Processing of norbornene thermoplastic materials and articles made therefrom

摘要

The present invention relates to the processing of thermoplastic compositions containing or consisting of thermoplastic saturated norbornene polymers containing not more than 3 wt% volatiles. The thermoplastic composition is pelletised by melt extrusion and dried at a high temperature, preferably from 5 to 30 DEG C below the glass transition temperature of the norbornene polymer for 1 hour or more. This procedure is found to prevent formation of microvoids in the resultant composition, and articles made from it by moulding.