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通过双螺杆挤出机制备出PA6/PP/PP-g-MAH(聚酰胺6/聚丙烯/马来酸酐接枝聚丙烯)复合材料,并以PA6/PP/PP-g-MAH为原料,使用化学发泡剂在双螺杆挤出机上制得PA6/PP/PP-g-MAH发泡材料。利用差示扫描量热仪(DSC)和热场发射扫描电镜(FESEM)研究了PP-g-MAH对PA6/PP/PP-g-MAH中PA6相非等温结晶性能和可发泡性能的影响。研究结果表明:PP-g-MAH的加入对PA6相的熔融行为并没有显著的影响,但却使其结晶温度略有下降;PP-g-MAH的加入并没有改变PA6相晶体的成核方式及生长机理,但能使晶体生长速率有不同程度的下降,PA6相的非等温结晶动力学始终符合Jeziorny和莫志深模型;PA6/PP/PP-g-MAH发泡材料的发泡倍率和泡孔直径随着PP-g-MAH含量的增加而逐渐减小,但其泡孔密度随着PP-g-MAH含量的增加先增加后降低;在实验范围内,当PP-g-MAH含量为5phr时,PA6/PP/PP-g-MAH的可发泡性能最好。
PA6 / PP / PP-g-MAH (polyamide 6 / polypropylene / maleic anhydride grafted polypropylene) composites were prepared by twin-screw extruder. PA6 / PP / PP-g-MAH foams were made on a twin-screw extruder using a chemical blowing agent. The effects of PP-g-MAH on the non-isothermal crystallization and foamability of PA6 in PA6 / PP / PP-g-MAH were investigated by differential scanning calorimetry (DSC) and thermal field emission scanning electron microscopy (FESEM) . The results show that the addition of PP-g-MAH has no significant effect on the melting behavior of PA6 phase, but decreases the crystallization temperature slightly. The addition of PP-g-MAH does not change the nucleation mode of PA6 phase And growth mechanism, but can make the crystal growth rate in varying degrees of decline, non-isothermal crystallization kinetics of PA6 phase consistent with Jeziorny and Mo Chi deep model; PA6 / PP / PP-g-MAH foam expansion ratio and The cell diameter decreases with the increase of PP-g-MAH content, but the cell density first increases and then decreases with the increase of PP-g-MAH content. When the PP-g-MAH content At 5 phr, the foamability of PA6 / PP / PP-g-MAH was the best.