Lanthanum Tris(2,6-di-tert-butyl-4-methylphenolate) as a Novel, Versatile Initiator for Homo- and Copolymerization of Cyclic Carbonates and Lactones
Lanthanum Tris(2,6-di-tert-butyl-4-methylphenolate) as a Novel, Versatile Initiator for Homo- and Copolymerization of Cyclic Carbonates and Lactones
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DOI：
10.1002/1521-3935(20020301)203:4
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发表时间：
2002-03
影响因子：
2.5
通讯作者：
Jun Ling;Zhi-quan Shen
中科院分区：
文献类型：
--
作者：
Jun Ling;Zhi-quan Shen
三（2，6-二叔丁基-4-甲基苯酚）镧是DTC、TMC和CL的均聚以及DTC与CL和与TMC的无规共聚的高活性引发剂。单体插入通过酰基-氧键断裂发生。用GPC、1HNMR和DSC表征了共聚物的无规结构. DTC和CL的竞聚率分别为13.4（rDTC）和0.20（rCL）。
Lanthanum tris(2,6-di-tert-butyl-4-methylphenolate) is reported as a highly active initiator for homopolymerizations of DTC, TMC, and CL as well as random copolymerizations of DTC with CL and with TMC, respectively. The monomer insertion occurs via acyl-oxygen bond cleavage. The random structures of copolymers are identified by GPC, 1 H NMR, and DSC. The reactivity ratios of DTC and CL are measured to be 13.4 (r DTC ) and 0.20 (r CL ), respectively.