超支化分散剂对PP/CaCO3性能的影响

摘要

A kind of hyperbranched dispersant (HBD) was synthesized with 12-hy-droxy stearic acid, Boltorn H20 hyperbranched polyesters and toluene diisocyanate. The effects of the calcium carbonate powder treated with HBD on structure and properties of PP/CaCO3 were studied. The results show that the impact strength and flexural strength of the PP/CaCO3 composites treated with HBD are higher than those of unmodified system, which increase by 52.8% and 22%, respectively. In addition, addition of a few of HBD is helpful to improve the thermal properties of PP/CaCO3 composites.%以12-羟基硬脂酸、Boltorn H20超支化聚酯和甲苯二异氰酸酯为原料,合成超支化分散剂(HBD),研究了HBD处理CaCO3粉体后对PP/CaCO3结构与性能的影响.结果表明,经HBD处理CaCO3粉体后的PP/CaCO3的冲击强度、弯曲强度分别比未处理的提高了52.8％和22％,加入少量HBD也有利于提高PP/CaCO3的热性能.