Synthesis and Characterization of Gradient Copolymer Composed of Styrene and Methyl Methacrylate in Water Dispersion System

Abstract

Abstract: The controllability as well as the monomer reactivity for the atom transfer radical copolymerization of styrene（St） and methyl methacrylate（MMA） in water dispersion system was examined with ethyl 2-bromoisobutyrate as the initiator,CuBr/CuBr₂/1,10-phenanthroline as catalyst and sodium laurylsulfonate as surfactant,respectively. The gradient copolymerization of St and MMA was performed in the water dispersion system with continuous addition of the second monomer MMA into the copolymerization system. The experimental results showed that the water dispersion gradient copolymerization proceeded in a living fashion,producing well-defined copolymers with narrow polydispersities and controlled molecular weights. The increase of the cumulative composition and instantaneous composition of MMA unit along the copolymer chain length demonstrated that the gradient copolymer composed of St and MMA was successfully synthesized in such a water dispersion system.

Key words: Atom transfer radical polymerization, Water dispersion system, Gradient copolymer, Styrene, Methyl methacrylate

CLC Number:

O632

TrendMD:

ZHANG Bin, ZHANG Zhao-Bin, WAN Xiao-Long, HU Chun-Pu , YING Sheng-Kang. Synthesis and Characterization of Gradient Copolymer Composed of Styrene and Methyl Methacrylate in Water Dispersion System[J]. Chem. J. Chinese Universities, 2004, 25(6): 1170.

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Synthesis and Characterization of Gradient Copolymer Composed of Styrene and Methyl Methacrylate in Water Dispersion System

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