| Abstract: | The asymmetric lactone (3 S, 4 R)-3-methyl-4-benzyloxycarbonyl-2-oxetanone ( 6 ) was anionically polymerized to give an insoluble, crystalline, highly isotactic polymer with (2 S, 3 S)-benzyl β-3-methylmalate repeating units. Solubility was achieved by copolymerization of 6 with the recemic (R, S)-butyl malolactonate ( 7 ). The semicrystalline copolymer was characterized (M?n = 107 000, Tg = 29,6°C, Tm = 161°C, α] = 1,5 deg · dm?1 · g?1 · cm3) and its stereosequence investigated by 13C NMR. |
