熔融挤出制备了不同有机蒙脱土(OMMT)含量的OMMT/丙烯腈-丁二烯-苯乙烯(ABS)-尼龙6(PA6)(30/70,质量比)复合材料,用透射电子显微镜(TEM)、扫描电子显微镜(SEM)等研究了OMMT在ABS-PA6共混物中的分布及其对ABS-PA6共混物形态结构与力学性能的影响.结果表明:在OMMT/ABS-PA6复合材料中,OMMT主要以剥离形态分布在PA6基体相中,少量分布在PA6与ABS两相界面处,具有明显的选择分布性;随着OMMT含量增加,ABS分散相尺寸逐渐减小且分布均匀,OMMT/ABS-PA6复合材料的强度、模量逐渐提高,当OMMT含量为7 wt%时,弯曲强度和模量分别由未加OMMT时的66.7 MPa、2.308 GPa上升至94.1 MPa、3.184 GPa,缺口冲击强度在OMMT含量为3 wt%时出现极大值3.7 kJ/m~2,但总体变化不大.
OMMT/ABS- polyamide- 6(PA6)(30/70, mass ratio) composites were prepared using PA6, ABS and OMMT via the melt-mixing method. The morphology and mechanical properties of OMMT/ABS- PA6 composites with various amounts of OMMT were investigated using scanning electron microscope (SEM), transmission electron microscope (TEM) and mechanical measurement. It was found that most of OMMT platelets were exclusively located within the PA6 phase. The particle size and distribution of ABS dispersed phase are gradually reduced with increasing the OMMT content. Moreover, the OMMT/ABS - PA6 composites have higher strength as compared to ABS- PA6 blends. Particularly, the flexural strength and flexural modulus of OMMT/ABS - PA6 composites increase to 94. 1 MPa and 3. 184 GPa respectively by adding the OMMT content to 7 wt%. At 3 wt% OMMT content, the notched impact strength of OMMT/ABS - PA6 composites obtains a maximal value 3. 7 kJ/m~2, and after that, it tends to be unchanged.
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