Polymer Journals

Applied Polymer Composites

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Title: STRUCTURE AND PROPERTIES OF STYRENE-BUTADIENE RUBBER/MODIFIED HECTORITE CLAY NANOCOMPOSITES
Page Range: p.207-224
Author(s): Bharadwaj P; Pratibha Singh; Pandey K N; Vishal Verma; Srivastava S K
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 1
Issue No: No.4

Abstract
Nanocomposites of styrene-butadiene rubber reinforced with modified hectorite clay as nano reinforcement have been processed by solution blending. Hectorite has been modified by octadecyl amine (O-Hc); by grafting with silane coupling agent N-(3-trimethoxysilyl) propyl ethylene diamine (S-Hc) and by both methods (OS-Hc) to be used as a nano reinforcement material. Styrene-butadiene rubber nanocomposites based on Octadecyl amine (O-Hc) modified nanoclay; silane coupling agent N-(3-trimethoxysilyl) propyl ethylene diamine grafted nanoclay (S-Hc); and nanoclay modified by both methods (OS-Hc); as reinforcers show improved mechanical properties, as compared to styrene-butadiene-rubber. 61 Refs.

Title: INFLUENCE OF AMOUNT OF MAPE COMPATIBILISER ON TENSILE PROPERTIES OF HARDWOOD FIBER REINFORCED HIGH DENSITY POLYETHYLENE COMPOSITE
Page Range: p.225-228
Author(s): Ogunsile B O; Palsule S
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 1
Issue No: No.4

Abstract
30/70 Wood fibre/high density polyethylene (30/70 WF/HDP) composites processed with 1.5% maleic anhydride grafted polyethylene (MAPE) as compatibiliser show acceptable tensile modulus and tensile strength, comparable with that of composites processed with 3% compatibiliser. Increasing the amount of MAPE compatibiliser does not appear to improve tensile strength of the WF/ PE composites and highlights the need to optimise the amount of compatibiliser for efficient wood/polyethylene composites. 8 Refs.

Title: ENVIRONMENT FRIENDLY COMPOSITES OF RECYCLED HARDWOOD FIBER REINFORCED POLYPROPYLENE
Page Range: p.229-246
Author(s): Priyanka; Anshu Anjali Singh; Kishor Biswas
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 1
Issue No: No.4

Abstract
Environmentally friendly recycled hardwood fibre (RHWF) reinforced polypropylene (PP) composites (RHWF/PP) have been processed by using maleic anhydride rafted polypropylene (MAPP - polypropylene with 2% maleic anhydride grafting on it) as compatibiliser. RHW fibre was obtained by recycling chemically pulped hardwood fibre based paper, and has better strength as compared to recycled newspaper fibre produced by mechanical pulping. Tensile, flexural and impact properties of the composites are higher than those of the PP matrix, increase with increasing amounts of fibre in the composites, and are better than those of literature reported recycled newspaper fibre/polypropylene composites. Fibre/ matrix interfacial adhesion in these composites has been evaluated by scanning electron microscope and Fourier transform infra-red spectroscopy. 37 Refs.

Title: DIFFUSION AND TRANSPORT BEHAVIORS OF ALIPHATIC PROBE MOLECULES THROUGH UNTREATED AND TREATED METAKAOLIN FILLED NATURAL RUBBER COMPOSITES
Page Range: p.247-266
Author(s): Rohini Thimmaiah S; Siddaramaiah
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 1
Issue No: No.4

Abstract
Molecular transport of a series of aliphatic probe molecules (hexane, heptane and decane) through untreated and silane treated metakaolin (MK) filled cured natural rubber (NR) composite membranes has been studied in the temperature range 25-60 deg C using the sorption-gravimetric method. The coefficients of sorption (S), diffusion (D), and permeation (P) have been calculated for elastomeric membrane-aliphatic penetrant systems. Significant increases in the diffusion and permeation coefficients were observed with increase in the temperature of sorption experiments. In all of the elastomeric-probe molecule systems, the transport phenomenon was found to follow the non-Fickian mode of transport. From the temperature dependence of diffusion and permeation coefficients, the Arrhenius activation parameters, such as the activation energy for diffusion (ED) and permeation (EP) processes, have been estimated. Furthermore, the sorption results have been interpreted in terms of thermodynamic parameters such as change in enthalpy (eH) and change in entropy (HS). 27 Refs.

Title: CONSTANTS IN PALSULE EQUATION FOR TENSILE MODULUS OF SHORT FIBRE REINFORCED POLYMER COMPOSITES
Page Range: p.267-274
Author(s): Palsule S
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Journal: Applied Polymer Composites
Issue Year: apc
Volume: 1
Issue No: No.4

Abstract
Palsule equation for tensile Modulus of short fibre reinforced polymer composites has been derived as the first equation that accounts for the aspect ratio of reinforcement as follows: Ec cKL [EmVm mEfVf]VKT [(Ef + lambdaEm) +lambdaVf (Ef-Em / (Ef +lambdaEm) - psiVf (Ef -Em)]. This study demonstrates that Palsule equation predicts the Young's modulus of a short fibre reinforced polymer composite, more accurately, if KL and KT and not assigned fixed values of 1/8 and 1/4 respectively; and depending upon fibre distribution in the composite, the value of KL may vary between 1/2 and 1/8, and of KT may vary between 1/2 and 1/8. 16 Refs.

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