中文摘要：

一系列 polyureas 分别地通过与 toluene-diisocyanate， diphenylmethane-4,4-diisocyanate，和 hexamethylene-1,6-diisocyanate 更整齐的苯胺的反应被综合。这些 polyureas 的化学结构被英尺红外描绘并且验证， 1H NMR，元素的分析，紫外， XRD 和 CV。这些 polyureas 的传导性从 10 ? 7 ～ 10 ? four-point-probe 测量的 6 S/cm 仪器。比作独立苯胺更整齐，稳定性(热稳定性和电气化学的稳定性) ，反应范围和这些 polyureas 的敏感被提高。pH 价值的这些 polyureas DMF 答案的敏感比独立苯胺的优异更整齐。polyureas DMF 解决方案的颜色极大地被取决于 pH 价值和颜色变化进程是可逆的，每当时从对酸或从酸基础到基础。这些改进可以给这些 polyureas 更多的机会以便被用作传感器材料。

英文摘要：

A series of polyureas were synthesized through the reaction of aniline trimer with toluene-diisocyanate, diphenylmethane-4,4＇-diisocyanate, and hexamethylene-l,6-diisocyanate, respectively. The chemical structure of these polyureas was characterized and verified by FT-IR, ^1H NMR, elemental analysis, UV, XRD and CV. The conductivity of these polyureas ranged from 10^-7 to 10^-6 S/cm measured by four-point-probe instrument. Compared to the standalone aniline trimer, the stability （thermal stability and electrochemical stability）, response range and sensitivity of these polyureas are enhanced. The sensitivity of these polyureas DMF solution to pH value is superior to that of the standalone aniline trimer. The color of the polyureas DMF solution is greatly depended on pH value and the color change process is reversible, whenever from base to acid or from acid to base. These enhance- ments may give these polyureas more opportunities in order to be used as sensor materials.