Polyolefins cyclic comonomers

This new family of polyolefin copolymers hcis a significantly different chain microstructure than conventional LLDPE.The single site characteristics of metallocenes, with the catalyst site being identical, are known to produce materials having the most probable molecular weight distribution /M 2.0), with essentially a random comonomer distribution and narrow composition distribution. The comonomers most frequently used commercially are butene, hexene, and octene. Copolymerization of ethylene with 4-methyl-l-penetene (4-MP-l) and cyclic and bicylic groups has been also reported in the literature. Several terpolymers are also commercially available.Exxon Chemical Company manufactures ethylene-butene copolymers, ethylene-hexene copolymers, and terpolymers of butene and hexene comonomers. Exxon markets these mLLDPEs under the trademark name of... 

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