Syntheses and Characterization of Block Copolymers sPS-b-Poly(S-co-E)

Abstract

Abstract: The syndio polystyrene-b-poly(styrene-co-ethene) block copolymers were synthe-sized with η⁵-cyclopentadi-enyltrifurfuryloxyl titanium(cat-1)/MAO and η⁵-cyclopentadienyltribenzyloxyl-titanium(cat-2)/MAO catalytic systems. The effect of styrene prepolymer-ization time on catalytic efficiency was investigated. The results showed that total catalytic efficiency raised with the increasing of styrene prepolymerization time. The sPS-b-Poly(Sco-E) block copolymers were obtained by butanone extraction fractionation. The sPS-b-Poly(Sco-E) block copolymers accounted for 30%～50% of the total copolymerization products. The ethene segment content in block copolymers was 9%～14%. The block copolymers were characterized by DSC, WAXD, FTIR, ¹³CNMR and polarized micrograph methods.

Key words: Block coplymerization, sPS-b-Poly(S-co-E), Characterization

CLC Number:

O631.2

TrendMD:

WANG Zheng-Hui, LIN Shang-An . Syntheses and Characterization of Block Copolymers sPS-b-Poly(S-co-E)[J]. Chem. J. Chinese Universities, 1999, 20(7): 1148.

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Syntheses and Characterization of Block Copolymers sPS-b-Poly(S-co-E)

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