| Phase Transition of Side Chain Liquid Crystal Polyecrylate Studied by Positron Annihilation Lifetime Spectra |
| 其他题名 | 侧链型丙烯酸醋共聚物相变的正电子湮没谱研究
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| Wang WH(王文华); Wei L(魏龙) ; Zhang TB(张天保); Wang, WH; Wei, L; Zhang, TB; He, L; Zhang, SF; Qi, ZN
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| 1996
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| 发表期刊 | ACTA PHYSICO-CHIMICA SINICA
 |
| 卷号 | 12期号:8页码:688-692 |
| 通讯作者 | [Wang Wenhua
; Wei Long
; Zhang Tianbao] Acad Sinica, Inst High Energy Phys, Lab Nucl Anal Tech, Beijing 100080, Peoples R China
; [He Liu
; Zhang Shufan
; Qi Zongneng] Acad Sinica, Inst Chem, Beijing 100080, Peoples R China
|
| 文章类型 | Article
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| 摘要 | The results of positron annihilation studies on the side-chain polymer liquid crystals were obtained as a function of temperature. It is indicated that thermotropic liquid crystal has two phase transition points near 40 degrees C and 76 degrees C respectively. It is suggested that the first phase transition point is correspondent to the melting point of specimen and the second one is clearing point at which liquid crystal phase transits isotropic liquid phase. It can be concluded by the changes of Free-Volume at the phase transition points that the smectic state S-A is in better ordered state than the other liquid crystals. The difference in the curves of o-Ps life-time with temperature between the liquid crystal and the liquid crystal polymer was explained. |
| 关键词 | Positron annihilation
Liquid crystal polymer
Free-Volume
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| 学科领域 | Chemistry
|
| DOI | 10.3866/PKU.WHXB19960804
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| URL | 查看原文
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| 语种 | 英语
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| WOS研究方向 | Chemistry
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| WOS类目 | Chemistry, Physical
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| WOS记录号 | WOS:000207600100004
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/238274
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| 专题 | 多学科研究中心
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| 作者单位 | 中国科学院高能物理研究所
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推荐引用方式
GB/T 7714 |
Wang WH,Wei L,Zhang TB,et al. Phase Transition of Side Chain Liquid Crystal Polyecrylate Studied by Positron Annihilation Lifetime Spectra[J]. ACTA PHYSICO-CHIMICA SINICA,1996,12(8):688-692.
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| APA |
王文华.,魏龙.,张天保.,Wang, WH.,Wei, L.,...&Qi, ZN.(1996).Phase Transition of Side Chain Liquid Crystal Polyecrylate Studied by Positron Annihilation Lifetime Spectra.ACTA PHYSICO-CHIMICA SINICA,12(8),688-692.
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| MLA |
王文华,et al."Phase Transition of Side Chain Liquid Crystal Polyecrylate Studied by Positron Annihilation Lifetime Spectra".ACTA PHYSICO-CHIMICA SINICA 12.8(1996):688-692.
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