ポリエステル系共重合体の融解の熱力学量

抄録

By applying the theoretical equation proposed by the authors for melting of two-component copolymer, the numerical values of heat, h_x, and entropy, s_x, of transition of quasi-crystal per structural unit were estimated for polyethylene-terephthalate/adipate, polyethylene-terephthalate/sebacate, and polyethylene-sebacate/terephthalate copolymers. Comparisons of h_x and s_x with the heat, h_u, and entropy, s_u, of fusion of crystallizable component polymer led to that -CH₂-O- linkages in crystalline sequence of these copolymer backbone chains were twisted from the planer zig-zag conformation more than those in quasi-crystal.