An immobilized/soluble hybrid catalyst system for atom transfer radical polymerization
An immobilized/soluble hybrid catalyst system for atom transfer radical polymerization
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DOI：
10.1021/ma0101052
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发表时间：
2001-07-17
期刊：
影响因子：
5.5
通讯作者：
Matyjaszewski, K
中科院分区：
文献类型：
--
作者：
Hong, SC;Paik, HJ;Matyjaszewski, K
将一种新的双组分催化剂体系应用于原子转移自由基聚合（ATRP），该体系由固载化催化剂和可溶性催化剂组成。在甲基丙烯酸甲酯和丙烯酸甲酯的ATRP中，单体转化率高（>90%），具有预定的分子量和窄的分子量分布（M-w/M-n = 1.1-1.3）。通过过滤或沉降程序除去固定化的催化剂。反应溶液的流延得到透明和无色的聚合物膜。通过电感耦合等离子体（ICP）分析确认，所得聚合物中的Cu残留量低至20 ppm。
A new two-component catalyst system consisting of an immobilized catalyst and a soluble catalyst in ppm quantities was applied to atom transfer radical polymerization (ATRP). A high conversion of monomer (>90%) was achieved with a predetermined molecular weight and narrow molecular weight distribution (M-w/M-n = 1.1-1.3) in the ATRP of methyl methacrylate and methyl acrylate. The immobilized catalyst was removed by a filtration or sedimentation procedure. The casting of the reaction solution afforded clear and colorless polymer films. It was confirmed by the inductively coupled plasma (ICP) analysis that the residual amount of Cu in the resulting polymer was as low as 20 ppm.