OALib Journal期刊
ISSN: 2333-9721
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桐油基水性聚氨酯的合成与表征
Keywords: 桐油,水性聚氨酯,酯交换
Abstract:
?通过桐油、乙二醇之间的酯交换反应,得到了单羟基桐油酸酯。以聚酯多元醇pol-256、2,4-甲苯二异氰酸酯(tdi)、二羟甲基丙酸(dmpa)、单羟基桐油酸酯为主要原料,制备了一系列的桐油基水性聚氨酯。采用傅里叶变换红外光谱仪(ft-ir)、热重分析仪(tga)等对产品的结构与性能进行了表征。结果表明:合成的物质为目标产物;经单羟基桐油酸酯封端的水性聚氨酯,提高了单羟基桐油酸酯的含量,固化膜的耐热性能增强,耐水性得到明显的提高,硬度增强,拉伸强度增大,而断裂伸长率却有所降低。
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