摘要
用本体聚合法合成了亚甲基 -双 (4 -苯基异氰酸酯 ) (MDI)— 1 ,4 -丁二醇 (BDO)—聚 1 ,2氧亚丙基二醇 (PPG)型热塑性聚氨酯弹性体 (TPU)。对各原料组分对TPU的功能、聚合原理进行了介绍。对TPU的拉伸性能和硬度进行了研究。实验结果表明 :TPU的硬度随温度升高而降低 ,有一个突变温度 ,同时 ,随着TPU分子量的增加拉伸强度略有增加 ,伸长率有所下降 ,硬度增加。
The MDI-BDO-PPG Polyurethane elastomer(TPU) was prepared by stoichimetric method. The principle of polymerization and the effect of components on the property of TPU were investigated. The study showed that the herdness of TPU decreased with increasing temperature accompanied by a breaking temperature. The tensile strength and the hardness increased slightly with the increment of Mn while the elongation rate decreased a little.
出处
《第一军医大学分校学报》
2004年第1期24-25,共2页
Journal of Branch Campus of the First Military Medical University
