| 黄原胶以三价铬交联的水凝胶的脱水行为 |
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| 引用本文： | 韩明,施良和,叶美玲.黄原胶以三价铬交联的水凝胶的脱水行为[J].高分子学报,1995,0(5):590-595. |
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| 作者姓名： | 韩明 施良和 叶美玲 |
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| 作者单位： | 中国科学院化学研究所 |
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| 摘 要： | 对黄原胶／三价铬水凝胶在７０，８０和９０℃下的脱水行为进行了研究．脱水与凝胶的交联密度即参与交联反应的三价铬的含量有密切联系．突发脱水之后的过程可以用一级反应动力学描述，反应速度常数随三价铬的浓度和温度的增高而增大，活化能为３４．５ｋｃａｌ／ｍｏｌ．一价盐（ＮａＣｌ）的含量对脱水过程没有影响．
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| 关 键 词： | 黄原胶，凝胶，脱水，脱水动力学 |
| 收稿时间： | 1993-12-17 |
SYNERESIS BEHAVIOR OF XANTHAN/Cr(Ⅲ) HYDROGELS |
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| HAN Ming,SHI Liang-he,YE Mei-ling,MULLER Guy.SYNERESIS BEHAVIOR OF XANTHAN/Cr(Ⅲ) HYDROGELS[J].Acta Polymerica Sinica,1995,0(5):590-595. |
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| Authors: | HAN Ming SHI Liang-he YE Mei-ling MULLER Guy |
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| Affiliation: | Institute of Chemistry; Academia Sinica; Beijing 100080; Polymeral; Biopolymsres; Membranes; Fac.des Sciences; University de Rouen; 76134 Mont St-Aigan; France |
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| Abstract: | Studies on syneresis behavior of Xantlian/Cr(Ⅲ)hydrogels have been conducted at 70,80 and 90℃. The onset of syneresis appeared at a critical Cr(Ⅲ)density in a gel and the syneresis became serious when the Cr(Ⅲ) density increased.The process of syneresis can be described by means of apperant first-order reaction and the rate constant increased with increasing the temperature and the initial Cr(Ⅲ)concentration. The apparent activation energy was about 34.5 kcal/mol.Moreover,the syneresis did not depend on the concentration of monovalent salt(NaCl). |
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| Keywords: | Xanthan Gel Syneresis Kinetics of syneresis |
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