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

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2012年 / 213卷 / 06期

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

页码：643 / 653

页数：11

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