Distribution of the Longest Ethylene Sequence in Ethylene/α-Olefin Copolymers Synthesized with Single-Site-Type Catalysts

We present an analytical solution for Monte Carlo simulations of the microstructure of ethylene/α-olefin copolymers synthesized using single-site catalysts. The bivariate distribution and the longest ethylene sequence (LES) distribution in number and weight are derived for this system. All the results were compared with Monte Carlo simulations and the validity of the LES distribution is verified. We expect these results to be a first step towards the modeling of the fractionation processes in temperature-rising elution fractionation (TREF) and crystallization analysis fractionation (CRYSTAF) and the understanding of structure–properties relationships of these copolymers.