以聚乙二醇（PEG）和聚四氢呋喃醚二醇（PTMG）为软段、1，6-六亚甲基二氨基甲酸甲酯（HDC）为硬段、二月桂酸二丁基锡（DBTDL）为催化剂、1，4丁二醇为扩链剂，采用酯交换缩聚法制备共聚醚型聚氨酯弹性体（CEUs）。通过一系列单因素对比实验，探讨了物料配比、预聚温度、预聚时间、缩聚温度和缩聚时间等对聚氨酯弹性体力学性能的影响。结果表明，在物料配比n（PTMG+PEG）：n（HDC）：n（BDO）=1.0：0.9：0.1、预聚温度为130℃、预聚时间为45 min、缩聚温度为175℃、缩聚时间为180 min的条件下，聚氨酯弹性体的断裂拉伸强度为61 MPa，断裂拉伸率为2718%。

Copolymerized polyether-polyurethane elastomers (CEUs) are prepared by a transesterfication polycondensation method with polyethylene glycol (PEG) and polyoxytetramethylene glycol (PTMG) as soft segments,methyl 1,6-hexamethylene-dicarbamate (HDC) as hard segment,dibutyltin dilaurate (DBTDL) as catalyst and 1,4-butanediol (BDO) as chain extender.The effects of materials' ratio,pre-polymerization temperature,pre-polymerization time,polycondensation temperature and polycondensation time on the mechanical properties of as-prepared CEUs are investigated by a series of single factor contrast experiments.The results show that the optimum conditions are as follows:n(PTMG+PEG):n(HDC):n(BDO)=1.0:0.9:0.1,pre-polymerization temperature at 130℃,pre-polymerization time for 45 min,polycondensation temperature at 175℃ and the polycondensation time for 180 min.Under the optimum conditions,the prepared CEUs has a tensile strength at break of 61 MPa,and a breaking elongation of 2 718%.

褚衍倩(1991-),女,硕士研究生,主要从事聚合物方面的研究,1010330619@qq.com