摘要
通过动态流变测试，研究PAN／DMSO溶液的热致变凝胶化过程和测定PAN／DMSO溶液的凝胶点温度。主要通过测量动态流变学参数（动态模量G′i和G″ii、损耗角正切tanδ、复数粘度η^＊）来表征PAN溶液的凝胶化行为，分析了含水量对溶液凝胶化行为和凝胶结构的影响。结果发现，虽然PAN溶液的凝胶点温度随着溶液中含水量的增加而升高，但是由松弛指数n和分形维数值df表征的凝胶结构几乎不受溶液中含水量的影响。
Thermal-induced gelation and gelation temperature of PAN/DMSO solution were investigated through dynamic theological measurements. The dynamic rheological parameters （dynamic module G′i and G″ii, loss tangent and complex viscosity η^＊） were used to characterize the gelation behavior of PAN solution. The effect of water content on the gelation behavior and gel structure was analyzed. The experimental results showed that the gelation temperature of PAN solution increased with the increase of water content in the solution,while the water content exerted little influence on the gel structure ,which can be characterized by the relaxation exponent n and the fractal dimension df.
出处
《合成技术及应用》
2009年第2期5-9,13,共6页
Synthetic Technology & Application
基金
国家973项目(2006CB605303)
国家自然科学基金项目(50333050)
上海市重大基础理论项目(07DJ14002)
