微相分离促进剂对MDI型聚氨酯弹性体的耐热性能影响研究

摘要

在聚氨酯弹性体固化过程中添加微相分离促进剂,通过差示扫描量热分析(DSC)和动态力学性能测试(DMA)表明,微相分离促进剂的加入提高了4,4ˊ-二苯基甲烷二异氰酸酯(MDI)弹性体的微相分离程度；通过不同温度下的热失重分析( TGA)和力学性能高温保持率对比分析表明,添加了微相分离促进剂的聚氨酯弹性体耐热性能得到了提高.%Microphase separation promoter was added in the polyurethane based on MDI before solidifying process. It indicated that the degree of microphase separation of MDI increased because the microphase separation: promoter was added by the DSC and DMA;it indicated that the heat-resistance property of polyurethane based on MDI increases because of the microphase separation promoter by the TGA under the different temperature and the mechanics performance maintenance rate at high temperature.