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