Reorientation of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) crystal in thin film induced by polyethylene glycol

doi:10.1016/j.polymer.2017.05.050

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	Reorientation of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) crystal in thin film induced by polyethylene glycol
	Chen, YJ; Park, Y; Yang, CM; Noda, I; Jung, YM
刊名	POLYMER
	2017
卷号	120 期号:-页码:59-67
关键词	X-ray-diffraction Ultrathin Films Thermal-behavior Polymer-films Crystallization Behavior Correlation Spectroscopy Lamellar Orientation Synchrotron Saxs Single-crystals Co2 Separation
ISSN号	0032-3861
DOI	10.1016/j.polymer.2017.05.050
文献子类	期刊论文
英文摘要	Understanding the crystal structure and thermal behavior of poly(3-hydroxybutyrate-co-3hydroxyhexanoate) (PHBHx) and its blends thin film under spatial confinement is crucial for its application in molecular scale devices and advanced nanotechnology. In this study, we investigate the influence of polyethylene glycol (PEG) on the morphology and molecular orientation of PHBHx thin films using scanning probe microscope and grazing-incidence wide-angle X-ray scattering. Unexpectedly, we found that with addition of PEG no hydrogen bonds were detectable in the thin film of PHBHx/PEG blend. PEG destroyed the edge-on lamellar orientation of PHBHx leading to the chain axis to pack preferentially in a direction between the out-of-plane and in-plane along with a flat surface. More importantly, analysis of the q space of (020) diffraction indicated that PHBHx crystal tends to form a densely packed lamellae after the addition of PEG. The thermal behaviors of such densely packed lamellae crystals were examined by temperature-dependent infrared-reflection absorbance spectroscopy and two-dimensional correlation analysis. It was revealed that the crystal structure of PHBHx/PEG blends were stable during the melting process despite the decrease of the crystallinity. We speculate that the reorientation and thermal stability of the crystalline PHBHx/PEG blends were due to PEG acting as an effective solvent that not only lowered the surface energy of chain folding surface but also changed the kinetics of PHBHx crystallization. This interesting observation will provide new insights into understanding of the crystallization kinetics of PHBHx thin film under spatial confinement.(C) 2017 Elsevier Ltd. All rights reserved.
WOS关键词	X-RAY-DIFFRACTION ; ULTRATHIN FILMS ; THERMAL-BEHAVIOR ; POLYMER-FILMS ; CRYSTALLIZATION BEHAVIOR ; CORRELATION SPECTROSCOPY ; LAMELLAR ORIENTATION ; SYNCHROTRON SAXS ; SINGLE-CRYSTALS ; CO2 SEPARATION
语种	英语
WOS记录号	WOS:000404180400007
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/28800]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Chen, YJ,Park, Y,Yang, CM,et al. Reorientation of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) crystal in thin film induced by polyethylene glycol[J]. POLYMER,2017,120(-):59-67.
APA	Chen, YJ,Park, Y,Yang, CM,Noda, I,&Jung, YM.(2017).Reorientation of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) crystal in thin film induced by polyethylene glycol.POLYMER,120(-),59-67.
MLA	Chen, YJ,et al."Reorientation of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) crystal in thin film induced by polyethylene glycol".POLYMER 120.-(2017):59-67.