尼龙66/MWGF复合材料的力学性能研究

以硅烷偶联剂(KH550)为粘合剂,将酸化后的多壁碳纳米管接枝到玻璃纤维表面,制备出玻纤/碳纳米管复合填料(MWGFs)。将不同含量的玻纤和复合填料添加到尼龙66中,分别制备出PA66/GF和PA66/MWGF复合材料,然后对复合材料的力学性能,热性能进行了测试分析。结果表明,GF和MWGF都能够显著增强尼龙66的力学性能。在拉伸性能方面,PA66/MWGF复合材料要高于PA66/GF复合材料,但PA66/GF复合材料缺口冲击性能则明显好于PA66/MWGF复合材料。在热性能研究中,我们发现GF和MWGF都能够提高尼龙66的结晶温度。但在结晶度影响上,GF的添加能够提高尼龙66的结晶度,而MWGF则相反,它的加入略微降低了尼龙66的结晶度。

With silane coupling agent （KH550） as binder, glass fiber/carbon nanotube composite fillers （MWGFs） were preparedby grafting acidified multi-walled carbon nanotubes onto glass fiber surface. PA66/GF and PA66/MWGF composite materials were pre-pared by adding different contents of glass fiber and composite fillers into nylon 66. The mechanical and thermal properties of PA66/GF and PA66/MWGF composites were tested and analyzed. The results showed that both GF and MWGF could significantly enhancethe mechanical properties of nylon 66. The tensile strength of PA66/MWGF composite is higher than that of PA66/GF composite ma-terials, but the notched impact strength of PA66/GF composite is better than that of PA66/MWGF composite. In the study of thermalproperties, we found that both GF and MWGF could increase the crystallization temperature of nylon 66. However, the addition of GFcan improve the crystallinity of nylon 66, while MWGF can decrease the crystallinity of nylon 66 slightly.