Abstract
AbstractThe copolymerization of ethylene (E) with dicyclopentadiene (DCP), ethylidene norbornene (ENB) or methyl endomethylene hexahydronaphthalene (MEHN) by ZIEGLER‐NATTA catalysts in presence of H2 affords low‐mol.‐wt. products over a wide range of unsaturation. In this paper some characteristic features of the copolymerization and some physical properties of the raw products are discussed.For the catalytic system VOCI3‐Al2Et3Cl3 differences in catalyst efficiency, copolymer composition, diene incorporation and viscosity can be seen as a function of type and amount of diene monomer.Physical properties of the copolymers are strongly dependent on composition. Incorporation of dience results in lowered melting points of the parent PE. In case of E‐DCP and E‐ENB the materials become amorphous beyond 15‐20 mole‐% diene. At this composition minimum glass transition temperatures are seen.
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