Abstract: 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, 魏永梅, 王涛, 金浩, 田恒水. PEG/PTMG共聚醚型聚氨酯弹性体制备工艺的研究[J]. 现代化工, 2018, 38(7): 132-135,137.
CHU Yan-qian, WEI Yong-mei, WANG Tao, JIN Hao, TIAN Heng-shui. Research on preparation process for PEG/PTMG copolymerized polyether-polyurethane elastomer. Modern Chemical Industry, 2018, 38(7): 132-135,137.
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