Effects of electron irradiation on poly(vinylidene fluoride-trifluoroethylene) copolymers studied by solid-state nuclear magnetic resonance spectroscopy
文献类型：期刊论文
| 作者 | Wang, LY; Zhao, XZ; Feng, JW |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
 |
| 出版日期 | 2006-06-15 |
| 卷号 | 44期号:12页码:1714-1724 |
| 关键词 | electron beam irradiation ferroelectricity magic-angle spinning (MAS) NMR phase transition poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] |
| 英文摘要 | The effects of electron irradiation on the molecular chemical structure, conformation, mobility, and phase transition of vinylidene fluoride (VDF) and trifluoroethylene (TrFE) copolymer have been investigated with variable-temperature, solid-state F-19 nuclear magnetic resonance (NMR). It has been found that electron irradiation converts all-trans conformations of both VDF-rich and TrFE-containing segments into dynamically mixed trans-gauche conformations accompanied by a simultaneous ferroelectric-to-paraelectric (or amorphous) transition. The variable-temperature F-19 magic-angle-spinning spectra results show that the paraelectric phase melts at much lower temperatures in irradiated films than in an unirradiated sample. Moreover, F-19 NMR relaxation data (spin-lattice relaxation times in both the laboratory and rotating frames) reveal that electron irradiation enhances the molecular motion in paraelectric regions, whereas the molecular motion in a high-temperature amorphous melt (> 100 degrees C) is more constrained in irradiated films. Besides these physical changes, electron irradiation also induces the formation of several CF3 groups. (c) 2006 Wiley Periodicals, Inc. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Polymer Science |
| 研究领域[WOS] | Polymer Science |
| 关键词[WOS] | FLUORIDE-TRIFLUOROETHYLENE COPOLYMERS ; FERROELECTRIC PHASE-TRANSITION ; INDUCED CROSS-LINKING ; VINYLIDENE FLUORIDE ; POLYVINYLIDENE FLUORIDE ; MOLAR CONTENT ; CO-POLYMERS ; DRAWN FILMS ; F-19 MAS ; NMR |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000237982900008 |
| 公开日期 | 2015-07-28 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/4807]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 2.Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China 3.Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, LY,Zhao, XZ,Feng, JW. Effects of electron irradiation on poly(vinylidene fluoride-trifluoroethylene) copolymers studied by solid-state nuclear magnetic resonance spectroscopy[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,2006,44(12):1714-1724. |
| APA | Wang, LY,Zhao, XZ,&Feng, JW.(2006).Effects of electron irradiation on poly(vinylidene fluoride-trifluoroethylene) copolymers studied by solid-state nuclear magnetic resonance spectroscopy.JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,44(12),1714-1724. |
| MLA | Wang, LY,et al."Effects of electron irradiation on poly(vinylidene fluoride-trifluoroethylene) copolymers studied by solid-state nuclear magnetic resonance spectroscopy".JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 44.12(2006):1714-1724. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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