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- W2385469757 abstract "To synthesize polycarbosilane(PCS) derived low oxygen SiC fibers(Hi Nicalon), a 10~15 MGy irradiation is required for PCS′s curing. It is necessary to lower the irradiation doses in view of efficiency and costs. In the paper, various vinyl containing PCS(Vi PCS) were prepared by a thermal co polymerization of PCS and ammonolysis product of ViMeSiCl 2. They were crosslinked with electron beam(EB) irradiation in helium atmosphere. Effects of EB irradiation and vinyl content on the structure properties of Vi PCS precursors were analyzed. It shows that the more vinyl contained in Vi PCS increases rapidly its melting point and decreases its gel dose. The Vi PCS with a vinyl content of 2.33 mass percent is cured at just 5 MGy, much lower than that of the pure PCS. Vinyl can enhance PCS′s irradiation crosslinking by stimulating its Si-H bonds′ rearrangements through a free radical reaction. Little oxygen is contained in the irradiated Vi PCS precursors." @default.
- W2385469757 created "2016-06-24" @default.
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- W2385469757 date "2000-01-01" @default.
- W2385469757 modified "2023-09-25" @default.
- W2385469757 title "STUDY ON THE ENHANCED IRRADIATION CROSSLINKING OF POLYCARBOSILANE" @default.
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