在考察了聚氨酯-纳米碳酸钙/聚氯乙烯(PU-nano-CaCO3/PVC)反应挤出工艺的基础上,结合PU的反应特点,将经硬脂酸表面处理的nano-CaCO3利用超声辐照技术并经搅拌分散于液化4,4'-二苯基甲烷二异氰酸酯(L-MDI)中,采用反应挤出一步法工艺制备了PU-nano-CaCO3/PVC复合材料,并对其力学性能进行了研究.结果表明,PU与nano-CaCO3的质量配比为4:1时,对PVC的增韧效果最佳,PU与nano-CaCO3能协同增韧PVC,且nano-CaCO3具有补强作用.当PU/nano-CaCO3/PVC质量比为20:5:75时,材料的综合性能最优,冲击强度达到58.3 kJ/m2,拉伸强度为51.5 MPa.
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