| 关于嵌段聚醚氨酯形态结构的研究 |
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| 引用本文： | 田楠,张广利,李历生,冯新德.关于嵌段聚醚氨酯形态结构的研究[J].高分子学报,1983,0(3):161-166. |
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| 作者姓名： | 田楠 张广利 李历生 冯新德 |
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| 作者单位： | 北京大学化学系
(田楠，张广利，李历生)，北京大学化学系(冯新德) |
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| 摘 要： | 本文主要研究了在溶液聚合中,用两种加料方式对嵌段聚醚氨酯(SPEU)本体形态结构的影响。由透射电镜观察的结果发现,在预聚反应过程中采用两种加料方式,其最终聚合产物(SPEU)都具有明显的两相结构;加料方式不同主要影响SPEU中分散相的形态和其内的聚集态结构:(1)采用将端羟基的聚四次甲基醚(PTMEG)溶液滴加到4,4′-二苯基甲烷二异氰酸酯(MDI)的溶液中,俟反应完成后再滴加入扩链剂(Extender)的加料方式所制得的SPEU其分散相在形态上呈现为小棒条状,这种分散微区的宽度一般在10—60nm范围内,从选区电子衍射结果证明这种微区的结构是结晶的。(2)而采用将MDI的溶液滴加到PTMEG溶液中,俟反应完成后再滴加Extender的加料方式所制备的SPEU其分散相在形态上呈现为球形,它们的直径多在100至300nm范围内,由电子衍射证明这种分散微区的结构是无定形的。
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| 收稿时间： | 1981-05-29 |
STUDIES ON THE MORPHOLOGY AND STRUCTURE OF SEGMENTED POLYETHER URETHANE |
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| Tian Nan,Zhang Guang-li,Li li-sheng,Feng Xin-de.STUDIES ON THE MORPHOLOGY AND STRUCTURE OF SEGMENTED POLYETHER URETHANE[J].Acta Polymerica Sinica,1983,0(3):161-166. |
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| Authors: | Tian Nan Zhang Guang-li Li li-sheng Feng Xin-de |
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| Institution: | Department of Chemistry; Peking University |
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| Abstract: | The influence of two different feeding ways of a two-step method of segmented polyether urethane (SPEU) solution polymerization on morphology of SPEU was investigated in electron microscope. SPBU prepared by PTMEG-MDT]-Extender reaction feedin way consists of two phases and the dispersion domains which are mainly made up of hard segments are small stick-shaped in morphology; electron diffraction pattern indicates that the domain is crystalline. SPEU prepared by PTMEG-MDI]-Extender reaction feeding way also showed two-phase structure; The domains are-spherical in shape, and they are amorphous. |
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