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采用自制的2种大层间距(层间距分别为6.72nm和8.66nm)的聚醚铵(POP)改性蒙脱土(MMT)OMMT1和O-MMT2,通过共混法与增容剂马来酸酐接枝聚丙烯(PP-g-MAH)或聚丙烯(PP)复合,考察了共混方法、共混时间、POP改性MMT的层间距及PP-g-MAH对MMT/PP-g-MAH和MMT/PP复合材料微观结构的影响。研究结果表明:由于O-MMT1具有较大的层间距,在溶液共混和熔融共混中,均能使MMT在PP-gMAH基体中发生剥离;随着共混时间延长,O-MMT1由插层型经过过渡状态向剥离型转变,最终可以获得完全剥离的纳米MMT/PP-g-MAH复合材料;在溶液共混的过渡态中存在大量“双层结构”的MMT片层;具有更大层间距的O-MMT2以及PP-g-MAH的加入均能更有效地促进MMT在PP基体中的剥离,从而获得完全剥离的纳米MMT/PP复合材料。
Two kinds of self-made polyether ammonium (MMT) OMMT1 and O-MMT2 with two large layer spacing (6.72nm and 8.66nm) (PP-g-MAH) or polypropylene (PP) were investigated. The effects of blending method, blending time, interlayer distance of POP-modified MMT and PP- Effect of MAH and MMT / PP Composites Microstructure. The results show that due to the larger interlayer spacing of O-MMT1, MMT can be peeled off in PP-gMAH matrix both in solution blending and melt blending; with the blending time prolonging, O-MMT1 is composed of intercalation Type transitional state transition to the peel-off type, and finally can be completely stripped of nano-MMT / PP-g-MAH composite material; in the transition state of the solution blends there are a large number of “double layer structure” MMT sheet; Large-layer spacing of O-MMT2 and PP-g-MAH can promote the delamination of MMT in PP matrix more effectively, so as to obtain fully stripped nano-MMT / PP composites.