Polymer Journals

Polymers and Polymer Composites

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Title: INFLUENCE OF NANOCLAY ON THE MORPHOLOGY, ADHESIVE AND MECHANICAL PROPERTIES OF POLYSULFIDE MODIFIED EPOXY RESIN
Page Range: p.123-131
Author(s): Guchhait P K; Pradhan S; Kumar K D; Maji P K; Bhowmick A K
File size: 261K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.3

Abstract
The preparation of nanocomposites of an epoxy resin cured with a tertiary amine and modified with liquid polysulphide, and various proportions of organically modified montmorillonite clay nanoparticles, and their characterisation by XRD (filler dispersion), TEM (morphology), tensile stress-strain properties, tensile strength, elongation at break, DMA and SEM (fracture morphology) measurements, is described. The effects of organoclay content on the adhesive properties of the nanocomposites were investigated by lap shear tests using aluminium adherends and the results are discussed in terms of the interaction between the adhesive and substrate in the presence of filler. 30 refs.

Title: PREPARATION AND CHARACTERIZATION OF CORNCOB-g-ACRYLAMIDE/METHACRYLIC ACID
Page Range: p.133-137
Author(s): Song Y; Song Y; Zhang M
File size: 194K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.3

Abstract
The modification of corn cob by graft copolymerisation with a mixture of acrylamide and methacrylic acid using ferrous ammonium sulphate/hydrogen peroxide as redox initiator under various reaction conditions, and the characterisation of the products by FTIR, SEM and TGA, is described. The effects of monomer mass ratio, initiator concentration, reaction temperature and time on graft copolymerisation were investigated in terms of grafting percentage and grafting efficiency, and the results are discussed in terms of optimisation of reaction conditions and potential applications in wastewater treatment. 15 refs.

Title: PREPARATION OF THERMOPLASTIC ELASTOMER FROM EPOXIDISED NATURAL RUBBER AND POLYSTYRENE
Page Range: p.139-144
Author(s): Chuayjujt S; Sakulkijpiboon S; Potiyaraj P
File size: 403K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.3

Abstract
The preparation of thermoplastic elastomers based on blends of epoxidised natural rubber with different epoxide group contents, derived via in-situ epoxidation, and various proportions of polystyrene latex from a commercial source or synthesised in-house by emulsion polymerisation, is described. The products were characterised by tensile strength, elongation at break, Shore A hardness, morphology (SEM) and glass transition temperature (DSC), and the effects of polystyrene and epoxide group contents on mechanical and thermal properties of the blends are discussed in terms of compatibility and miscibility. 8 refs.

Title: EFFECT OF BARIUM SULFATE NANOPARTICLES ON MECHANICAL PROPERTIES AND CRYSTALLIZATION BEHAVIOUR OF HDPE
Page Range: p.145-152
Author(s): Chen X; Wang L; Shi J; Shi H; Liu Y
File size: 235K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.3

Abstract
The preparation via melt blending of nanocomposites of high density polyethylene with various proportions of barium sulphate nanoparticles modified by treatment with sodium stearate as filler, and their characterisation by SEM (morphology), DSC (crystallisation and thermal properties), XRD (crystal structure), DMA (storage modulus and loss tangent), tensile and impact testing, is described. The effects of filler content on mechanical properties and crystallisation behaviour of the nanocomposites were investigated and the results are discussed in terms of nucleation and reinforcement. 30 refs.

Title: SYNTHESIS, CHARACTERISATION AND PROPERTIES OF POLYURETHANE GRAFTED CHLORINATED POLYPROPYLENE AND ITS COMPOSITES
Page Range: p.153-158
Author(s): Wang X; Dong X; Liu D
File size: 170K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.3

Abstract
The synthesis of graft copolymers of chlorinated polypropylene (CPP) with polyurethane (PU) via the inter-chain polymer reactions between maleated CPP and PU prepolymers derived from poly(oxypropylene)diols and 4,4'-diphenylmethane diisocyanate, with or without diol or diamine extenders and containing free isocyanate groups, under various reaction conditions in the presence of a tertiary amine catalyst is described. The products were characterised by titration (free isocyanate content), FTIR (molecular structure), DSC (glass transition temperature), gloss and adhesive properties of films, and the effects of PU chain extenders on properties are discussed. 20 refs.

Title: PREPARATION AND CHARACTERISATION OF POLYETHYLENE/CLAY NANOCOMPOSITES AS A FLAME RETARDANT MATERIALS USING ULTRASONIC TECHNIQUE
Page Range: p.159-166
Author(s): Nour M; Eid A; El-Nagare K; Aziz F A
File size: 361K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.3

Abstract
The preparation by solution blending with sonication of nanocomposites of low density polyethylene with different proportions of montmorillonite clay organically modified with 1,2-dimethyl-3-hexadecylimidazolium bromide, and their characterisation by colour (UV-visible spectroscopy), ultrasonic testing (filler dispersion), TGA (thermal stability), AFM (surface morphology) and cone calorimetry (flammability), is described. The effects of organoclay content on peak heat release rate and flame retardant properties of the nanocomposites are discussed in terms of the formation of a clay-enriched protective char layer during combustion. 22 refs.

Title: PRESSURE TRANSFER BEHAVIOUR OF RUBBER MOULD AND THE EFFECTS ON CONSOLIDATION OF L-SHAPE COMPOSITE LAMINATES
Page Range: p.167-174
Author(s): Gu Y; Li M; Li Y; Zhang Z
File size: 303K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.3

Abstract
The pressure transfer properties of a rubber mould used in an autoclave process were investigated experimentally by measurements of the pressure distribution on the mould surface during processing using a pressure-sensitive paper. The effects of the pressure distribution on the interface between an L-shaped rubber male mould and an aluminium die in an autoclave process on the consolidation of L-shaped carbon fibre-reinforced bismaleimide resin composite laminates were investigated and the results are discussed in terms of defect formation and process control. 16 refs.

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