聚氨酯/碳纳米管复合材料力学及电性能研究

利用超声分散和原位聚合的方法制备了聚氨酯／碳纳米管((PUR／CNTs)复合材料，观察了该复合材料的微观结构，探讨了CNTs含量对复合材料力学性能和电性能的影响。结果表明，CNTs在基体中获得了较好的分散，当CNTs质量分数为2％时复合材料的力学性能得到全面提高，与PUR相比，拉伸强度提高11．6％，拉伸弹性模量提高11．3％，断裂伸长率提高10．4％；复合材料的导电性能得到明显的提高，在CNTs质量分数为0．5％时可用作抗静电材料。

STUDY ON ELECTRICAL AND MECHANICAL PROPERTIES OF POLYURETHANE/CNTs COMPOSITE

The composite of polyurethane(PUR) carbon nanotubes (CNTs) was prepared via in-situ polymerization under the process of ultrasonic. The microstructure of the composite was observed and the effects of CNTs content on the electrical and mechanical properties were discussed. The results showed that CNTs were dispersed very well in the composite. The mechanical properties of the composite containing 2% content of CNTs were all improved compared with those of PUR, with the tensile break strength increasing by 11.6%, modulus of elasticity in tension increasing by 11.3% and elongation at break increasing by 10.4%. The electrical conductivity of the composite improved markedly and the composite could be used as antistatic material when the content of CNTs was 0.5%.