SMA增容PA6/ABS共混物的结构和力学性能

Structure and Mechanical Properties of Polymer Blends of PA6 and ABS Compatibilized by SMA

摘要: 以苯乙烯-马来酸酐共聚物(SMA)为增容剂,研究了共混工艺对PA6/ABS共混物结构和力学性能的影响.结果表明:以ABS为基体时,加入增容剂SMA后,PA6分散相尺寸变小且均匀地分散于ABS中,显著改善了共混物的冲击、拉伸性能;当以ABS为基体、PA6为分散相时,共混物的结构和力学性能强烈地受共混工艺的影响,SMA先与ABS共混,再与PA6共混,共混物的分散相尺寸最小,力学性能最好;当以PA6为基体、ABS为分散相时,共混物的结构和力学性能基本不受共混工艺的影响.

Abstract: PA6/ABS(acrylonitrile-butadiene-styrene) blends compatibilized with styrene-maleic anhydride (SMA) were prepared in a corotating twin-screw extruder with different blending procedures.The influence of blending procedure on structure and mechanical properties was studied.The results show that the particle of PA6 phase had decrescent size and dispersed uniformly after the compatibilizer SMA added when the substrate was ABS.The impact and mechanical properties of the blends were improved greatly.The effect of blending procedure on the morphology and mechanical properties was obvious when the substrate was ABS and the dispersed phase was PA6.The particle size was minimum and the mechanical properties were best in (SMA/ABS)/PA6.And the effect was tiny as the substrate was PA6 and the dispersed phase was ABS.