Copolymers of ethene and longer chained 1‐olefins such as 1‐octene, 1‐decene, 1‐dodecene, 1‐octadecene and 1‐hexacosene with 8 to 28 carbon atoms were carried out using [Ph2C(2,7)‐ditertBuFlu)(Cp)]ZrCl2/MAO as catalyst. Precisely designed microstructures and activities up to 168 000 kgcopolymer/(molzirconocene·h·mol/lmonomer) can be obtained. There is a remarkable polymerization activity left even after a time of 4 hours. The incorporation of the longer chained 1‐olefins reaches 19 wt% and depends on the chain length and the concentration of the comonomer in the feed, the LLDPE materials prepared show melting points of 129 – 112 °C.
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Kaminsky et al. (2005) studied this question.