| 含氮试剂调节异丁烯阳离子聚合中TiCl4的反应级数 |
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| 引用本文： | 谭永霞,吴一弦,武冠英.含氮试剂调节异丁烯阳离子聚合中TiCl4的反应级数[J].北京化工大学学报(自然科学版),2001,28(4):37-39,43. |
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| 作者姓名： | 谭永霞 吴一弦 武冠英 |
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| 作者单位： | 北京化工大学可控化学反应科学与技术基础教育部重点实验室, 北京 100029 |
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| 基金项目： | 中国石化集团公司资助项目;599016; |
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| 摘 要： | 分别研究了在N,N－二甲基乙酰胺(DMA)、吡啶(PY)或三乙胺(TEA)等不同种类的含氮试剂(ED)存在下,H2O/TiCl4体系引发异丁烯(IB)阳离子聚合的反应动力学,探讨了在不同ED条件下TiCl4浓度对聚合反应的表观增长速率常数(kAp)的影响,从而求出了TiCl4在聚合反应中的反应级数。实验结果表明,随着TiCl4浓度的增加,聚合反应转化率增加,聚合速率加快,在添加给电子性强的DMA、PY或TEA时,聚合速率与TiCl4浓度均呈现一级动力学关系。
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| 关 键 词： | 阳离子聚合 异丁烯 给电子体 动力学 引发剂 含氮试剂 四氯化钛 反应级数 聚异丁烯 |
| 收稿时间： | 2001-04-04 |
Reaction order of TiCl4 in cationic polymerization of isobutylene in the presence of the reagents containing nitrogen |
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| TAN Yong,xia,WU Yi,xian,WU Guan,ying.Reaction order of TiCl4 in cationic polymerization of isobutylene in the presence of the reagents containing nitrogen[J].Journal of Beijing University of Chemical Technology,2001,28(4):37-39,43. |
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| Authors: | TAN Yong xia WU Yi xian WU Guan ying |
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| Institution: | The Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education,Beijing University of Chemical Technology , Beijing 100029,China |
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| Abstract: | The kinetic study of the cationic polymerization of isobutylene ( IB) using H2O/ TiCl4 initiating system in the presence of the reagents containing nitrogen ( ED) in CH2Cl2 solvent was conducted at - 30 ℃. The reaction order with respect to TiCl4 was investigated in the polymerization of IB when different EDs , such as pyridine (PY) ,N ,N－dimethylacetamide (DMA) , or triethylamine ( TEA) was added respectively. The experimental results show that the conversion and polymerization rate increase with TiCl4 concent ration. A first－order dependence on TiCl4 concent ration was observed in the presence of DMA , PY or TEA with high donorcity. |
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| Keywords: | cationic polymerization isobutylene electron donor kinetic |
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