Enhanced Stereocomplex Crystallization of Biodegradable Enantiomeric Poly(lactic acid)s by Repeated Casting

被引：85

作者：

Tsuji, Hideto ^{[1
]}

Yamamoto, Satomi ^{[1
]}

机构：

[1] Toyohashi Univ Technol, Grad Sch Engn, Dept Environm & Life Sci, Aichi 4418580, Japan

来源：

MACROMOLECULAR MATERIALS AND ENGINEERING | 2011年 / 296卷 / 07期

基金：

日本学术振兴会;

关键词：

biodegradable polyesters; crystallization; polylactides; repeated casting; stereocomplexes; STAR-SHAPED POLY(L-LACTIDE)S; IN-VITRO HYDROLYSIS; SPHERULITE GROWTH; MORPHOLOGY; CRYSTAL; BLENDS;

D O I：

10.1002/mame.201000397

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Stereocomplex crystallization between PLLA and PDLA is known to be disturbed when their molecular weights increase to >10(5) g.mol(-1). Here, solution casting of PLLA and PDLA with different solvents was performed repeatedly to increase the time for the PLLA/PDLA solution in the concentration range in which only stereocomplex crystallites are formed and thus to elevate the stereocomplex crystallinity in the materials. The results of WAXS and DSC show that for all solvents examined the crystallinities of stereocomplex crystallites and homocrystallites increased and decreased, respectively, with increasing number of castings, indicating that repeated casting is a promising method to enhance stereocomplex crystallization.

引用

页码：583 / 589

页数：7

共 32 条

[1]

Auras R., 2010, POLYLACTIC ACID SYNT

[2]

Biela T, 2002, MACROMOL SYMP, V183, P1, DOI 10.1002/1521-3900(200207)183:1<1::AID-MASY1>3.0.CO

[3]

2-Q

[4] Characterization of star-shaped poly(L-lactide)s by liquid chromatography at critical conditions [J].