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采用体积排斥色谱法 /示差折光指数 /直角激光光散射 /示差粘度三检测联用技术表征PS -PI二嵌段共聚物。计算了共聚物的均方末端距 ;验证了不同PS含量的PS -PI共聚物符合普适标定关系。结果表明在 2 5℃的条件下 ,用体积排斥色谱法 /示差折光指数 /直角激光光散射 /示差粘度三检测联用技术直接获得的PS -PI共聚物的特性粘数与用Ho-Duc方程计算得到的特性粘数基本吻合。
PS-PI diblock copolymers were characterized by volume exclusion chromatography / differential refractive index / triple-angle laser light scattering / differential viscosity triple detection. The mean square end distance of the copolymers was calculated. The PS-PI copolymers with different PS contents were verified to be in agreement with the universal calibration. The results showed that the intrinsic viscosities of PS-PI copolymers directly obtained by the volume exclusion chromatography / differential refractive index / triple-angle laser light scattering / differential viscosity detection combined with the Ho-Duc equation The calculated intrinsic viscosity basically consistent.