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以可再生资源蓖麻油为起始剂环氧丙烷开环聚合的聚醚多元醇、聚丙二醇醚多元醇、TDI、MOCA等为主要原料,采用半预聚物法,室温固化制备双组分浇注型聚氨酯弹性体(CPUE)。对该新型聚氨酯弹性体进行了红外光谱测试,结果表明其分子结构中含有氨基甲酸酯基、醚键等基团的特征吸收峰;通过力学性能测试,原料中聚醚多元醇的种类、NCO基质量分数的改变都会引起弹性体性能的差异,这些差异存在一定的规律性;DSC差示扫描结果表明,聚氨酯弹性体分子链中硬段含量升高,玻璃化转变温度(Tg)升高;利用热重分析(TG)研究了其耐高温性能,结果表明硬段含量和扩链剂种类都会影响PUE的热稳定性。
Using castor oil as initiator, polyetherpolyol opened by ring-opening polymerization of propylene oxide, polypropylene glycol ether polyol, TDI and MOCA as the main raw materials, two-component casting was prepared by semi-prepolymer method and room temperature curing Polyurethane Elastomer (CPUE). The new polyurethane elastomer was tested by FTIR. The results showed that its molecular structure contains the characteristic absorption peaks of carbamate group, ether bond and other groups. Through the mechanical properties test, the types of polyether polyols, NCO The results of DSC differential scanning show that the content of hard segment in the molecular chain of polyurethane elastomer increases and the glass transition temperature (Tg) increases. The thermogravimetric analysis (TG) was used to investigate the high temperature resistance of the PUE. The results showed that both the hard segment content and the chain extender species affected the thermal stability of PUE.