摘要
用双螺杆挤出机制备了聚丙烯 (PP)与尼龙 6 (PA6 )的共混物。先用多组分熔融接枝的方法将马来酸酐 (MAH)和苯乙烯 (St)共同接枝于聚丙烯 (PP)上 ,制得多单体接枝聚丙烯 PP- g- (MAH- St) ,该接枝物具有较高的 MAH接枝率。利用 MFR、SEM、TEM和力学性能测试等分析方法 ,研究了多组分熔融接枝聚丙烯 PP- g- (MAH- St)对 PA6 / PP共混物的形态结构和力学性能等的影响。结果表明 ,PP- g- (MAH-St)中的酸酐基团与 PA6末端的氨基发生化学反应 ,原位形成的 PP- PA6共聚物能有效地改善 PA6与PP的相容性 ,可以使 PP均匀地分散在 PA6基体中 ,相区尺寸明显减小 ,可至 0 .1 μm。并使共混物的力学性能得到均衡的提高 ,冲击韧性的提高尤其显著 。
In this study, the melt grafting of maleic anhydride(MAH) and styrene(St) onto polypropylene(PP) was carried out. The multi monomers melt grafting PP, i.e. PP g (MAH St)was used as a compatibilizer precursor of PA6/PP blends. The addition of PP g (MAH St) markedly improved the mechanical properties of the incompatible PA6/PP (PA6 content 70%), particularly in the tensile strength and Izod impact strength of the blends. There are also significant changes in MFR values and Molau′s test for the blends, implying excellent compatibility between PA6 and PP in the presence of the PP g (MAH St). The improved blend morphologies were observed by means of SEM. The dispersed particle size decreased with increasing content of PP g (MAH St) used. And the dispersed sphere particles with diameters of 0.1 μm could be attained for PA6/PP g (MAH St)(70/30) blend. This should be due to the formation of PP PA6 copolymer by chemical reactions occurred between anhydride of MAH in PP g (MAH St) and the terminal amino groups of PA6 during the melt mixing.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2003年第3期141-144,共4页
Polymer Materials Science & Engineering
基金
华南理工大学聚合物成型装备国家工程研究中心科学与技术基金资助 (99- 0 0 1 )
