高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (9): 2968.doi: 10.7503/cjcu20210266

• 高分子化学 • 上一篇    下一篇

聚苯乙烯微球负载脲催化剂与碱协同催化环内酯的开环聚合

马钰琨, 金慧, 任传利(), 李志波()   

  1. 青岛科技大学化工学院, 青岛科技大学高分子科学与工程学院, 青岛 266042
  • 收稿日期:2021-04-20 出版日期:2021-09-10 发布日期:2021-09-08
  • 通讯作者: 李志波 E-mail:chuanli@iccas.ac.cn;zbli@qust.edu.cn
  • 作者简介:任传利, 女, 博士, 讲师, 主要从事有机分子催化剂的设计、 合成及在聚合物材料合成中的催化性能研究. E-mail: chuanli@iccas.ac.cn
  • 基金资助:
    国家自然科学基金(21704049);山东省生态化工协同创新中心青年人才基金(XTCXQN08)

Ring-opening Polymerization of Cyclic Esters Using Recyclable Polystyrene Supported Urea-Base Binary Catalyst

MA Yukun, JIN Hui, REN Chuanli(), LI Zhibo()   

  1. College of Chemical Engineering,College of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China
  • Received:2021-04-20 Online:2021-09-10 Published:2021-09-08
  • Contact: LI Zhibo E-mail:chuanli@iccas.ac.cn;zbli@qust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21704049);the Talent Fund of Shandong Collaborative Innovation Center of ECO?Chemical Engineering, China(XTCXQN08)

摘要:

通过环己基异氰酸酯和4-三氟甲基苯异氰酸酯分别与氨基化聚苯乙烯反应, 构筑了聚苯乙烯(PS)负载的环己基脲(PS-U1)和聚苯乙烯负载的4-三氟甲基苯基脲催化剂(PS-U2). 利用PS-U/KOMe二元催化体系协同催化环内酯的开环聚合. 结果表明, PS-U/KOMe二元体系可高效催化ε-己内酯(ε-CL)、 δ-戊内酯(δ-VL)和L-丙交酯(L-LA)的开环聚合, 制备了低催化剂残留且环境友好的聚酯材料; 同时实现了PS-U的回收及循环利用.

关键词: 负载催化剂, 脲, 开环聚合, 聚酯

Abstract:

To solve the catalyst residual problem, a promising strategy is to immobilize active catalyst on the surface of polymer microspheres to make heterogeneous catalyst. Herein, a metal-free approach to the ring-opening polymerization of lactones using recyclable polystyrene supported urea-potassium methoxide binary catalyst system is described. The new heterogeneous catalysts, polystyrene(PS)-supported cyclohexyl urea (PS-U1) and polystyrene-supported 4-(trifluoromethye) phenyl urea(PS-U2), were prepared by reactions of amine-functionalized PS microspheres with cyclohexyl isocyanate and 4-(trifluoromethyl)phenyl isocyanate, respectively. It was found that PS-U-potassium methoxide catalytic system exhibited high catalytic activity for ring-opening polymerization(ROP) of lactones, including ε-caprolactone(ε-CL), δ-valerolactone(δ-VL) and rac-lactide(rac-LA). In addition, the heterogeneous PS-U could be easily separated via simple filtration and recycled. It is worth noting that the recycled PS-U catalyst could be reused without significant decrease of catalytic activity.

Key words: Heterogeneous catalyst, Urea, Ring-opening polymerization, Polyester

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