A new methodology for studying multiple‐site‐type catalysts for the copolymerization of olefins

摘要: A novel methodology is presented for studying the nature of multiple-site-type catalysts used synthesis olefin copolymers. Experimental results copolymer composition (short-chain branching) versus molecular weight are obtained by analyzing high-temperature gel-permeation chromatography fractions with Fourier-transform infrared spectroscopy. The distribution deconvoluted to determine number different site types on catalyst. average chains made each type then determined from data. It also shown how extend this comonomer reactivity ratios per type.