盐酸含量对光固化聚氨酯丙烯酸酯/SiO2杂化材料结构和性能的影响
Effects of Hydrochloric Acid Content on the Structure and Properties of UV-Curable Polyurethane-Acrylate/SiO2 Hybrid Material
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摘要: 由正硅酸乙酯水解制得的SiO2溶胶，在以γ—甲基丙烯酰氧丙基三甲氧基硅烷(TMSPM)为偶联剂的体系中，经溶胶-凝胶法制备了透明的光固化聚氨酯丙烯酸酯杂化材料(PUA—TMSPM)／SiO2。研究了盐酸浓度对(PUA-TMSPM)／SiO2结构与性能的影响。结果表明：随着pH值减小，硅溶胶体系和(PUA-TM-SPM)／SiO2杂化体系的热稳定性增大；盐酸摩尔分数XHCl的增加使(PUA-TMSPM)／SiO2光固化膜表面的两相界面结合更紧密，涂层变得更致密，并导致膜的硬度和耐磨性提高。Abstract: Silica sol (SiO2) was synthesized through the hydrolysis of tetraethoxysilane by using hydrochloric acid as a catalyst. UV curable, transparent hybrid material of urethane-acrylate resin(UA) with SiO2 was .prepared by the sol-gel process, u-sing 3-( trime
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