超分散剂对聚丙烯复合材料性能的影响

Effect of Hyper-dispersant on Properties of Polypropylene Composites

以丙烯酸甲酯,二亚乙基三胺及硬脂酸等为原料,合成超支化分散剂(HBPL),采用傅立叶红外光谱(FT-IR)对其结构进行表征。结果表明:经HBPL改性后,聚丙烯/CaCO3复合材料的界面相容性得到很大的提高,冲击强度、弯曲强度分别比未经分散剂改性粉体的复合材料提高了50.2%和8.8%,复合材料的结晶形态基本保持不变,并采用扫描电镜(SEM)观察复合材料的冲击断面形貌。

Hyper-dispersant （HBPL） was synthesized by using methyl acrylate, diethylene triamine and stearic acid as raw materials, its structure was characterized by means of Fourier transform infrared spectroscopy （FT-1R） and used as modification of nano-CaCO3 powers. Results show that after HBPL modification, the intert5cial compatibility of polypropylene composite materials are greatly improved, the impact strength, bending strength of the PP/CaCO3 composites treated with HBPL were higher than those unmodified system, which increased by 50.2 % and 8.8 %, respectively. The crystalline morphology of the composites remains unchanged, and the morphologies of impact fractured surface of the PP/CaCO3 composites was observed by using scanning electron microscopy （SEM）.