EFFECT OF PHASE MORPHOLOGY ON THE REACTIVE BLENDING
相形态对聚合物反应共混过程的影响

The updating process of interface plays an important role in the polymer reactive blending process,including the changes of interfacial area and phase morphology,and the material transportation.In this article,by using a typical thermodynamic incompatible blending system,polyolefin elastomer/polystyrene,the influence of different morphology (sea\|island structure and co-continuous structure) on the polymer reactive blending processes was investigated by means of rheology and morphology analyses.Rheological analysis suggests the additional contribution of formed block copolymer in the reactive blends,as well as the variation of relaxation process of droplets in sea\|island blend.The conversion in a typical blend is analyzed based on the change of interfacial relaxation time and droplet size by using the mean field theory.It is then suggested that phase morphology has a significant influence on the polymer reactive blending processes.Interfacial reactions happen more easily in blends with co\|continuous morphology due to their weak stability,while in the blends with the sea\|island morphology,the interface reaction process depends on the ease of interface deformation,and the blends system with small viscosity ratio favors interfacial reactions.