MELT BLENDS OF AMORPHOUS CYCLOOLEFIN POLYMERS AND PARTIALLY CRYSTALLINE CYCLOOLEFIN ELASTOMERS WITH IMPROVED TOUGHNESS

摘要

A melt-blend resin composition prepared by melt-blending includes from 60 parts to 99 parts per hundred weight resin in the blend of an amorphous cycloolefin polymer composition exhibiting a glass transition temperature in the range of from 30°C to 200°C; and from 40 parts to 1 part per hundred weight resin in the blend of a partially crystalline, cycloolefin elastomer of norbornene and ethylene preferably having a glass transition temperature in the range of from -10°C to 15°C and a crystalline melting temperature in the range of from 60°C to 125°C and a % crystallinity by weight in the range of from 5% to 40%. The partially crystalline, cycloolefin elastomer optionally has a second glass transition temperature at less than -90°C.