Study on preparation and performance of CaSO_4 whisker/PP-R composite

The performance of PP -R resin was improved by adding CaSO4 whisker. The modification process of CaSO4 whisker and the influence of CaSO4 whisker in improving the performance of PP -R resin, such as thermal resistance and mechanical property had been researched. The break surface of CaSO4 whisker/PP -R resin composite was observed by SEM imagines. The results show that CaSO4 whisker modified with 8% KH550 possesses better disperse character;modification effect of whisker on resin closely related to the length of whisker,the longer the whisker,the better the modification effect. Compare to pure PP -R resin,the performance of composite material was improved greatly when adding 5% CaSO4 whisker,its heat distortion temperature was increased from 72 ℃ to 104 ℃ and elongation at break was improved from 45% to 122%.