Synthesis of Heat-resistant Copolymers by Atom Transfer Radical Polymerization

Abstract

Abstract: Atom transfer radical copolymerization(ATRP) of styrene(St) and N-cyclohexylmaleimide(NCMI) with the CuBr/bpy catalyst in anisole, initiated by 1-phenylethyl bromide(1-PEBr) or tetra-(bromomethyl)benzene(TBMB), afforded well defined copolymer with predetermined molecular weights and low polydispersities, M_w/M_n<1.5. Other monomer pairs such as methyl methacrylate(MMA)/NCMI, St/N-phenylmaleimide, MMA/ N-phenylmaleimide were studied, too. The influences of several factors, such as temperature, solvent and monomer's ratio on the copolymerization with the CuBr/bpy catalyst system were subsequently investigated. The apparent activation energy of St(MMA)and NCMI was deduced from the kinetics figure of different temperatures. Using TBMBas the initiator produced four-armed star copolymer. The heat resistance of the resultant copolymer has been improved by increasing the NCMI.

Key words: ATRP, “Living”/controlled radical polymerization, N-Substituted maleimide, Heat-resistance, Copolymerization

CLC Number:

O631

TrendMD:

JIANG Xu-Lin, YAN De-Yue, LIU Wan-Li . Synthesis of Heat-resistant Copolymers by Atom Transfer Radical Polymerization[J]. Chem. J. Chinese Universities, 2000, 21(10): 1613.

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Synthesis of Heat-resistant Copolymers by Atom Transfer Radical Polymerization

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