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以马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)作为增容剂,采用熔体共混的方法制备了PA1010-PP共混物,通过扫描电镜(SEM)、力学性能和差示扫描量热(DSC)测试,研究了动态保压注射成型中POE-g-MAH对PA1010-PP共混物的增容作用。力学性能测试结果表明,在注射成型过程中施加剪切应力,明显提高了共混物的拉伸和冲击性能。SEM结果表明,剪切诱导制品产生多层次结构,而且分散相相区尺寸显著减小,分散更趋均匀,相界面更加模糊。DSC结果表明,剪切应力作用下,当POE-g-MAH的质量分数达到15%时,PP出现2个结晶峰,即出现异相成核结晶和均相成核结晶,PP均相成核结晶的出现从另一个方面表明动态试样中分散相PP尺寸小于静态试样。剪切应力作用下增容作用的提高归因于剪切应力作用下独特相形态的形成。
PA1010-PP blends were prepared by melt blending with maleic anhydride grafted ethylene-octene copolymer (POE-g-MAH) as compatibilizer. The properties of the blends were characterized by scanning electron microscopy Differential scanning calorimetry (DSC) was used to investigate the compatibilization of POE-g-MAH to PA1010-PP blends in dynamic injection molding. Mechanical properties of the test results show that the application of shear stress in the injection molding process, significantly improve the tensile and impact properties of the blend. The SEM results show that the shear induced products have multi-level structure, and the size of the dispersed phase area is significantly reduced, the dispersion is more uniform and the phase interface is more vague. The results of DSC show that when the weight fraction of POE-g-MAH reaches 15% under shear stress, PP has two crystal peaks, that is, heterogeneous nucleation crystallization and homogeneous nucleation crystallization, PP homogeneous nucleation The appearance of crystallization from another aspect indicates that the dispersed phase PP size in the dynamic sample is smaller than that of the static sample. The increase of compatibilization under the action of shear stress is attributed to the formation of distinct phase morphology under the action of shear stress.