Blends of polyamide1010 with unmodified and maleic-anhydride-grafted high-impact polystyrene

Abstract

ABSTRACT:The crystallization behaviors, dynamic mechanical properties, tensile, and morphology features of polyamide1010 (PA1010) blends with the high-impact polystyrene (HIPS) were examined at a wide composition range. Both unmodified and maleicanhydride-(MA)-grafted HIPS (HIPS-g-MA) were used. It was found that the domain size of HIPS-g-MA was much smaller than that of HIPS at the same compositions in the blends. The mechanical performances of PA1010 -HIPS-g-MA blends were enhanced much more than that of PA1010 -HIPS blends. The crystallization temperature of PA1010 shifted towards higher temperature as HIPS-g-MA increased from 20 to 50% in the blends. For the blends with a dispersed PA phase (Յ35 wt %), the T c of PA1010 shifted towards lower temperature, from 178 to 83°C. An additional transition was detected at a temperature located between the T g 's of PA1010 and PS. It was associated with the interphase relaxation peak. Its intensity increased with increasing content of PA1010, and the maximum occurred at the composition of PA1010 -HIPS-g-MA 80/20.