首页> 外文期刊>Macromolecular chemistry and physics >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)
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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)

机译:在低结晶度的L-丙交酯基共聚物,聚L-丙交酯-乙交酯和L-丙交酯-D-丙交酯的存在下,聚L-丙交酯的单独结晶和共结晶

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摘要

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).
机译:在PLLA / P(LLA-GA)共混物中将聚L-丙交酯(PLLA)和聚L-丙交酯-乙交酯乙交酯(78/22)0 [P(LLA-GA)]相分离,形成独立的域,因此分别结晶。 PLA的结晶不受P(LLA-GA)的存在干扰或延迟,反之亦然。 PLLA和聚(L-丙交酯-共-D-丙交酯)(77/23)[P(LLA-DLA)]在PLLA / P(LLA-DLA)共混物中可混溶,延迟了整个结晶过程, P(LLA-DLA)存在下微晶受到干扰。在等温结晶中,最初不可结晶的P(LLA-DLA)在PLLA存在下可结晶,并与之共结晶。 P(LLA-GA)对PLLA周期性片状扭曲的干扰作用大于P(LLA-DLA)。

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