高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (6): 623.

• 研究论文 • 上一篇    下一篇

聚苯乙烯固载化聚乙二醇苄醚的合成、相转移催化及机理研究

梁逊, 齐红彦   

  1. 南开大学化学系
  • 收稿日期:1987-11-16 出版日期:1989-06-24 发布日期:1989-06-24
  • 通讯作者: 梁逊

Studies on Synthesis, Phase Transfer Catalysis and Catalytic Mechanism of Polystyrene-Supported Polyethylene Glycol Benzyl Ether

Liang Xun, Qi Hongyan   

  1. Department of Chemistry, Nankai University, Tianjin
  • Received:1987-11-16 Online:1989-06-24 Published:1989-06-24

摘要: 改进了聚苯乙烯固载化聚乙二醇苄醚的合成方法,并在正溴辛烷与固体NaI的亲核取代反应中考察了它们的相转移催化性能。结果表明,催化反应对n-C8H17Br浓度为表观1级。催化剂交联度越低,粒度越小,反应速率越大。大孔催化剂活性比凝胶催化剂高;聚乙二醇固载化后的活性比固载化前高,体系中水含量对反应速率也有影响。

关键词: 聚合物固载化, 聚乙二醇苄醚, 相转移催化

Abstract: Polystyrene-supported polyethylene glycol was synthesized using a imporved method. The phase-transfer catalysis was studied in the reaction of n-C8H17Br with solid Nal. The reaction rate was a first-order with respect to the concentration of n-C8H17Br. The observed reaction rate constant kobs increased as the degree of cross-linking and particle size of catalyst decreased. Macroporous catalysts showed a higher activity than that of microporous catalysts. Trace amount of water also showed some influence on kobs. kobs of PEGwas increased after it was immobilized. The solid-solid contact mechanism of S-S-Lsystem was confirmed by our experiment.

Key words: Polymer-supported, Polyethylene glycol benzyl ether, Phase-transfer catalysis

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