| INTERMOLECULAR AND INTRAMOLECULAR INTERACTIONS OF POLYMER GUAR GUM IN SOLUTIONS |
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| 作者姓名： | Yun-fei Yan Hai-yang Yang Wen-yong Liu Ping-ping Zhu Ping-sheng He |
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| 作者单位： | [1]Department of Polymer Science and Engineering,University of Science and Technology of China, Hefei 230026, China [2]Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China |
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| 摘 要： | The tetrahedral borate ion can crosslink with polymer guar gum in aqueous solutions. If the concentration of guar gum is less than 0.045 g/dL, the intramolecular interaction between guar gum and borate ion increases due to the formation of crosslinks. As a result, the polymer chains of guar gum in solution shrink in size and the reduced viscosity of polymer solution decreases accordingly. On the other hand, if the concentration of guar gum is greater than 0.045 g/dL, the intermolecular interaction becomes apparent due to the same reason. The polymer chains, therefore, associate together and the reduced viscosity of polymer solution increases considerably. According to this technique, the critical concentration c^＊, presented by de-Gennes, is determined successfully.
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| 关 键 词： | 聚合体 四面体 溶解性 交互作用 |
| 收稿时间： | 2004-09-23 |
| 修稿时间： | 2005-01-04 |
INTERMOLECULAR AND INTRAMOLECULAR INTERACTIONS OF POLYMER GUAR GUM IN SOLUTIONS |
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| Yun-fei Yan Hai-yang Yang Wen-yong Liu Ping-ping Zhu Ping-sheng He.INTERMOLECULAR AND INTRAMOLECULAR INTERACTIONS OF POLYMER GUAR GUM IN SOLUTIONS[J].Chinese Journal of Polymer Science,2005,0(5):557-559. |
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| Authors: | Yun-fei Yan Hai-yang Yang Wen-yong Liu Ping-ping Zhu Ping-sheng He |
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| Institution: | Department of Polymer Science and Engineering, b Structure Research Laboratory, University of |
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| Abstract: | The tetrahedral borate ion can crosslink with polymer guar gum in aqueous solutions. If the concentration of guar gum is less than 0.045 g/dL, the intramolecular interaction between guar gum and borate ion increases due to the formation of crosslinks. As a result, the polymer chains of guar gum in solution shrink in size and the reduced viscosity of polymer solution decreases accordingly. On the other hand, if the concentration of guar gum is greater than 0.045 g/dL, the intermolecular interaction becomes apparent due to the same reason. The polymer chains, therefore, associate together and the reduced viscosity of polymer solution increases considerably. According to this technique, the critical concentration c*,presented by de-Gennes1], is determined successfully. |
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| Keywords: | Guar gum Crosslink reaction Critical concentration c* |
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