PU／PGMA同步互穿网络的力学性能

研究影响高增塑聚氨酯／聚甲基丙烯酸缩水甘油酯同步互穿网络力学性能的因素，寻求最佳力学性能配方。方法，制备了不同配方的样品，对其进行拉伸试验以及动态力学分析。结果与结论改变ＰＵ与ＰＧＭＡ的组成比，ＳＩＮ的拉伸强度和延伸率呈非单调变化，在ＰＵ含为６０％附近时出现极大值，在体系中引入ＰＧＭＡ组分的交联剂及引入网间接枝剂均使体系的交联密度上升，导致抗张强度升高，断裂伸长率下降。

The Mechanical Properties of Simultaneous Interpenetrating Network of Polyurethane and Poly(glycidyl methacrylate)

Aim To study the factors affecting the mechanical properties of highly plasticized polyurethane(PU)/poly (glycidyl methacrylate) (PGMA)simultaneous interpenetrating network(SIN) and find the recipe with best mechanical properties. Methods Samples with different recipes were prepared and their mechanical data were obtained by using tensile test and dynamic mechanical analysis. Results and Conclusion The tensile strength and elongation of SIN change non monotonically as the composition ratio of PU to PGMA varies, their maxima would be obtained with PU content ca.60%. The introduction of crosslinker of PGMA and inter network grafting reagent into the system will increase the corsslinking density of the system, which results in that the tensile strength was elevated and the elongation was decreased.