Polylactide. II. Viscosity–molecular weight relationships and unperturbed chain dimensions

摘要: Mark–Houwink equations for benzene and chloroform solutions of S-polylactide racemic polylactide were established by end-group analysis partly hydrolyzed polymers. Unperturbed chain dimensions calculated both polymers reveal a considerable difference suggest helical conformation in solution. This finding supports 1H-NMR observations that chemical shift differences appear when the same configurational sequence is present two stable conformational states.