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Polymers and Polymer Composites

EFFECT OF HEAT TREATMENT ON THE IMPACT STRENGTH OF GLASS FIBRE REINFORCED POLYPROPYLENE

August 1, 2002 By: Lin J-S Research article

Title: EFFECT OF HEAT TREATMENT ON THE IMPACT STRENGTH OF GLASS FIBRE REINFORCED POLYPROPYLENE
Page Range: p.607-618
Author(s): Lin J-S
File size: 169K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 10
Issue No: No. 8

Abstract
An alternative method of improving the impact strength of glass fibre reinforced polypropylene by the use of heat treatment is described. Heat treatment is applied to injection moulded specimens in order to adjust the interfacial adhesion and hence the effectiveness of the transfer of stress from matrix to fibre. The interfacial adhesion is determined by measurement of the critical fibre length, which can be used to evaluate the effect of heat treatment on the impact strength of glass fibre-reinforced PP specimens. Results showed that impact strength increased with the testing temperature. At 25 degrees C, the impact strength was dominated by the fibre fracture mechanism, and at temperatures above 120 degrees C, it was found to be strongly influenced by the PP matrix, and at higher temperatures, the impact strength increased significantly because of the formation of extra cracks. 16 refs.

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