Melt Compounding and Mechanical Properties of Polyphenylene Sulfide/Low Melting-temperature Glass Composites

Abstract

Polyphenylene sulfide( PPS) with the melt temperature about 280 ℃ and low-melting temperature glasses( LMTG) with the soft-temperature( T s) about 325 ℃ were used to prepare PPS/LMTG organicinorganic hybrids by melt compounding above both characteristic temperatures. The surfaces of PPS / LMTG prepared at different processing conditions were observed by scanning electron microscope( SEM).Meanwhile,the mechanical properties for the composites marked as PPS / LMTG300 and PPS / LMTG400prepared below and above T s of LMTG respectively were investigated. The results indicate that liquid-liquid melt compounding is feasible in a wide temperature range from 325 ℃ to 450 ℃ for the selected composites.The SEM images show that dispersed phase in situ morphologies are influenced significantly by processing temperature,shear time and the mixer rotation speed. During liquid-liquid compounding,the dispersed phase,i. e. LMTG drops,goes through a series of process of deformation,break-up,coalescence and recovery in shearing field,similar to the evolution of dispersed polymer phase in immiscible blends with sea-island structure. Compared with PPS / LMTG300,the size of in situ morphology for LMTG phase in PPS / LMTG400obtained by liquid-liquid melt compounding is much smaller,leading to weaker interfacial interaction between the filler and matrix. In addition,LMTG particles still have an excellent strengthening effect on PPS /LMTG400 containing 66 wt% inorganic filler since particle dispersion is improved by liquid-liquid compounding.