Citation: 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, 23(5): 557-559. shu

INTERMOLECULAR AND INTRAMOLECULAR INTERACTIONS OF POLYMER GUAR GUM IN SOLUTIONS

Corresponding author: Hai-yang Yang,
Received Date: 23 September 2004
Revised Date: 10 January 2005

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[1], is determined successfully.
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