Effects of blending poly(D,L-lactide) with poly(ethylene glycol) on the higher-oder crystalline structures of poly(ethylene glycol) as revealed by small-angle X-ray scattering

被引：4

作者：

Tien, N. D. ^{[1
]}

Hoa, T. P. ^{[2
]}

Kimura, G. ^{[1
]}

Yamashiro, Y. ^{[1
]}

Fujiwara, H. ^{[1
]}

Mochizuki, M. ^{[3
]}

Sasaki, S. ^{[1
]}

Sakurai, S. ^{[1
,3
]}

机构：

[1] Kyoto Inst Technol, Dept Biobased Mat Sci, Sakyo Ku, Kyoto 6068585, Japan

[2] Hanoi Univ Technol, Ctr Polymer, Hanoi, Vietnam

[3] Kyoto Inst Technol, Ctr Fiber & Textile Sci, Kyoto, Japan

来源：

FUTURE TRENDS IN SOFT MATERIALS RESEARCH WITH ADVANCED LIGHT SOURCES | 2011年 / 272卷

关键词：

POLY(L-LACTIC ACID); THERMAL CHARACTERIZATION; POLY(LACTIC ACID); MOLECULAR-WEIGHT; BLOCK-COPOLYMER; POLYMER BLENDS; BINARY MIXTURE; OXIDE); MICRODOMAINS;

D O I：

10.1088/1742-6596/272/1/012007

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Effects of blending poly(lactic acid) (PLA) with poly(ethylene glycol) (PEG) on higher-order crystalline structures of PEG were examined using small-angle X-ray scattering (SAXS). For this purpose, the fact that two polymers are both crystalline makes situtation much complicated. To simplify, non-crystalline PLA is suitable. Thus, we used poly(D,L-lactic acid) (DLPLA), which is random copolymer comprising D- and L-lactic acid moieties. Multiple scattering peaks arising from the regular crystalline lamellar structure were observed for the PEG homopolymer and the blends. Surprisingly, the structure is much more regular for the blend DLPLA/PEG at composition of 20/80 wt.% than for the PEG homopolymer. Also for this blend sample as well as for a PEG. homopolymer, very peculiar SAXS profiles were observed just 1 C below T,, of PEG. This is found to be a particle scattering of plate-like objects, which has never been reported for polymer blends or crystalline polymers. Futhermore, it was found that there was strong hysteresis of the higher-order structure formation.

引用

页数：7

共 22 条

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