NDLI: 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

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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

Content Provider	Scilit
Author	Tien, N. D. Hoa, T. P. Kimura, G. Yamashiro, Y. Fujiwara, H. Mochizuki, M. Sasaki, S. Sakurai, S.
Copyright Year	2011
Description	Journal: Journal of Physics: Conference Series 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 $T_{m}$ 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.
Related Links	http://iopscience.iop.org/article/10.1088/1742-6596/272/1/012007/pdf
ISSN	17426588
e-ISSN	17426596
DOI	10.1088/1742-6596/272/1/012007
Journal	Journal of Physics: Conference Series
Issue Number	1
Volume Number	272
Language	English
Publisher	IOP Publishing
Publisher Date	2011-01-01
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Conference Series Small Angle X Ray Scattering Structure Formation
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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