ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The results of thermal, mechanical, and conductivity studies of polymer composites prepared by polymerization of acetylene in low-density polyethylene (LDPE) films impregnated with a Ziegler-Natta catalyst are presented and discussed. The enthalpy of melting of the LDPE component decreases as the amount of polyacetylene (CH)x grown in the matrix increases and is rationalized as being due to entanglement effects, although grafting cannot be unequivocally ruled out. Composites prepared well below the melting point of the LDPE matrix possess enhanced tensile moduli and tensile strengths at break, compared with pristine LDPE; this suggests reinforcement of the LDPE amorphous regions by the (CH)x chains. Measurements of electrical conductivity as a function of (CH)x content for a series of iodine-doped composites reveal an apparent percolation threshold at ca. 3 wt % (CH)x.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1983.170210910
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