Influence of the Type and the Comonoemr Contents on the Mechanical Behavior of Ethylene/#alpha#-Olefin Compolymers

摘要

The influences of the type of concentration of #alpha#-olefin (1-hexene, 1-octene, 1-decene, 1-octadecene, 4-methyl-1-pentene) on the mechanical behavior and crystallinity degree of some ethylene/#alpha#-olefin copolymers obtained by metallocene catalysts were stuided by means of stress/strain experiments. The crystallinity degree of these copolymers has been determined by X-ray measurements. It has been observed that the copolymers show less resistance to strain as the comonomer content increases and the crystallinity decreases. Most of the stuided copolymers exhibit significant increase in the crystallinity level after the stress/strain experiments.