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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
2017
Source PublicationPOLYMER
ISSN0032-3861
Volume120Issue:-Pages:59-67
Subtype期刊论文
AbstractUnderstanding 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.
KeywordX-ray-diffraction Ultrathin Films Thermal-behavior Polymer-films Crystallization Behavior Correlation Spectroscopy Lamellar Orientation Synchrotron Saxs Single-crystals Co2 Separation
DOI10.1016/j.polymer.2017.05.050
Indexed BySCI
WOS KeywordX-RAY-DIFFRACTION ; ULTRATHIN FILMS ; THERMAL-BEHAVIOR ; POLYMER-FILMS ; CRYSTALLIZATION BEHAVIOR ; CORRELATION SPECTROSCOPY ; LAMELLAR ORIENTATION ; SYNCHROTRON SAXS ; SINGLE-CRYSTALS ; CO2 SEPARATION
Language英语
WOS IDWOS:000404180400007
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28800
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
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.
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