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Lanthanum Tris(2,6‐di‐ tert ‐butyl‐4‐methylphenolate) as a Novel, Versatile Initiator for Homo‐ and Copolymerization of Cyclic Carbonates and Lactones
Author(s) -
Ling Jun,
Shen Zhiquan
Publication year - 2002
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20020301)203:4<735::aid-macp735>3.0.co;2-w
Subject(s) - copolymer , polymer chemistry , monomer , chemistry , reactivity (psychology) , lanthanum , tris , branching (polymer chemistry) , polymer , organic chemistry , medicine , biochemistry , alternative medicine , pathology
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.