Abstract
Copolymerization of styrene with styrene-terminated polyisoprene macromonomer (SIPM) by titanium compounds in combination with methylaluminoxane (MAO) was investigated. SIPM having high end functionality and narrow molecular weight distribution was prepared by reaction of the living polyisoprene initiated with sec-butyllithium (s-BuLi) and p-chloromethyl styrene. CpTiCl 3 MAO catalyst (Cp: cyclopentadienyl) was found an effective catalyst for the synthesis of well-defined syndiotactic graft copolymer. The amount of incorporated SIPM in the graft copolymer could he controlled by the SIPM charged. The melting point of the syndiotactic graft copolymers decreased with increasing the number of SIPM per molecules.
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