PA6/PP合金的研制

PREPARATION OF PA6/PP ALLOY

以马来酸酐接枝聚丙烯(PP-g-MAH)为增容剂,制备了PA6/PP合金,研究了PA6/PP配比及PP-g-MAH用量对PA6/PP合金性能的影响。结果表明,加入一定量的PP-g-MAH能有效地改善PA6与PP之间的相容性,提高合金材料的各项性能指标。当PP-g-MAH用量为4份时,合金的力学性能最好;SEM分析显示,未加入PP-g-MAH时,PP在PA6基体中的分散不均匀、粒径大,当加入适量(4份)的PP-g-MAH时,PP在PA6中分散比较均匀,粒径尺寸明显减小;在PA6/PP(80/20)体系中加入4份PP-g-MAH制得合金的吸水率约为PA6的15%,缺口冲击强度分别比PA6、PP提高了72%和109%,热变形温度分别比PA6、PP提高了12℃和5.5℃。

PA6/PP alloy was prepared using. PP-g-MAH as compatilizer, and the effects of varied content of PP-g-MAH and PA6/PP ratio on alloy properties were studied. The results showed that adding proper content of PP-g-MAH could effectively improve the compatibility of PA6 and PP, so as to improve the properties of the alloy. When PP-g-MAH content was of 4 phr, the mechanical properties of the alloy were the best. The SEM pictures indicated that PP with larger grain dispersed asymmetrically in the body of PA6 without PP-g-MAH. When adding proper content（4 phr） of PP-g-MAH, PP dispersed uniformly and the grain was small. The PA6/PP （80/20） alloy containing 4 phr PP-g-MAH had only 15% water absorption of that of PA6, its notched impact strength was 172% and 209% higher than those of PA6 and PP separately, and accordingly its heat distortion temperature was 12℃ and 5℃ higher.