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Synthesis of Poly( ϵ ‐caprolactone‐ co ‐methacrylic acid) Copolymer via Phosphazene‐Catalyzed Hybrid Copolymerization
Author(s) -
Xu Jinbao,
Yang Hongjun,
Zhang Guangzhao
Publication year - 2013
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/macp.201200510
Subject(s) - copolymer , polymer chemistry , phosphazene , methacrylic acid , caprolactone , monomer , thermogravimetric analysis , chemistry , differential scanning calorimetry , materials science , polymer , organic chemistry , physics , thermodynamics
Abstract Poly( ϵ ‐caprolactone‐ co ‐ tert ‐butyl methacrylate) (CL‐ co ‐BMA) random copolymer is synthesized via hybrid copolymerization with 1‐ tert ‐butyl‐4,4,4‐tris(dimethylamino)‐2,2‐bis[tris(dimethylamino)phophoranylidenamino]‐2Λ5,4Λ5‐catenadi(phosphazene) ( t ‐BuP 4 ) as the catalyst. The copolymer is hydrolyzed into poly( ϵ ‐caprolactone‐ co ‐methacrylic acid) (CL‐ co ‐MAA), a charged copolymer. Nuclear magnetic resonance, Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis measurements indicate that cyclic ester and vinyl monomer form a random copolymer. The degradation of the copolymers has also been studied by use of quartz crystal microbalance with dissipation.