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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

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【作者】 郭兴林李福绵张树霖

【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.

【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
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