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Indexed by:期刊论文

Date of Publication:2010-02-01

Journal:COLLOID AND POLYMER SCIENCE

Included Journals:SCIE、EI

Volume:288

Issue:3

Page Number:307-316

ISSN No.:0303-402X

Key Words:Chemical crosslinking; UHMWPE-CF blends; Electrical resistivity; Young's modulus

Abstract:In an attempt to improve the mechanical property of polyethylene composite at high temperature, crosslinking of ultrahigh-molecular-weight polyethylene (UHMWPE) and carbon fiber (CF) blends was carried out by using dicumyl peroxide (DCP). The specimens were prepared by gelation/crystallization from solutions. The effect of chemical crosslinking on mechanical and electrical properties of UHMWPE/CF blends with composition of 1/0, 1/0.25, and 1/1 (w/w) were investigated in detail. Electrical conductivity and thermal mechanical properties of the blends with the 1/1 composition were greatly improved by incorporation of enough content of CF and adequate crosslinking network formation. Surprisingly, the Young's modulus of the 1/1 blend reached 20 GPa at room temperature (20 A degrees C). On the other hand, heat treatment at 135 A degrees C played an important role for obtaining a high PTC effect for the UHMWPE-CF blend in which the PTC intensity reached 10(7).