Stereocomplexes from Biosourced Lactide/Butylene Succinate-Based Copolymers and Their Role as Crystallization Accelerating Agent

被引:13
作者
Mincheva, Rosica [1 ]
Raquez, Jean-Marie [1 ]
Lison, Valerie [1 ]
Duquesne, Emmanuel [2 ]
Talon, Olivier [2 ]
Dubois, Philippe [1 ]
机构
[1] Univ Mons UMONS, Lab Polymer & Composite Mat, Ctr Innovat & Res Mat & Polymers CIRMAP, B-7000 Mons, Belgium
[2] Mat Nova ASBL, B-7822 Ghislenghien, Belgium
关键词
crystallization; enantiomeric copoly(ester urethane)s; polycondensation; poly(L-lactic acid); stereocomplexes; POLYLACTIDE; BEHAVIOR;
D O I
10.1002/macp.201100620
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Biosourced co(polyester urethane)s containing different ratios of enantiomeric oligo(L- or D- lactide) (OLLA/ODLA) sequences and oligo(butylene succinate) (OBS) blocks (P(OD(L)LA-b-OBS)) are synthesized. Their stereocomplexation is confirmed by differential scanning calorimetry and X-ray diffraction. The process is efficient independently on the OLA/OBS ratio and for OLLA/ODLA ratios from 2:3 to 3:2. The preformed stereocomplexes show remarkable crystallization accelerating efficiency when melt-blended with a commercial PLLA in amounts from 2.5 to 10 wt%. Spectacular increase in the polyester matrix crystallinity (from 2 up to 42%) and crystallization rate (half-time of ca. 3 min compared to ca. 30 min for the neat PLLA) is observed.
引用
收藏
页码:643 / 653
页数:11
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