| 异丁烯的活性阳离子聚合反应 |
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| 引用本文： | 李梅,曹宪一. 异丁烯的活性阳离子聚合反应[J]. 高分子学报, 1999, 29(5): 596-599 |
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| 作者姓名： | 李梅 曹宪一 |
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| 作者单位： | 北京化工大学材料科学与工程学院,北京,100029 |
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| 摘 要： | 作者采用２ ，４ ，４ 三甲基 ２ 氯戊烷（ Ｔ Ｍ Ｐ Ｃｌ）／ Ｔｉ Ｃｌ４ 引发剂体系，在电子给体存在下，对异丁烯（ Ｉ Ｂ） 的活性阳离子聚合进行了研究．在 Ｔ Ｍ Ｐ Ｃｌ／ Ｔｉ Ｃｌ４／ Ｉ Ｂ 二氯甲烷／ 己烷（４０／６０ Ｖ／ Ｖ）／ － ８０ ℃聚合系统中，以 Ｎ， Ｎ 二甲基苯胺、吡啶及三乙胺为电子给体，对聚合反应速率及产物分子量分布的影响进行了研究．发现当 Ｎ， Ｎ 二甲基苯胺或三乙胺的浓度稍高于质子性杂质的浓度时，即能实现异丁烯的活性聚合，得到分子量分布较窄的聚合物．电子给体的主要作用是质子捕捉剂，抑制痕量水的引发，而且对阳离子具有稳定作用
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| 关 键 词： | 异丁烯 阳离子聚合 活性聚合 电子给体 |
LIVING CARBOCATIONIC POLYMERIZATION OF ISOBUTYLENE IN THE PRESENCE OF N,N-DIMETHYLANILINE OR Et3N AS ELECTRON PAIR DONORS |
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| LI Mei,CAO Xianyi. LIVING CARBOCATIONIC POLYMERIZATION OF ISOBUTYLENE IN THE PRESENCE OF N,N-DIMETHYLANILINE OR Et3N AS ELECTRON PAIR DONORS[J]. Acta Polymerica Sinica, 1999, 29(5): 596-599 |
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| Authors: | LI Mei CAO Xianyi |
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| Affiliation: | LI Mei, CAO Xianyi;(Institute of Material Science and Engineering,Beijing University of ChemicalTechnology,Beijing |
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| Abstract: | The living carbocationic polymerization of isobutylene( I B) has been investigatedby the 2 chloro 2 ,4 ,4 trimethylpentane ( T M P Cl)/ Ti Cl4 initiating system in the presence of N, N dimethylaniline ( D M A B) and Et3 Nas electron pair donors ( E Ds) by use ofthe mixedsolvent dichloromethane hexane (40/60 V/ V)/ at - 80 ℃under conventional laboratoryconditions. It is demonstrated that living polymerization can be achieved when theconcentration of electron pair donors such as D M A Bor Et3 Nis higher than that of tracewater in the polymerization system ,and that polymers with narrow molecular weightdistribution can be obtained . The rate of polymerizationis also reduced because of adding E Dswhich indicates that stabler active centers areformed . |
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| Keywords: | Isobutylene Living polymerization Cationic polymerization Electron pair donors |
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