed in terms of a linear relationship between the crystalline morphology parameters, crystallinity, number-average spherulite size, spherulite distribution width coefficient and the molecular weight distribution. 17 refs.

Title: IONICALLY CONDUCTING POLYMERS BASED ON IONIC LIQUID-PLASTICIZED STARCH CONTAINING LITHIUM CHLORIDE
Page Range: p.53-58
Author(s): Wang N; Zhang X; Liu H; Han N
File size: 204K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.1

Abstract
The preparation of cast films of ionically-conducting thermoplastic starch plasticised with the ionic liquid 1-allyl-3-methylimidazolium chloride with various concentrations of lithium chloride, and their characterisation by AFM, FTIR, TGA, DMTA, water absorption and volume resistivity measurements in comparison with those obtained for glycerol-plasticised starch is described. The effects of lithium chloride concentration on plasticisation, thermal stability, water absorption and electrical conductivity of the thermoplastic starch were investigated and the results are discussed in terms of potential applications as solid biopolymer electrolytes. 12 refs.

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