| 异丁烯阳离子聚合引发体系CH_3COO-t-Bu/BCl_3/CH_2Cl_2的研究 |
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| 引用本文： | 吴一弦,刘原林,武冠英,饶国英.异丁烯阳离子聚合引发体系CH_3COO-t-Bu/BCl_3/CH_2Cl_2的研究[J].北京化工大学学报(自然科学版),1990(3). |
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| 作者姓名： | 吴一弦 刘原林 武冠英 饶国英 |
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| 作者单位： | 北京化工学院高分子材料研究所，北京化工学院高分子材料研究所，北京化工学院高分子材料研究所，北京化工学院应用化学系 85级研究生 中国化工建设总公司 |
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| 摘 要： | 采用傅立叶红外光谱和紫外光谱的技术,研究了在极性溶剂CH_2Cl_2中异丁烯阳离子聚合的引发体系乙酸叔丁酯/三氧化硼/二氧甲烷中,各组分间的作用及组分配比对活性中心结构的影响,发现Lewis酸与酯的比值不同,体系中存在络合竞争,以至存在一种或两种(或以上)活性中心;当Lewis酸与酯之比很小时,活性中心失活,并由此探讨其聚合机理。
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| 关 键 词： | 异丁烯 阳离子聚合 活性 红外光谱 紫外光谱 |
Study on the Cationic Polymerization of Isobutylene Initiated by Tert-butylacetate/Boron Trichloride/Methane Dichloride System |
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| Wu Yixian Liu Yuanlin Wu Guanying.Study on the Cationic Polymerization of Isobutylene Initiated by Tert-butylacetate/Boron Trichloride/Methane Dichloride System[J].Journal of Beijing University of Chemical Technology,1990(3). |
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| Authors: | Wu Yixian Liu Yuanlin Wu Guanying |
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| Institution: | Wu Yixian Liu Yuanlin Wu Guanying (Institute of Polymer Materials) Rao Guoying (Department of Applied Chemistry) |
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| Abstract: | The cationic polymerization of isobutylene initiated by tert-butylacetate/boron trichloride/methane dichloride was investigated by means of FTIR and UV techniques. Experimental results show that there is a competing complexation among two complexes of H_2O/BCl_3 and CH_3COO-t-Bu/BCl_3. When the ratio of Lewis acid to ester was varied, one or more initiating centers would exist alone or simultaneously in the polymerization system. If the ratio of BCl_3 to CH_3COO-t-Bu was beyond a certain minimum value, the initiating center would lose its activity and was unable to initiate the polymerization. According to above competition reaction the mechanism of isobutylene polymerization in this system is proposed. |
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| Keywords: | isobutylene cationic polymerization living infrared spectros copy ultraviolet spectroscopy |
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