Morphology and crystal structure of cold-crystallized syndiotactic polystyrene

Scanning electron microscopy, differential scanning calorimetry, IR spectro scopy, and X-ray diffraction analyses were used to characterize the unique morphology of cold-crystallized syndiotactic polystyrene (sPS). Cold-crysta llization of sPS produced only ct-type unit cell packed into crystalline do mains of different morphologies. The morphology contains a granular-sphere texture when cold-crystallized at low temperatures while high-temperature c old-crystallization produced additional sheaf-like lamella radiating out fr om the central spheres. Details of this interesting morphological feature a re expounded in the paper. (C) 2000 Elsevier Science Ltd. All rights reserv ed.