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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (3): 426-432. 上一篇    下一篇

研究论文

聚4-乙烯基吡啶/SiO~2纳米杂化材料负载茂钛催化剂的制备 及苯乙烯聚合

朱宁;唐涛;汪丽梅;崔冬梅;冯之榴;黄葆同   

  1. 东北大学理学院化工系;中国科学院长春应用化学所研究所;中国科学院高分子 物理与化学国家重点实验室;中国科学院中国石化总公司高分子化学联合开放实验 室;吉林工学院化学工程系.长春(130012)
  • 发布日期:2001-03-15

Preparation of poly (4-vinylpyridine)/silica hybrids supported cyclopentadienyltitanium trichloride (CpTiCl~3) catalyst and styrene polymerization

Zhu Ning;Tang Tao;Wang Limei;Cui Dongmei;Feng Zhiliu;Huang Baotong   

  1. Jilin College of Technology, Dept of Chem Eng.Changchun(130012)
  • Published:2001-03-15

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以聚4-乙烯基吡啶(PVP)为有机组分，正硅酸乙酯(TEOS)为无机组分，利用sol-gel方法制得PVP/SiO~2纳米杂化材料，以此为载体制备了杂化材料负载单茂钛催化剂。利用XPS和IR分析了载体与CpTiCl~3的结合方式，确认对苯乙烯聚合有两种活性中心，苯乙烯聚合结果表明在50℃左右间规度达到最大；在70℃，n(Al)/n(Ti)=1500时活性最高可达1.09×10^6gPS/(molTi·h)，GPC结果表明产物分子量分布呈双峰分布。

关键词: 聚乙烯基吡啶, 二氧化硅, 纳米相材料, 钛络合物, 金属茂络合物, 杂化材料, 载体, 苯乙烯, 聚合

Poly(4-vinylpyridine)/silica (PVP/SiO~2) organic-inorganic nanoscale hybrid was prepared using sol-gel method, in which PVP was used as CpTiCl~3 support. The XPS and IR measurements showed that two kinds of catalytic active site were formed through analyzing the interaction mode between support and CpTiCl~3. The results of styrene polymerization showed that syndiotactic was the highest at 50℃ . The catalytic activity was 1.09×10^6 g PS/(mol Ti·h) at 70℃ when n(Al) /n(Ti)=1500. GPC results showed a bimodal molecular weigth distribution.

Key words: POLYVINYL PYRIDINE, SILICON DIOXIDE, NANOPHASE MATERIALS, TITANIUM COMPLEX, METALLOCENES, HYBRID MATERIALS, CARRIERS, STYRENE, POLYMERIZATION

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