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稀土膦酸酯盐-烷基铝体系催化正辛基异氰酸酯配位聚合

杨雄发, 倪旭峰, 沈之荃   

  1. 浙江大学高分子科学研究所, 高分子合成与功能构造教育部重点实验室, 杭州 310027
  • 收稿日期:2006-01-24 修回日期:1900-01-01 出版日期:2006-08-10 发布日期:2006-08-10
  • 通讯作者: 沈之荃

Coordination Polymerization of n-Octyl Isocyanate Catalyzed by Rare Earth Phosphonate/Alkylaluminium System

YANG Xiong-Fa, NI Xu-Feng, SHEN Zhi-Quan   

  1. Institute of Polymer Science, Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Zhejiang University, Hangzhou 310027, China
  • Received:2006-01-24 Revised:1900-01-01 Online:2006-08-10 Published:2006-08-10
  • Contact: SHEN Zhi-Quan

摘要: 报道了由稀土膦酸酯盐-烷基铝组成的催化体系在温和条件下催化正辛基异氰酸酯(n-OctNCO)的配位聚合特征. 研究发现, 以Nd(P204)3/Al(i-Bu)3组成的稀土催化体系是正辛基异氰酸酯聚合的良好催化剂. 系统考察了正辛基异氰酸酯在该催化体系下的本体、溶液聚合的聚合规律和溶液聚合反应动力学. 用1H NMR, FTIR, DSC, TGA和GPC等分析测试手段对所得到的聚合物进行了表征.

关键词: 稀土膦酸酯盐, 正辛基异氰酸酯, 配位聚合

Abstract: Coordination polymerization of n-octyl isocyanate catalyzed by rare earth phosphonate catalyst Nd(P204)3 using Al(i-Bu)3 as cocatalyst was carried out at -10 ℃ to obtain poly(n-octyl isocyanate) with a high molecular weight and narrow molecular weight distribution. Under the optimal polymerization conditions: n(Al)/n(Nd)=10 aging at 50 ℃ for 5 h, n(n-OctNCO)/n(Nd)=100, polymerized at -10 ℃ for 10 h in bulk, producing a polymer with 88.3% yield, Mn=38.9×104, and MWD=3.53. The kinetics and mechanism of the polymerization were investigated.

Key words: Rare earth phosphonate, n-Octyl isocyanate, Coordination polymerization

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