| 异丙氧基钕系催化剂合成窄分布聚异戊二烯 |
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| 引用本文： | 王凤,张春雨,张贺新,白晨曦,张学全.异丙氧基钕系催化剂合成窄分布聚异戊二烯[J].应用化学,2014,31(6):654-660. |
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| 作者姓名： | 王凤 张春雨 张贺新 白晨曦 张学全 |
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| 作者单位： | (1.中国科学院长春应用化学研究所，高性能合成橡胶中心 长春 130022；2.中国科学院大学 北京 100049) |
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| 基金项目： | 国家自然科学基金青年基金(51203147)资助项目~~ |
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| 摘 要： | 采用异丙氧基钕/二异丁基氢化铝/含氯化合物（Nd(OiPr)3/Al(iBu)2H/RCl）催化体系，催化异戊二烯（IP）聚合。 考察了氯源和陈化温度对聚合的影响，并通过IR、NMR和GPC等技术手段对聚合物的微观结构、相对分子质量及相对分子质量分布等进行了表征。 结果表明，氯源种类对聚异戊二烯的相对分子质量分布影响较大。 采用Nd(OiPr)3/Al(iBu)2H/Me2SiCl2催化体系可制得窄分布(MWD＜1.5)的聚异戊二烯；该体系催化异戊二烯聚合过程中，陈化温度对聚异戊二烯的MWD影响较大，在0~50 ℃陈化时，MWD可保持在1.5以下，陈化温度的进一步升高，MWD则变得很宽；同时，随陈化温度升高，聚合收率不断增加，聚合物1,4-结构含量稍有增加。
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| 关 键 词： | 异戊二烯 钕系催化剂 氯源 陈化温度 相对分子质量及相对分子质量分布 |
| 收稿时间： | 2013-08-21 |
| 修稿时间： | 2013-09-17 |
Synthesis of Polyisoprene with Narrow Relative Molecular Mass Distribution Using Nd(OiPr)3-based Catalytic System |
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| WANG Feng,ZHANG Chunyu,ZHANG Hexin,BAI Chenxi,ZHANG Xuequan.Synthesis of Polyisoprene with Narrow Relative Molecular Mass Distribution Using Nd(OiPr)3-based Catalytic System[J].Chinese Journal of Applied Chemistry,2014,31(6):654-660. |
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| Authors: | WANG Feng ZHANG Chunyu ZHANG Hexin BAI Chenxi ZHANG Xuequan |
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| Institution: | (1.Research Center of High Performance Synthetic Rubber,Changchun Institute of ;
Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;
2.Graduate School of the Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | The effects of chloride donor and aging temperature of neodymium isopropoxide/diisobutylaluminum hydride/chloride donor(Nd(OiPr)3/Al(i-Bu)2H/RCl) catalyst on isoprene polymerization were investigated. The resulting polymer was fully assessed by NMR, IR and GPC. Chloride donors greatly influenced the relative molecular mass distribution(MWD) of plyisoprene and only Nd(OiPr)3/Al(iBu)2H/Me2SiCl2 catalytic system could afford polyisoprene with a narrow MWD. In the Nd(OiPr)3/Al(iBu)2H/Me2SiCl2 catalytic system, the polymerization results showed that MWD of polyisoprene kept around 1.5 when the catalyst was aged at 0~50 ℃ and became much broader(MWD＞6.0) when the aging temperature was above 50 ℃. Additionally, the yield and 1,4-content of polyisopere increased with the aging temperature. |
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| Keywords: | isoprene neodymium-based catalytic system chloride donors aging temperature relative molecular mass distribution |
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