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利用几种不同的纳米粒子[包括纳米SiO2、CaCO3、八乙烯基硅倍半氧烷(即八乙烯基POSS)]对聚氨酯弹性体进行改性,制备纳米复合材料。同时,研究了不同纳米粒子对聚氨酯弹性体性能的影响。测试结果表明,聚氨酯弹性体力学性能提高;热失重(TGA)结果表明加入纳米SiO2、CaCO3、八乙烯基POSS后,复合材料的初始热分解温度分别提高了16.01℃、10.95℃、15.00℃,材料热稳定性增强;扫描电镜(SEM)观察到纳米粒子在聚氨酯基体中分散性不够理想,存在团聚现象。
Polyurethane elastomers were modified with several different nanoparticles [including nano-SiO2, CaCO3, octavinyl silsesquioxane (ie, octavinyl POSS)] to prepare nanocomposites. At the same time, the influence of different nano-particles on the properties of polyurethane elastomer was studied. The results of TGA showed that the mechanical properties of the polyurethane elastomer were improved. The results of TGA showed that the initial thermal decomposition temperature of the composites increased by 16.01 ℃, 10.95 ℃ and 15.00 ℃ after adding nano-SiO2, CaCO3 and octavinyl POSS respectively. Thermal stability was enhanced. Scanning electron microscopy (SEM) showed that the dispersibility of nanoparticles in the polyurethane matrix was not ideal and there was agglomeration.