NMR study of the gamma radiolysis of poly(dimethyl siloxane) under vacuum at 303 K
作者： David J.T Hill , Christopher M.L Preston , Andrew K Whittaker
DOI: 10.1016/S0032-3861(01)00711-X
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摘要: The structural changes which occur on the gamma -radiolysis of poly(dimethyl siloxane) (PDMS) under vacuum at 303 K have been investigated using Si-29 and C-13 NMR. New units consistent with main chain scission crosslinking through both H-linking Y-linking reactions identified. results obtained various absorbed doses used to calculate G-values for crosslinking. G(S) = 1.3 +/- 0.2, G(D-CH2-R) 0.34 0.02 Y-Linking G(Y) 1.70 0.09 were radiolysis K. Thus predominates over PDMS these conditions, and, by contrast previous studies, Y-links shown be predominant form crosslinks. (C) 2001 Elsevier Science Ltd. All rights reserved.
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