Studies on Block Copolymers of Isotactic Polystyrene and Poly(ethene-co-propene)(Ⅰ)──Synthesis of iPS-b-Poly(E-co-P) Block Copolymer

Abstract

Abstract: Sequential copolymerization of styrene with mixture of ethene and propene [iPS-b-Poly (E-co-P)] was carried out with NdClx (OR)y modified Ziegler-Natta Catalystdeveloped in our laboratory.The influence of concentration of catalyst and cocatalyst [Al(i-Bu)₃], polymerization temperature, isospecific prepolymerization time of styrene and feedratio of ethene/propene on the copolymerizations was investigated in great details.Thecontent of lPSsegment in copolymerization product increases with the increasing time of styreneprepolymerization.

Key words: Isotactic polystyrene, Poly(ethene-co-propene), Block copolymerization, Ziegler-Natta catalyst

CLC Number:

O631.5

TrendMD:

CHEN Tian-Hong, LIN Shang-An. Studies on Block Copolymers of Isotactic Polystyrene and Poly(ethene-co-propene)(Ⅰ)──Synthesis of iPS-b-Poly(E-co-P) Block Copolymer[J]. Chem. J. Chinese Universities, 1997, 18(11): 1875.

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Studies on Block Copolymers of Isotactic Polystyrene and Poly(ethene-co-propene)(Ⅰ)──Synthesis of iPS-b-Poly(E-co-P) Block Copolymer

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