PA66/TLCP/HNTs纳米管复合材料的制备与性能

PREPARATION AND PROPERTIES OF PA66/TLCP/HALLOYSITE NANO-TUBES COMPOSITES

采用熔融共混方法制备了尼龙(PA)66/热致液晶聚合物(TLCP)/埃洛石纳米管(HNTs)复合材料,研究了其热性能、微观形态及力学性能。结果表明,当TLCP的质量分数为4%、HNTs的质量分数为15%时,复合材料的综合性能最佳。其拉伸强度、拉伸弹性模量、弯曲强度及弯曲弹性模量相比纯PA66分别提高了30.4%、76.9%、34.4%、91.7%。熔体的加工流动性得到改善,PA66/TLCP/HNTs复合材料的吸水性能明显降低。少量的TLCP有利于提高PA66/TLCP复合材料的结晶性能和熔融温度;HNTs的加入能提高复合材料的结晶温度,与基体有较好的界面结合;TLCP及HNTs能在基体中均匀地分散,TLCP在PA66/TLCP/HNTs复合材料中形成微纤结构,且沿纤维轴方向取向。

PA66/TLCP/Halloysite Nano-Tubes（HNTs） composites were prepared by means of meh blending. The mechanical properties, the morphologies and the thermal properties of the composites were investigated. The results showed that the comprehensive properties of the composites were maximal as the content of TLCP and HNTs was 4% and 15% respectively. Compared with pure PA66, the tensile strength, tensile modulus, flexural strength and flexural modulus of the composites were increased by 30.4%, 76.9%, 34.4% and 91.7% respectively. The melt index and the water absorption properties of the composites were improved obviously. The results of DSC test showed that small part of TLCP would promote composites crystallization. The crystallization temperature was increased with the addition of HNTs. SEM showed that HNTs dispersed well in PA66/TLCP composites. The impact fracture surface was broken in toughness. TLCP micro-flbrils were well dispersed.