胺种类对环氧/杂化非异氰酸酯聚氨酯性能的影响
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摘要
采用预聚体法,用环状碳酸酯型聚丙二醇二缩水甘油醚(5CC-PPGDGE)、乙二胺(EDA)、二乙烯三胺(DETA)、三乙烯四胺(TETA)、四乙烯五胺(TEPA)以及双酚A环氧树脂(BADGE)合成了4种环氧/杂化非异氰酸酯聚氨酯材料(环氧/PHU)。通过红外光谱测试(IR)、溶胀测试、力学性能、动态力学测试(DMA)和热失重(TGA)分析,详细研究了不同种类胺对环氧/PHU材料各种性能的影响。研究结果表明,5CC-PPGDGE与胺开环反应成功得到—NHCOO—基团;TEPA型的杂化PHU具有最大的交联密度和分子间作用力;TETA型PHU具有最大的拉伸强度和撕裂强度,其次是TEPA型PHU,断裂伸长率规律与此相反;Te TA型PHU和Te PA型PHU具有相似的T_g,其次是DETA型PHU,最小的为EEDA型PHU;热稳定性大小为EDA型PHUIn this paper,four kinds of epoxy-hybrid non-isocyanate polyurethane(PHU) based on a,co-bis-cycliccarbonates(poly(propylene)oxide bis-carbonates)(5CC-PPGDGE) and ethylenediamine(EDA),divinyl diethylenetriamine(DETA),triethylenetetramine(TETA) and tetraethylene pentamine(TEPA) and bisphenol-A epoxy resin(BADGE) were prepared by prepolymer mixing process.The influence of different amine type on the properties of PHU was investigated by fourier transform infrared spectra(IR),swelling characteristics,mechanical properties,dynamic mechanical test(DMA)and thermal gravity analysis(TGA).It was found that the-NHCOO- was successful obtained by the ring opening reaction between 5CC-PPGDGE and amine.Hybrid PHU material of TEPA type acquired the maximum crosslink density and intermolecular force.PHU of TETA obtained the maximum tensile strength and tear strength and followed by PHU of TEPA,and elongation at break of PHUs ruled on contrary.PHU of TETA and TEPA had the similar T_g and followed by DETA PHU.The order of thermal stability of PHUs was PHU-1 < PHU-2 < PHU-3 < PHU-4.
引文
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