VISCOSITY OF POLY(ETHYLENE-α-OLEFINS) AND THEIR CROSSLINK

摘要

This study examined the viscosity of various poly(ethylene-α-olefins), their crosslinks and thermal properties. The rheological behaviors of various poly(ethylene-α-olefins) were investigated by a rheometer. In addition, a cure rheometer and solvent extraction was used to study the progress of the crosslinking reaction for poly(ethylene-α-olefins). The thermal property was also studied using a differential scanning calorimeter. Experimental result demonstrated that the higher the molecular weight, the higher the degree of crosslinking. To explain this phenomenon, three different reaction mechanisms were proposed. Based on the above discussion, the high molecular weight and octene favored the crosslink formation. In particular, the influence of molecular weight on the crosslink formation was dominant. Moreover, from the DSC curve, the heat of fusion of crosslinked PE4 decreased with an increase of crosslinking time. It also indicated that the heat of fusion for extracted crosslinked PE4 was slightly lower than that for crosslinked PE4.