| 聚酯-聚醚多嵌段共聚物结晶时的分聚现象 |
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| 引用本文： | 徐懋,胡世如,吴美琰,陈传福,金永泽. 聚酯-聚醚多嵌段共聚物结晶时的分聚现象[J]. 高分子学报, 1982, 0(1): 27-31 |
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| 作者姓名： | 徐懋 胡世如 吴美琰 陈传福 金永泽 |
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| 作者单位： | 中国科学院化学研究所(徐懋，胡世如，吴美琰，陈传福)，中国科学院化学研究所(金永泽) |
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| 摘 要： | 观察到聚酯-聚醚多嵌段共聚物在本体状态下结晶时的分聚现象。共聚物分子分聚形成的结晶具有不同的熔点,分别为140℃和160℃。可以用薄层色谱方法分开具有不同熔点的级分。结果表明,一个级分的分子中硬链段较长,但硬段含量较低,另一级分则硬段较短,但硬段含量则较高。这可能是由于聚合体系中组分间混溶性不好引起的。
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| 收稿时间： | 1981-01-15 |
SEGREGATION OF POLYESTER-POLYETHER SEGMENTED COPOLYMER ON CRYSTALLIZATION |
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| Xu Mao,Hu Shi-ru,Wu Mei-yan,Chen Chuan-fu,Jin Yong-ze. SEGREGATION OF POLYESTER-POLYETHER SEGMENTED COPOLYMER ON CRYSTALLIZATION[J]. Acta Polymerica Sinica, 1982, 0(1): 27-31 |
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| Authors: | Xu Mao Hu Shi-ru Wu Mei-yan Chen Chuan-fu Jin Yong-ze |
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| Affiliation: | Institute of Chemistry; Academia Siniea |
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| Abstract: | The segregation on crystallization of polyester-polyether segmented copolymer in bulk has been observed, copolymer molecules segregate and form crystals of different melting point located near 140℃ and 160℃. Fraction of different melting point can be separated by thin layer chromatography. Eesults show that molecules of the higher melting point fraction have larger hard segment length and lower hard segment content, in contrast, molecules of the fraction of lower melting point have shorter hard segment length but more hard segment content. The heterogeneity in composition of the copolymer is supposed to be resulted from the poor compatibility between the components of the polycondensation system. |
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