黄原胶水溶液结构流变性质的研究

黄原胶水溶液是石油３次开采中的新型聚合物驱油剂，研究了３种黄原胶水溶液在不同溶液浓度，不同离子强度下的流变性质，并用透射电镜观察黄原胶水溶液链的结构形态，结果表明，黄原胶水溶液的粘度和浓度间具有奇特的性质，它对应于黄原胶水溶液内在结构形态的变化，在不同离子强度下，黄原胶水溶液的螺旋结构可被诱发转变，而其结构转变的过程与所测黄原胶水溶液的流变性质吻合。

A Study of Relationships Between Chain Structure and Rheological Properties of Xanthan Gum Solutions

The rheological characters and chain conformation changes of xanthan gufn solu-tions have been studied. We find that within low concentration region there is a characteristictransition for three kinds of xanthan aqueous solutions in viscosity-concentration curve. Theelectron micrographs can be seen that at different NaCl solutions, xanthan chain structure hasdifferent helix conformations, It is suggested that rheological characters of xanthan are causedby the transition between the ordered conformations,induced by the equilibrium status of inter-action intra and inter-molecular chains.