| Summary: | 碩士 === 國立交通大學 === 應用化學系 === 87 === In this study, styrene-glycidyl methacrylate random copolymer (SG) is used to function as a reactive compatibilizer for the blends of liquid crystalline polymer (LCP) with syndiotactic polystyrene (sPS). The epoxy functional groups that present in the SG copolymer can react with the terminal groups of the LCP, carboxyl and hydroxyl, at interface to produce the desirable SG-g-LCP copolymer during melt processing. These in situ-formed copolymers tend to distribute along the interface, so as to reduce the interfacial tension in the melt and to enhance the interfacial adhesion in the solid state. SEM micrographs, perpendicular to the flow direction of inject-molded specimens, show that the domain size of the dispersed LCP particles has the tendency to reduce with the increase of SG content in the compatibilized sPS/LCP blends, an indication of improvement of compatibility between LCP and sPS. However, the amounts of SG in these compatibilized sPS/LCP blends are excess and result in the reduction of the number of in situ-created LCP fibrils, eventually leading to the formation of LCP droplet domain. Therefore, the mechanical properties of the sPS/LCP blends compatibilized by SG with the quantity employed in this study do not achieve a satisfactory performance.
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