为了进一步提高通用塑料PP(聚丙烯)的力学性能,采用共混方法制备了经钛酸酯偶联剂NDZ-201处理的纳米TiO2/PP复合材料,并通过对DSC熔融曲线的分析以及材料冲击破坏断口的形貌观察,研究了纳米TiO2质量分数和钛酸酯NDZ-201用量对PP的增韧、增强效果的影响.试验结果表明:纳米TiO2/PP复合材料的抗弯强度、抗弯模量和冲击强度随着纳米TiO2含量的升高明显提高,当含量超过5%时,力学性能增势趋缓,并且随着纳米粒子含量的增加力学性能出现下降的趋势;纳米TiO2的加入提高了PP的结晶度,使PP结晶为较多细小的β晶,此外弥散分布的纳米TiO2粒子显著增加了裂纹扩展阻力;在纳米TiO2加入量一定的情况下,PP的力学性能与钛酸酯偶联剂NDZ-201用量呈近似抛物线的关系,当NDZ-201用量为2%时对PP的增强增韧效果最显著.
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