通过共混包覆法与母粒法制备出纳米CaCO3/PP复合纤维,研究了2种工艺对复合纤维力学性能和分散性能的影响,分析了其力学性能的不匀率,并讨论了其增强机理.结果表明,在共混包覆法中,高速混合机所提供的高剪切力和聚合物的强黏附性使纳米CaCO3在PP中具有良好的分散性,由FTIP可知在纳米CaCO3与PP之间形成了C-O-Ca键,使纳米粒子与PP基体形成较强的结合力,进而提高了纤维的强度,且加工简易,有效地降低了生产成本,而母粒法效果较差.
The mechanical properties and dispersion behavior of nano-CaCO3/PP composite fibers prepared by blending and adhesion methods are investigated.The unevenness of mechanical properties is analyzed and the reinforced mechanism is discussed.The results show that nano-CaCO3 is well dispersed in PP matrix as result of high shear force and strong adhesion supplied by adhesion method.Moreover,FTIR test shows that the C-O-Ca bond is formed,which makes strong binding force formation between the nano-CaCO3 and PP matrix.The fiber has good mechanical properties and low cost,which masterbatch method can not achieve.
参考文献
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