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Dose evaluation in electron beam processing

1981; Pergamon Press; Volume: 18; Issue: 5-6 Linguagem: Inglês

10.1016/0146-5724(81)90283-1

2588-803X

Reina Tanaka, H. Sunaga, K. Yotsumoto, K. Mizuhashi, Naoyuki Tamura,

Electron and X-Ray Spectroscopy Techniques

Homo-polypropylene (HPP) and random terpolymer of propylene with 2% ethylene and 1% 1-butene by weight (RTPP) can be crosslinked with relatively high gel contents even at doses less than 20 kGy, when using trimethylpropanetriacrylate (TMPTA) and triallylcyanuate (TAC) as crosslinking agents. At high doses, HPP with TMPTA degrades more compared to HPP with TAC or RTPP with TMPTA, resulting in a significant increase of the melt index. Heat of fusion of the irradiated polypropylenes (PPs) indicates that the crosslinking and degradation are likely to have little effect on the crystallinity of the PP. Larger amounts of TMPTA in HPP gave rise to more degradation than crosslinking, since excesses of monomer prohibit crosslinking through homo-polymerization.