Separate Crystallization and Cocrystallization of Poly(L‐lactide) in the Presence of L‐Lactide‐Based Copolymers With Low Crystallizability,Poly(L‐lactide‐co‐glycolide) and Poly(L‐lactide‐co‐D‐lactide) |
| |
| Authors: | Hideto Tsuji Kohji Tashiro Leevameng Bouapao Makoto Hanesaka |
| |
| Affiliation: | 1. Department of Environmental and Life Sciences, Graduate School of Engineering, Toyohashi University of Technology, Tempaku‐cho, Toyohashi, Aichi 441‐8580, Japan;2. Department of Future Industry‐oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute, Hisakata, Tempaku, Nagoya 468‐8577, Japan |
| |
| Abstract: | Poly(L ‐lactide) (PLLA) and poly(L ‐lactide‐co‐glycolide) (78/22)0 [P(LLA‐GA)] were phase‐separated in PLLA/P(LLA‐GA) blends, forming independent domains and thence crystallizing separately. The crystallization of PLLA was not disturbed or delayed by the presence of P(LLA‐GA) and vice versa. PLLA and poly(L‐lactide‐co‐D ‐lactide) (77/23) [P(LLA‐DLA)] were miscible in the PLLA/P(LLA‐DLA) blends, overall crystallization was delayed, and the growth of crystallites was disturbed in the presence of P(LLA‐DLA). In isothermal crystallization, the originally noncrystallizable P(LLA‐DLA) became crystallizable in the presence of PLLA, with which it cocrystallized. The disturbance effect on periodical lamella twisting of PLLA was larger for P(LLA‐GA) than for P(LLA‐DLA). |
| |
| Keywords: | blends crystallization morphology polyesters poly(lactic acid) |
|
|
