NMR study of phase composition and the process of phase separation in segmented polyurethanes
作者： D.Sh. Idiyatullin , V.S. Smirnov , M.P. Letunovskii , V.V. Strakhov
DOI: 10.1016/0032-3950(89)90118-4
关键词:
摘要: Pulse NMR methods have been employed to investigate the phase state and process of separation in segmented PUs based on 1,4-butanediol 4,4′-diphenylmethane diisocyanate with crystallizable (polybutylene glycol adipate) non-crystallizable as part PU ethylene polyesters. For both samples same Tg flexible blocks (-20°C) temperature disappearance microphase rigid (110°C) are observed. The segregation was found two stages acceleration rises a certain interval. crystallization processes were influence rate blocks.
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sci-hub.se 参考文章(4)
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