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EPR study of free radical decay in low density polyethylene filled with silica

✍ Scribed by F. Szőcs; M. Klimová; I. Chodák; I. Chorváth

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
196 KB
Volume
32
Category
Article
ISSN
0014-3057

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✦ Synopsis

Samples of polyethylene

and crosslinked polyethylene filled with different amounts of silica were prepared. Free radicals were generated by gamma radiation and measured by an EPR method. The rate constant for the decay of free radicals depends on the amount of the filler, as well as on the degree of polymer crosslinking.

The crosslinks and the interaction of polyethylene with inorganic filler slows down the transport of free radicals. Free radicals act as molecular probes and inform about the changes of molecular movement in main chains of the polymers.

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