Isotactic polypropylene (PP) composites achieved high impact strength by melt mixing with complex titanate whiskers/multiwalled carbon nanotubes (MWCNTs). The complex fillers, obtained via coupling agent γ-aminopropyl triethoxysilane, triggered additional reinforcement with stiff backup of whiskers and strengthened interfacial adhesion generated from MWCNTs, forwarding positive synergy on the PP composites. In presence of compatibilizer maleic anhydride-grafted polypropylene, 5 wt% of the complex fillers brought about impact strength 6.3 ± 0.3 kJ/m² to the composite, which was 103% higher than PP. Meanwhile, tensile strength was also improved with 34.8 ± 0.5 MPa as compared with that of PP (32.6 ± 0.3 MPa). Morphology witnessed by scanning electron microscope revealed that the complex fillers favored dispersion of MWCNTs in polymer matrix, fulfilling bridging for reinforcement. Detection of differential scanning calorimetry also indicated that the complex fillers facilitated crystallization of PP in the composites. Upon high impact strength and improved tensile property, the PP composites could find potentials with facile processing manipulation in applications.

全同立构聚丙烯（PP）复合材料通过与复杂的钛酸酯晶须/多壁碳纳米管（MWCNT）熔融混合而获得了高冲击强度。通过偶联剂γ-氨基丙基三乙氧基硅烷获得的复杂填料，通过晶须的坚硬支撑和MWCNT产生的界面附着力，引发了额外的增强作用，从而在PP复合材料上产生了积极的协同作用。在相容剂马来酸酐接枝聚丙烯的存在下，5 wt％的复合填料带来的冲击强度为6.3±0.3 kJ / m ²复合材料，比PP高103％。同时，与PP的抗拉强度（32.6±0.3 MPa）相比，抗拉强度也提高了34.8±0.5 MPa。扫描电镜观察的形态表明，复合填料有利于MWCNT在聚合物基质中的分散，实现了增强桥联。差示扫描量热法的检测还表明，复合填料促进了复合物中PP的结晶。由于高冲击强度和改进的拉伸性能，PP复合材料可以在应用中方便地进行加工操作，从而找到潜力。