然而，两亲嵌段共聚物的传统的制备方法是有机金属催化剂催化的活性离子聚合法，故产物中难免会残留有毒的有机金属催化剂。
At present, block copolymers containing PCL and PEG chains are mainly prepared by active ionic polymerization using traditional chemical catalysts, some toxic organometallic compounds.
在金属催化剂的作用下，以烯烃和含氢硅油为原料，利用硅氢加成反应合成有机硅蜡。
Silicone waxes were hydrosilylated from polyhydrosiloxane and olefins in the presence of metal catalyst.
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