低烟耐烧蚀聚氨酯弹性体力学性能的研究

以1,6-六亚甲基二异氰酸酯(HDI)、聚氧化丙烯多元醇(PPG)、3,3/-二氯-4,4/-二氨基二苯甲烷(MOCA)为原料合成了聚氨酯弹性体,并进一步将消烟耐烧蚀反应型填料填充其中制得低烟耐烧蚀聚氨酯弹性材料。系统的研究了软段含量、交联度对产物力学性能的影响。结果表明:随软段长度的增加,HDI型聚醚弹性体的拉伸强度、邵氏硬度和回弹率降低,扯断伸长率增加;随着交联度的增加其扯断伸长率、邵氏硬度降低,拉伸强度则先降低后增加,回弹率却大幅增加。同时研究结果表明填充消烟耐烧蚀反应型填料的HDI型聚醚弹性体不仅具有优异的力学性能,还具有优异的低烟耐烧蚀性能。

Studies on Mechanical Properties of Polyurethane Elastomer with Low Smoke Ablation-Resistant

The polyurethane elastomer was prepared through the reaction of HDI,PPG and MOCA. And then, the functional filler with smoke suppression and anti-ablation material was doped in to the polyurethane elastomer. The effect of the soft segment length and the crosslinked degree on the mechanical properties of the polyurethane elastomer was investigated in detail. The tensile strength、shore hardness and Spring back rate of the polyurethane elastomer decreased with the increase in the soft segment length. However, the elongation at break increased. At the same time, the results showed that the breaking elongation and shore hardness decreased, and the spring back rate increased with the incrensement of the crosslinked degree. In addition, the polyurethane elastomer containing functional filler has low-smoke and ablation-resistance.