ELIMINATION OF 3-DIMENSIONAL ORDER IN THERMOTROPIC COPOLYESTERS

Previous work has shown that crystallization is suppressed in some the rmotropic copolyesters containing between five and seven different uni ts of different types (rod-like, crankshaft and rigid angular). Howeve r, no general rules for design of such copolymers could be formulated. It is now found that crystallizability of random copolyesters is rela ted to probabilities of tetrads forming crystallizable sequences. Rela tionships for calculating the probabilities of such tetrads in random multicomponent copolyesters are derived. A criterion for design of non -crystalline copolyesters is formulated.