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Polymers and Polymer Composites

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Title: PREPARATION OF HIGH MOLECULAR WEIGHT POLY(VINYL CARBAZOLE) WEB BY ELECTROSPINNING
Page Range: p.127-132
Author(s): Kim H S; Lee K B; Lyoo W S
File size: 320K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 17
Issue No: No.3

Abstract
The preparation of high molecular weight poly(N-vinyl carbazole) webs by electrospinning under various processing conditions from solutions of the polymer in chloroform, and their characterisation by electrical conductivity and morphology (SEM), is described. The effects of solution concentration, applied voltage and tip-to-collector distance on the spinnability, shape, and diameter and uniformity of the fibres in the web were investigated and the results are discussed. 24 refs.

Title: THERMAL CHARACTERISATION OF SHORT NYLON-6 FIBRE-REINFORCED NBR COMPOSITES
Page Range: p.133-140
Author(s): Rajesh C; Manoj K C; Unnikrishnan G; Purushothaman E
File size: 171K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 17
Issue No: No.3

Abstract
The thermal properties of composites of acrylonitrile-butadiene rubber (NBR) reinforced with various proportions of short nylon-6 fibres and cured with dicumyl peroxide or sulphur systems were investigated by TG and DSC, and the resulting degradation temperatures, temperature-dependent weight loss, and glass transition temperatures were compared with those for NBR itself. The effects of the addition of hexamethylene tetramine/resorcinol or phthalic anhydride as bonding agents on thermal stability of the composites were investigated, and the results are discussed. 23 refs.

Title: BISMALEIMIDE MODIFIED EPOXY-DIALLYLBISPHENOL SYSTEM EFFECT OF BISMALEIMIDE NATURE ON PROPERTIES
Page Range: p.141-149
Author(s): Devi K A; Nair C P R; Ninan K N
File size: 215K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 17
Issue No: No.3

Abstract
The properties of ternary blends of novolac epoxy resin, diallyl bisphenol A, and three different types of bismaleimides (BMIs), namely 2,2-bis-4-(4-maleimidophenoxy)phenylpropane, bis(4-maleimidophenyl)methane and bis(4-maleimidophenyl)ether, were investigated after curing by FTIR, TGA, DSC and adhesive properties. The effects of BMI type on the properties of laminates of the ternary blends with glass fabric were investigated by flexural strength, compressive strength, interlaminar shear strength and interfacial shear strength measurements, thermal and physical properties, such as linear expansion, density, resin content, void content and water absorption, and the results are discussed. 10 refs.

Title: PROCESSING AND PERFORMANCE EVALUATION OF NANOCLAY INFUSED EPON 828
Page Range: p.151-159
Author(s): Hosur M V; Gebremedhin O; Jeelani S
File size: 453K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 17
Issue No: No.3

Abstract
The preparation of nanocomposites of epoxy resin infused with various proportions of a commercially available surface modified montmorillonite nanoclay as filler, and their characterisation by DMA, quasi-static compression testing, tensile testing, flexural testing, high strain rate compression using the split Hopkinson pressure bar, and SEM analysis of fracture surfaces, is described. The effects of filler content on mechanical and thermomechanical properties of the nanocomposites are discussed in terms of phase morphology and interfacial interactions. 12 refs.

Title: EFFECTIVE SURFACE DEFORMATION HEIGHT AND BOND RIGIDITY OF GFRP REINFORCING BARS WITH RIBS
Page Range: p.161-171
Author(s): Moon D Y; Ebead U A; Benmokrane B
File size: 426K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 17
Issue No: No.3

Abstract
Evaluation of the bond behaviour of glass fibre-reinforced epoxy resin (GFRP) reinforcing bars with ribs was investigated experimentally by pull-out tests on the rebars embedded in concrete to determine an accurate bond stress-slip law and to determine failure mode by SEM analysis of the pulled-out GFRP rebars at failure. The experimental data are compared with the results of finite element simulations of specimens subject to pull-out tests and the results are discussed in terms of the effective surface deformation height and bond rigidity of the GFRP rebars. 13 refs.

Title: PREPARATION OF NATURAL RUBBER/CASSAVA STARCH/ORGANO-MONTMORILLONITE BIODEGRADABLE NANOCOMPOSITE ELASTOMERS
Page Range: p.173-179
Author(s): Chuayjuljit S; Wiriyasoonthorn S; Jiratumnukul N; Limpanart S
File size: 362K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 17
Issue No: No.3

Abstract
The preparation of biodegradable nanocomposite elastomers from natural rubber latex with various proportions of cassava starch and organically-modified montmorillonite (OMMT) clay, and their characterisation after curing by XRD, TEM, tensile testing, water absorption and soil burial tests, is described. The results are discussed in terms of the effects of starch and OMMT contents on structure, tensile properties, water sorption, biodegradability and morphology of the nanocomposites. 27 refs.

Title: POLYCARBONATE/POLYAMIDE 6/NANOCLAY TERNARY NANOCOMPOSITE MEMBRANES: PREPARATION, CHARACTERISATION, AND GAS SEPARATION PROPERTIES
Page Range: p.181-187
Author(s): Gholizadeh B; Arefazar A; Barzin J
File size: 395K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 17
Issue No: No.3

Abstract
The fabrication of polymer ternary nanocomposite membranes by the solution casting technique using a blend of polycarbonate as matrix phase with various proportions of polyamide-6 as dispersed phase and a commercial nanoclay as filler, and their characterisation by SEM (cross-sectional morphology), AFM (surface roughness) and XRD (dispersion), is described. The permeability of the membranes was calculated using theoretical models, and the effects of blend composition on permeability are discussed in terms of surface roughness, free volume and porosity. 40 refs.

Title: SYNTHESIS, CHARACTERISATION AND ANALYSIS OF HIBISCUS SABDARIFFA FIBRE REINFORCED POLYMER MATRIX BASED COMPOSITES
Page Range: p.189-194
Author(s): Singha A S; Thakur V K
File size: 255K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 17
Issue No: No.3

Abstract
The synthesis of composites of phenol-formaldehyde resin reinforced with various proportions of the natural fibre derived from Hibiscus Sabdariffa, and their characterisation by tensile strength, compressive strength, flexural strength, wear testing, stress-strain properties, morphology (SEM) and thermal analysis (TGA/DTA), is described. The effects of fibre content and resin composition on mechanical properties of the composites were investigated and the results are discussed. 17 refs.

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