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论文类型：期刊论文

发表时间：2011-12-27

发表刊物：MACROMOLECULES

收录刊物：Scopus、SCIE

卷号：44

期号：24

页面范围：9882-9886

ISSN号：0024-9297

摘要：The synthesis of degradable brush copolymers with well-defined structure and nearly 100% grafting density through grafting from method via living alternating copolymerization of CO 2/VCHO, thiol-ene click reaction and ROP of   -CL was reported. The kinetic of CO 2/VCHO copolymerization catalyzed by the (salen)Co(III)-Cl complex ([Co]/[VCHO] = 1:2000, 20  C and 2.0 MPa) was investigated by sampling at each 30 min with a high pressure sample collecting device. The (salen)Co(III) Cl complex-catalyzed CO 2/VCHO copolymerization was carried out with a [Co]/[VCHO] molar ratio of 1: 200 at 25  C in a predried autoclave at CO 2 pressure of 5.0 MPa for 6.0 h. VCHO and the catalyst were also predried completely. The brush copolymers showed relatively large space between two PCL side chains, which may be favorable to the formation of cavity for the accommodation of small molecules and present a clear superiority in potential application as biomedical materials with respect to traditional linear CO 2/epoxide copolymer.