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
以聚醚二元醇(N210)、异佛尔酮二异氰酸酯(IPDI)、羟基硅油为原料,合成了异氰酸酯基封端的含硅聚氨酯预聚体(PU-Si),再以PU-Si、环氧树脂E-51、丁基缩水甘油醚单封端的四乙烯五胺(TEPA-660a)为主要原料,制备了含硅聚氨酯改性水性环氧树...以聚醚二元醇(N210)、异佛尔酮二异氰酸酯(IPDI)、羟基硅油为原料,合成了异氰酸酯基封端的含硅聚氨酯预聚体(PU-Si),再以PU-Si、环氧树脂E-51、丁基缩水甘油醚单封端的四乙烯五胺(TEPA-660a)为主要原料,制备了含硅聚氨酯改性水性环氧树脂固化剂,将制得的环氧树脂固化剂与环氧树脂E-51混和制得固化膜。用FTIR、TEM、SEM、TG和水接触角测试仪对聚合物的结构与性能进行了表征与测试,并考察了PU-Si含量对固化剂乳化性能、固化膜力学性能、热性能、断面形貌及吸水率的影响。结果表明:当固化膜中PU-Si的质量分数达到18%时,固化膜的综合性能最佳,此时冲击强度为22.45 k J/m^2,拉伸强度为44.7 MPa,热失重5%和50%时的温度分别为205.0和373.8℃,水接触角为96.8°,吸水率仅1.35%,与纯环氧树脂固化膜相比,其柔韧性、耐热性、耐水性等性能均有显著提高。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.
文摘以聚醚二元醇(N210)、异佛尔酮二异氰酸酯(IPDI)、羟基硅油为原料,合成了异氰酸酯基封端的含硅聚氨酯预聚体(PU-Si),再以PU-Si、环氧树脂E-51、丁基缩水甘油醚单封端的四乙烯五胺(TEPA-660a)为主要原料,制备了含硅聚氨酯改性水性环氧树脂固化剂,将制得的环氧树脂固化剂与环氧树脂E-51混和制得固化膜。用FTIR、TEM、SEM、TG和水接触角测试仪对聚合物的结构与性能进行了表征与测试,并考察了PU-Si含量对固化剂乳化性能、固化膜力学性能、热性能、断面形貌及吸水率的影响。结果表明:当固化膜中PU-Si的质量分数达到18%时,固化膜的综合性能最佳,此时冲击强度为22.45 k J/m^2,拉伸强度为44.7 MPa,热失重5%和50%时的温度分别为205.0和373.8℃,水接触角为96.8°,吸水率仅1.35%,与纯环氧树脂固化膜相比,其柔韧性、耐热性、耐水性等性能均有显著提高。
