新型增韧剂对聚碳酸酯的增韧研究

Study on Toughening of a New Flexibilizer on Polycarbonate

采用不同种类增韧剂对聚碳酸酯(PC)进行增韧研究,通过冲击试验机、熔体流动速率测定仪、多功能材料试验机和电子分析天平测试了材料的缺口冲击强度、熔体流动速率、拉伸强度、弯曲强度和制品开裂时间。结果表明,随着新型双官能化增韧剂KT-30用量的增加,PC的冲击强度显著提高,材料的熔体流动性和弯曲性能下降较少,而且耐应力开裂性高;KT-30在PC中有很好的分散性,可直接注塑加工;当KT-30用量为5%(质量分数,下同)时,冲击强度约为纯PC的5倍,达到40.8kJ/m2。

The effect of a new dual-functional flexibilizer KT-30 on the properties of PC were studied. Izod impact strength, melt flow rate, tensile strength, bending strength and cracking time were test by impact tester, melt flow indexer, universal testing machine and electronic balance, respectively. It showed that with increasing KT-30, the impact strength of PC increased significantly, the melt flow properties and the flexural and melt flow properties decreased a little, and the stress cracking resistance was enhanced. KT-30 could be finely dispersed in PC matrix and the compounded system could be readily injection molded. When the mass fraction of KT-30 was 5 %, the impact strength of PC reached 40. 8 kJ/me , about 5 times that of neat PC.