【摘要】 利用高压毛细管流变仪研究了 SEBS- g- MAH对 PA6 /SEBS共混体系的流变行为影响 ,结果表明 ,PA6 /SEBS共混体系的粘度随 SEBS增加先降低后升高 ;PA6 /SEBS- g- MAH共混体系的粘度随 SEBS-g- MAH含量增多有较大幅度的增加 ;将 SEBS和 SEBS- g- MAH混合使用时 ,共混材料的流变行为表现为二者的协同作用结果 ,其中 SEBS- g- MAH对共混材料流变性能的影响更大。红外分析的结果表明 ,共混后 SEBS- g- MAH与尼龙 6发生了反应 ,生成游离羧酸 ,并且随 SEBS- g- MAH含量的增加 ,游离羧酸的量也逐渐增加 ,即共混后增加了体系中分子链长度 ,流动时分子链间更易发生缠结 ,使粘度增加 ,这与高压毛细管流变实验的结果是对应的更多还原

【Abstract】 The effect of SEBS g MAH on the rheology of PA6/SEBS blends was studied by means of high pressure capillary theometer. The results show that the viscosity of PA6/SEBS blends firstly decreases and then increases. For PA6/SEBS g MAH blends, the viscosity increases evidently as the percentage of SEBS g MAH raises. When SEBS and SEBS g MAH were added in combination, the viscosity of PA6/SEBS/SEBS g MAH blends represents the common influence of SEBS and SEBS g MAH, but SEBS g MAH has more effect on the blends. FT IR analysis indicates that SEBS g MAH can react with PA6, and dissociate carboxylic acid peak is shown, as the percentage of SEBS g MAH increases, the amount of dissociate carboxylic acid raises, that is to say, the molecular chains become longer after being mixed, therefore, the they are liable to tangle with each other and the viscosity raises. The results of FT IR are corresponding to that of rheology analysis.更多还原