✦ LIBER ✦

ESR study on chemical crosslinking reaction mechanisms of polyethylene using a chemical agent. III. Effect of amine type antioxidants

✍ Scribed by Takanori Yamazaki; Tadao Seguchi

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 409 KB
Volume: 37
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19990201)37:3<349::aid-pola12>3.0.co;2-0

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✦ Synopsis

The effect of antioxidant on the reaction mechanism of chemical crosslinking of polyethylene with dicumyl peroxide (DCP) at high temperatures was investigated by electron spin resonance (ESR). The crosslinking reactions were induced by the alkyl radicals in polyethylene (PE) formed by the thermal decomposition of DCP above 120°C. The type and the content of radicals were much changed for amine type antioxidants on PE crosslinking. It was confirmed that the radicals originated from DCP decomposition reacted preferentially with the amine type antioxidants to produce the nitroxyl radical and that the antioxidants retarded the initiation reaction of the PE crosslinking reaction.

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