HIGH-RESOLUTION TEM OF THE MELT-CRYSTALLIZED MODIFICATION OF SYNDIOTACTIC POLYSTYRENE

The melt-crystallized orthorhombic modification of syndiotactic polyst yrene (s-PS) was investigated by transmission electron microscopy. Sin gle crystals of the beta' modification were prepared from a thin film by melt crystallization at 240 degrees C. Their high-resolution images viewed along the molecular stem axis were successfully obtained, from which images the lateral arrangement of the individual molecular stem s in the modification can be read out. The ''faulted'' structure defin ed in our previous papers seems to hold a majority in the beta' modifi cation, to make a different ''ordered'' structure. (C) 1998 Elsevier S cience Ltd. All rights reserved.