ABSTRACT
I. INTRODUCTION The nature o f the intermolecular interactions, or the energy level at which the molecules interact with each other, and the manner in which these interactions in duce molecular orientation determine polymer properties. The differences in molecular mobility between the macromolecules with various chemical constitu tions or segments o f the polymer chains may result in phase separation or create the condition for the formation o f the various types o f supermolecular structures, including the highly oriented forms. As is commonly known, there is a variety of morphologies o f semicrystalline polymers that directly influence the physical and functional properties o f this group o f polymers. The relation between the molec ular mobility o f macromolecular segments and the structure and intrinsic proper ties is manifested in block copolymers and liquid crystalline polymers.
