Temperature rising elution fractionation of a random ethene/styrene copolymer

Abstract

Abstract A random ethene/styrene copolymer containing 13.8 mol‐% styrene was prepared with the Ziegler‐Natta catalyst system Me 2 Si(Me 4 Cp)(N‐ t ‐butyl)TiCl 2 /methylaluminoxane and characterized by means of preparative t emperature r ising e lution f ractionation (TREF) combined with size exclusion chromatography, NMR, differential scanning calorimetry and wide‐angle X‐ray scattering analyses of the copolymer fractions. Efforts are made to describe the distribution of the styrene content of the copolymers using the Stockmayer‐Tacx distribution function. Both, comonomer distribution and molar mass distribution strongly support the presence of a single type of catalytically active center.