氢化萜烯酯型环氧树脂基多元醇的合成与结构表征
Synthesis and Structure Characterization of Polyols from Hydrogenated Terpinene-maleic Ester Type Epoxy Resin
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摘要: 以氢化萜烯酯型环氧树脂(HTME)与带活泼氢的(羟基)化合物(二乙醇胺,N-甲基单乙醇胺,二乙胺)反应制备了环氧树脂基多元醇.通过研究不同反应因素对合成反应的影响,确定了合成环氧树脂基多元醇的最佳反应条件:反应温度为60~70℃,反应时间2h,反应溶剂为无水乙醇,用量为反应物总质量的40%.最佳条件下合成的3种环氧树脂基多元醇,HTME-D-EA的羟值最大,为(300±20)mg/g,HTME-MEA其次,为(260±20)mg/g,HTME-D-eA的羟值最小,为(200±10)mg/g;HTME-D-eA多元醇的剩余环氧值最大,因为DeA与HTME的反应活性低于DEA、MEA与HTME的反应活性.用红外光谱法表征了环氧树脂基多元醇的化学结构.Abstract: Three kinds of polyols were synthesized from hydrogenated terpinene-maleic ester type epoxy resin(HTME)and secondary amines(diethanolamine(DEA), N-methylethanolamine(MEA) and diethylamine(DeA)). They can be used in place of the commonly used polyols to prepare two-component polyurethanes.When reacted at 60-70℃ for about 2 h, products of good quality can be obtained by using ethanol as solvent in an amount about 40% by weight based on the weight of reactants. Among the polyols synthesized under the optimum conditions, HTME-D-EA polyol has the largest hydroxyl value of(300±20)mg/g, HTME-MEA polyol has a value of(260±20)mg/g, and HTME-D-eA polyol has the smallest hydroxyl value of(200±10)mg/g. Because of the low chemical activity of DeA reacting with oxirane ring of HTME, the residual epoxy value of HTME-D-eA polyol is comparatively large, in contrast with those of other two polyols. The chemical structures of the polyols from HTME were characterized by chemical and FT-IR spectrometric methods.