节点文献

不同结晶度聚乙烯醇水凝胶中水氢键缺损的拉曼光谱学研究

HYDROGEN-BOND DEFECT OF WATER IN PVA HYDROGELS BY RAMAN SPECTRAL ANALYSIS

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 GUO Xinglin, LI Fumian (Department of Polymer Science and Engineering, College of Chemistry, Peking University, Beijing\ 100871) ZHANG Shulin (Department of Physics, Peking University, Beijing\ 100871)

【机构】北京大学化学与分子工程学院高分子科学与工程系!北京100871；北京大学物理系!北京100871；

【Abstract】 The hydrogen\|bond defect of water in PVA hydrogels was studied by Raman spectral analysis. The PVA hydrogels were prepared from PVA of different DP in different concentrations via freeze/thawed method.It was found that the hydrogen bond defect of water in PVA hydrogels is affected by their crystallinity which was depended on the molecular weight and concentration of PVA and also the number of freeze/thawed cycles.After swelling in water for 24?h,partial VA units were released from the crystalline regions,this means that more `free’ VA units could bond with water in PVA hydrogels,causing the decrease of C value and the increase of N value.更多还原

【关键词】拉曼光谱；冷冻解冻(FT)方法； PVA；水凝胶；聚集谱带；氢键缺陷；结晶度；
【Key words】 Raman spectra； Freeze/thawed method； PVA hydrogels； Collective band； Hydrogen bond defect； Crystallinity；

【基金】国家自然科学基金资助项目 !(基金号 5 9773 0 18和 5 963 3 0 2 0 )

【文献出处】高分子学报 ,Acta Polymerica Sinica , 编辑部邮箱 ,2001年03期

【分类号】O631
【被引频次】18
【下载频次】668

知网节下载

节点文献中：

本文链接的文献网络图示:

本文的引文网络

节点文献