| ATR-FTIR studies on the effect of thickness on the crystallization of poly(3-hydroxybutyrate) thin films | |
| Wang, Z ; Yang, R ; Xu, J ; Xie, XM | |
| 2010-05-07 ; 2010-05-07 | |
| 关键词 | PHB thin films substrate molecular orientation ATR-FTIR GLASS-TRANSITION TEMPERATURE IN-SITU FTIR POLYMER BLENDS POLY(ETHYLENE OXIDES) SPECIMEN THICKNESS OXIDIZED SILICON ULTRATHIN FILMS KINETICS POLY(BETA-HYDROXYBUTYRATE) SPECTROSCOPY Polymer Science |
| 中文摘要 | The crystallization of poly (3-hydroxybutyrate) (PHB) thin films was observed in situ by ATR (attenuated total reflection)-FTIR. The PHB films with different thickness were prepared by means of spin-coating on Al substrates,and then the isothermal crystallization of the PHB films at 20 degrees C was investigated in situ by ATR-FTIR. The results revealed that the crystallization kinetics of PHB films was affected obviously by the film thickness. A reduction in the crystallinity as well as in the rate of crystallization was found with decreasing the film thickness, because the crystallization occurred under constrained geometry conditions. In addition, the effect of film thickness on the orientation of the molecules of the PHB crystals in the films was investigated by polarized ATR-FTIR. The results imply a preferred orientation of the polymer chain axis in the crystals along the surface-normal direction of the films. The thinner the film thickness, the more the preferred crystalline chain orientation perpendicular to the film surface is. |
| 语种 | 中文 ; 中文 |
| 出版者 | SCIENCE PRESS ; BEIJING ; 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/17491]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | Wang, Z,Yang, R,Xu, J,et al. ATR-FTIR studies on the effect of thickness on the crystallization of poly(3-hydroxybutyrate) thin films[J],2010, 2010. |
| APA | Wang, Z,Yang, R,Xu, J,&Xie, XM.(2010).ATR-FTIR studies on the effect of thickness on the crystallization of poly(3-hydroxybutyrate) thin films.. |
| MLA | Wang, Z,et al."ATR-FTIR studies on the effect of thickness on the crystallization of poly(3-hydroxybutyrate) thin films".(2010). |
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