THE EFFECTS OF HYDROGEN-BONDING ON THE MISCIBILITY, COMPLEXATION AND CRYSTALLIZATION IN BLENDS OF CRYSTALLINE AND AMORPHOUS COMPONENTS

The miscibility and crystallization of blends of o-[p-(2,2,2-trifluoro -1-hydroxy-1-trifluoromethyl) ethyl)-alpha-methylstyrene]} (PS(OH)) an d polycaprolactone (PCL) have been investigated by viscometry and diff erential scanning calorimetry. With increasing the hydroxyl content in PS(OH), the transitions from immiscibility to miscibility and then to complexation can be realized. Depending on the states in which the bl ends exist, a different behavior of PCL crystallization is observed. C rystallization in the immiscible blends, is almost not affected by the presence of PS(OH). In the miscible blends, an apparent depression of crystallization is observed. Particularly, for the blends with a hydr oxyl content larger than 8 mol-% in PS(OH), complete depression of PCL crystallization is found, which can be attributed to a complex formed by pairing segments of PCL and PS(OH).