| 聚醚型多嵌段共聚物软链段结晶特性的研究 |
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| 引用本文： | 沈德言,徐端夫,闻再庆,徐根宝.聚醚型多嵌段共聚物软链段结晶特性的研究[J].高分子学报,1981,0(3):200-205. |
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| 作者姓名： | 沈德言 徐端夫 闻再庆 徐根宝 |
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| 作者单位： | 中国科学院化学研究所
(沈德言，徐端夫，闻再庆)，中国科学院化学研究所(徐根宝) |
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| 摘 要： | 本文使用虹外光谱及膨胀计等方法,对聚四亚甲基醚二醇类多嵌段共聚物的软链段结晶性进行了研究。在聚醚-聚酯多嵌段共聚物中(PTMEG>60％),其软链段结晶的熔点和结晶速率均随PTMEG含量减少而下降。而在聚醚-聚脲胺酯多嵌段共聚物中,由于N—H和C—O—C之间氢键的作用,即使在低温下,其软链段也难于结晶。此外,高倍拉伸会提高上述二类多嵌段共聚物中软链段结晶的熔点和结晶速率。
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| 收稿时间： | 1980-03-04 |
THE CRYSTALLIZATION OF SOFT SEGMENTS OF POLYETHER-BASED SEGMENTED COPOLYMERS |
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| Shen De-yan,Xu Duan-fu,Wen Zai-qing,Xu Gen-bao.THE CRYSTALLIZATION OF SOFT SEGMENTS OF POLYETHER-BASED SEGMENTED COPOLYMERS[J].Acta Polymerica Sinica,1981,0(3):200-205. |
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| Authors: | Shen De-yan Xu Duan-fu Wen Zai-qing Xu Gen-bao |
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| Institution: | Institute of Chemistry; Academia Sinica |
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| Abstract: | The crystallinity of soft" segments of polytetramethylene ether glycol (PTMEG)-based segmented copolymers was investigated by infrared spectroscopy and dilatometry. Results showed that the melting point and crystallization rate of soft segments decraese with decreasing of the content of the PTMBG component in polyether-polyester seg-. mented copolymers. However the soft segments of polyether-polyureaurethane segmented copolymers do not tend to crystallize even at low temperatures (e.g. - 28℃ 30 min.), due to the hydrogen bond interaction between NH and C-O-C. In addition, high draw ratio will increase the melting point and crystallization rate of the soft segments for both types of segmented copolymers. |
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