By using HDI and TMP as the main raw materials,polyethylene glycol 400(PEG400)is used as a non-ionic hydrophilic modifier,and sodium hydroxyethyl sulfonate is used as an ionic hydrophilic modifier to synthesize a dual...By using HDI and TMP as the main raw materials,polyethylene glycol 400(PEG400)is used as a non-ionic hydrophilic modifier,and sodium hydroxyethyl sulfonate is used as an ionic hydrophilic modifier to synthesize a dual hydrophilic modified polyurethane curing agent.Research revealed that introducing PEG400 for hydrophilic chain segments and sodium hydroxyethyl sulfonate for hydrophilic ionic groups in the polyurethane curing agent component leads to a uniform distribution of hydrophilic components,significantly enhancing compatibility with the aqueous polyol component,and results in excellent film performance.The synthesis process and film were characterized using Fourier transform infrared spectroscopy and high-resolution scanning electron microscopy in the study.展开更多
以1,4-丁二醇(BDO)、聚己二酸丁二醇酯二醇PBA-2000、聚氧化丙烯三醇PPT-3000、聚氧化丙烯二醇PPG-2000、聚氧化丙烯二醇PPG-1000、聚己二酸新戊二醇酯二醇PNA-1000、N,N-二甲基甲酰胺(DMF)、甲苯二异氰酸酯(TDI-80)以及丁酮肟(MEKO)为...以1,4-丁二醇(BDO)、聚己二酸丁二醇酯二醇PBA-2000、聚氧化丙烯三醇PPT-3000、聚氧化丙烯二醇PPG-2000、聚氧化丙烯二醇PPG-1000、聚己二酸新戊二醇酯二醇PNA-1000、N,N-二甲基甲酰胺(DMF)、甲苯二异氰酸酯(TDI-80)以及丁酮肟(MEKO)为原料合成了高固含量封闭型聚氨酯预聚体树脂。以胺类固化剂固化上述封闭型预聚体,得到聚氨酯膜。研究了二乙烯三胺(DETA)、DETA+4,4′-二氨基二环己基甲烷(HMDA)和DETA+HMDA+聚醚胺(D-400)复配固化剂对固化物性能的影响。结果表明,DETA固化所需温度最低,HMDA部分替代DETA后固化时间缩短,这3种固化剂与树脂体系在125℃以下都可实现充分固化,145℃下能实现快速固化。制备超软聚氨酯革树脂的最优工艺条件:100.0 g树脂+0.26 g DETA/0.25 g HMDA/0.6 g D-400+30.0 g DMF+1.0 g BYK-L9565,50℃下初始黏度为3500 mPa·s,得到聚氨酯膜弹性模量为0.49 MPa,伸长率为812%,拉伸强度为8.2 MPa,70℃/RH95%湿热老化试验条件下拉伸强度保留率不低于80%的时间为3周。展开更多
文摘By using HDI and TMP as the main raw materials,polyethylene glycol 400(PEG400)is used as a non-ionic hydrophilic modifier,and sodium hydroxyethyl sulfonate is used as an ionic hydrophilic modifier to synthesize a dual hydrophilic modified polyurethane curing agent.Research revealed that introducing PEG400 for hydrophilic chain segments and sodium hydroxyethyl sulfonate for hydrophilic ionic groups in the polyurethane curing agent component leads to a uniform distribution of hydrophilic components,significantly enhancing compatibility with the aqueous polyol component,and results in excellent film performance.The synthesis process and film were characterized using Fourier transform infrared spectroscopy and high-resolution scanning electron microscopy in the study.
文摘以1,4-丁二醇(BDO)、聚己二酸丁二醇酯二醇PBA-2000、聚氧化丙烯三醇PPT-3000、聚氧化丙烯二醇PPG-2000、聚氧化丙烯二醇PPG-1000、聚己二酸新戊二醇酯二醇PNA-1000、N,N-二甲基甲酰胺(DMF)、甲苯二异氰酸酯(TDI-80)以及丁酮肟(MEKO)为原料合成了高固含量封闭型聚氨酯预聚体树脂。以胺类固化剂固化上述封闭型预聚体,得到聚氨酯膜。研究了二乙烯三胺(DETA)、DETA+4,4′-二氨基二环己基甲烷(HMDA)和DETA+HMDA+聚醚胺(D-400)复配固化剂对固化物性能的影响。结果表明,DETA固化所需温度最低,HMDA部分替代DETA后固化时间缩短,这3种固化剂与树脂体系在125℃以下都可实现充分固化,145℃下能实现快速固化。制备超软聚氨酯革树脂的最优工艺条件:100.0 g树脂+0.26 g DETA/0.25 g HMDA/0.6 g D-400+30.0 g DMF+1.0 g BYK-L9565,50℃下初始黏度为3500 mPa·s,得到聚氨酯膜弹性模量为0.49 MPa,伸长率为812%,拉伸强度为8.2 MPa,70℃/RH95%湿热老化试验条件下拉伸强度保留率不低于80%的时间为3周。
