不同偶联剂改性PTW对PP/GF复合材料性能的影响

目的研究六钛酸钾晶须表面改性对聚丙烯复合材料的力学性能影响,以探索最佳表面改性手段。方法分别采用硅烷偶联剂KH550、KH570、正十二烷基三甲氧基硅烷,钛酸酯偶联剂NDE311、改性六钛酸钾晶须(PTW),然后将改性过的六钛酸钾晶须、玻璃纤维、聚丙烯通过熔融共混制得聚PP/GF/PTW复合材料。结果比较六钛酸钾晶须经不同偶联剂改性前后对聚丙烯/玻璃纤维复合材料性能的影响,发现改性过的六钛酸钾晶须可改善复合材料的力学性能。比较不同偶联剂改性六钛酸钾晶须对聚丙烯/玻璃纤维复合材料性能的影响,发现经KH550偶联剂处理后,与未改性相比,复合材料的弯曲性能提高了58.63%,拉伸性能提高了16.07%,冲击性能提高了63.1%。结论六钛酸钾晶须经KH550偶联剂处理后,复合材料的综合性能最好。

Effect of PTW Modified by Different Coupling Agents on the Properties of PP/GF Composite

This work aimed to study the effect of surface modification of potassium titanate whiskers on the mechanical properties of polypropylene composites, in order to explore the optimal surface modification method. Silane coupling agents KH550, KH570, 12 alkyl trimethyl silane modification, titanate coupling agent NDE311, were used respectively to modify potassium titanate whiskers (PTW), and the modified potassium titanate whiskers, glass fiber and pp were used to prepare polymer PP/GF/PTW composites by melt blending. The effects of PTW before and after modification by different coupling agents on the properties of polypropylene/glass fiber composites were compared, and it was found that the modified PTW could improve the mechanical performance of the composites. The effects of PTW modified by different coupling agents on the properties of polypropylene/glass fiber composites were compared, and it was found that after treatment with KH550 coupling agent, the bending performance, stretch performance and impact performance of the composites were improved by 58.63%, 16.07%, and 63.1%, respectively, as compared to those without modification. The PTW modified by KH550 coupling agent led to the composites with the best comprehensive properties.