SMA/蒙脱石纳米复合材料增容PA6/ABS共混体系

COMPATIBILITY OF PA6 /ABS BLENDS WITH SMA /MONTMORILLONITE NANOCOMPOSITES

采用原位插层法制备苯乙烯-马来酸酐交替共聚物/蒙脱石(SMA/MMT)纳米复合材料增容PA6/ABS共混体系,并与SMA及MMT的增容效果进行比较,运用TEM、SEM、DSC及XRD研究了增容剂SMA/MMT及MMT的增容机理.结果表明,采用SMA做增容剂,体系机械性能下降;MMT可使体系拉伸强度提高,但冲击强度下降;采用SMA/MMT纳米复合材料做为增容剂,可提高共混体系的强度及韧性.TEM、XRD、DSC及SEM研究结果表明,PA6/ABS/(SMA-MMT)体系中MMT主要分布于两相界面处,ABS及PA6分子链可进入MMT层间,形成类似于共聚物结构,起到增容剂的作用,从而降低分散相粒径,增加两相界面作用力,有利于体系力学性能的提高.PA6/ABS/MMT体系中MMT主要分布于连续相PA6中,虽然对分散相粒径影响较小,但增强了PA6相强度,使得体系力学性能提高.

The poly（styrene-co-maleic anhydride） /montmorillonite（SMA /MMT） nanocomposites prepared by in situ intercalation were applied as compatibilizers for polyamide 6 （ PA6 ） /acrylonitrile-butadiene-styrene terpolymer（ABS） blends. The compatibization effect of SMA /MMT nanocomposites on PA6 /ABS blends was compared with that of SMA and MMT. The compatibization mechanism of SMA /MMT and MMT was investigated by TEM,SEM,DSC and XRD. The results show that compalibilizer SMA reduces the mechanical performance of blends; although compalibilizer MMT can improve the tensile strength of blends,the impact strength is decreased. Application of SMA /MMTnanocomposites as compalibilizer can improve the tensile strength and toughness of PA6 /SMA blends. The results of TEM,SEM,DSC and XRD show that for the blends of PA6 /ABS /（SMA-MMT）,MMT is located at interphase of ABS and PA6. The decresed domain size of disperse phase and improvement of the interphase interaction are attributed to the fact that polymer chains of ABS and PA6 can coexist between the intercalated MMT platelets,forming the silimar structure of copolymers, playing the role of compalibilizer to increase the mechanical strength. For the blends of PA6 /ABS /MMT,the MMT is located in the PA6 continuous phase. Although MMT can not reduce the size of disperse phase greatly, it can improve the PA6 phase strength,resulting in the increase of tensile shrength of PA6 /ABS blends.