| 聚氧乙烯超薄膜中构象变化的红外光谱研究 |
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| 引用本文： | 陈宙,王震,杨睿,谢续明.聚氧乙烯超薄膜中构象变化的红外光谱研究[J].高等学校化学学报,2004,25(2):385-387. |
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| 作者姓名： | 陈宙 王震 杨睿 谢续明 |
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| 作者单位： | 清华大学化工系高分子研究所, 材料研究中心教育部先进材料重点实验室, 北京 100084 |
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| 基金项目： | 国家自然科学基金 (批准号 :2 0 1740 2 2 )，国家重大研究计划子课题 (批准号 :90 10 3 0 3 5 )，清华大学分析测试基金资助 |
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| 摘 要： | 近年来 ,有关聚合物薄膜的研究受到了广泛关注 .低维数高分子超薄膜的各种行为由于涉及到高分子运动的动力学、热力学本质而逐渐成为高分子科学研究中的一大热点 .实验结果表明1～ 3] ,几何受限条件和基板对于聚合物薄膜结晶的形态及性能都会产生显著影响 .广角 X射线衍射实验和自由表面的掠入射 X射线实验 4 ]表明 ,有些在本体中呈现液晶有序的聚酰亚胺在靠近基板附近变得更加有序 .Despotopoulou等 5] 对聚二正己基硅烷在超薄膜中构象扰动的观察发现 ,当膜厚小于 2 0 0 nm时 ,聚二正己基硅烷的侧链变得无序 ,傅里叶变换红外光谱测试…
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| 关 键 词： | 聚氧乙烯 构象 超薄膜 红外光谱 |
| 文章编号： | 0251-0790(2004)02-0385-03 |
| 收稿时间： | 2003-02-24 |
| 修稿时间： | 2003年2月24日 |
IR Studies on Conformation Changes of Poly(ethylene oxide) Thin Films |
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| CHEN Zhou,WANG Zhen,YANG Rui,XIE Xu-Ming.IR Studies on Conformation Changes of Poly(ethylene oxide) Thin Films[J].Chemical Research In Chinese Universities,2004,25(2):385-387. |
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| Authors: | CHEN Zhou WANG Zhen YANG Rui XIE Xu-Ming |
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| Institution: | Institute of Polymer Department of Chemical Engineering, Advanced Materials Laboratory of Materials Research Center of Education Ministry, Tsinghua University, Beijing 100084, China |
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| Abstract: | The conformation changes in PEO thin films were studied by means of FTIR-ATR. The results showed that there were some pronounced intensity changes of some bands in IR spectra of PEO thin films when the film thickness was changed. With the decrease of the thickness of the PEO films, the amount of the gauche conformation relative to the trans conformation of PEO crystal increased. This conformation change indicates PEO chains prefer to assume the helical structure near the surface of the substrate, which should be resulted from the interactions between PEO chains and the substrate. This suggests the possibility for using thickness to adjust PEO chains conformation in the crystalline area. |
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| Keywords: | PEO Conformation Thin film IR spectrum |
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