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Stress-Strain, Morphological and Rheological Properties of Radiation-Crosslinked PVC/ENR Blend

Ratnam, Chantara Thevy, and Mohd Saiful Ahmad, (2006) Stress-Strain, Morphological and Rheological Properties of Radiation-Crosslinked PVC/ENR Blend. Malaysian Polymer Journal, 1 (1). pp. 1-10. ISSN 18237789

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Official URL: http://www.fkkksa.utm.my/mpj/images/01chantara.pdf

Affiliations

Malaysian Institute for Nuclear Technology Research (MINT)
Malaysian Institute for Nuclear Technology Research (MINT)

Abstract

The effect of irradiation on 50/50 poly(vinyl chloride)/ epoxidized natural rubber blend (PVC/ENR) was studied with particular attention to irradiation-induced crosslinking. The blend was irradiated by using a 3.0 MeV electron beam machine at doses ranging from 20 to 200 kGy in air and room temperature. The blends were characterized for rheology, morphology, and stress-strain properties. Electron beam irradiation of the blend in the presence of the TMPTA was found to cause crosslinking which in effect caused an enhancement in shear stress, viscosity and modulus together with a concomitant decline in ultimate elongation. The tensile strength of the blend reached a maximum at 60 kGy followed by a slight decrease at higher doses, implying embrittlement due to the excessive crosslinking. The scanning electron micrographs of the fracture surfaces of the irradiated blends show evidence consistent with the above contention. The flow of irradiated PVC/ENR blends remains pseudoplastics in nature.

Item Type:Journal
Additional Information:The authors wish to thank ALURTRON staff of MINT for the assistance during the irradiation. A sincere thanks also due to Mr Zahid Abdullah for the cooperation during the Rheological studies.
Keywords:irradiation, crosslinking, PVC/ENR blend, dose
Subjects:Q Science, Computer Science
T Technology, Engineering
ID Code:6228

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