| 摘要 |
PURPOSE: The title copolymer having excellent physical properties such as bending elastic modulus and impact resistance while reducing process temperature by copolymerizing styrene and p-tertiary butylstyrene, and good bond strength with other components by introducing a functional polymer is provided, which can process even at low temperatures of less than 300 deg.C and has physical properties equal to or much superior to styrene homopolymers regardless of a decrease in melting point. CONSTITUTION: The copolymer comprising (A) 90 to 99% by mole of styrene and (B) a repeating unit of formula (1) derived from 0.01 to 10% by mole of p-tertiary butylstyrene and having a weight average molecular weight of 10,000 to 1,000,000 and a syndiotactic stereoregularity of 90% or more is prepared by polymerization of 90 to 99% by mole of styrene and 0.01 to 10% by mole of p-tertiary butylstyrene in a catalytic system comprising a transition metal compound of formula: MR1aR2bR3cR440(a+b+c) or M1R1dR2eR33-(d+e) and an organic aluminium compound or aluminoxane of formula: -(-Al-R5-O-)j.
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