机构地区: 暨南大学生命科学技术学院化学系
出 处: 《涂料工业》 2005年第3期10-13,共4页
摘 要: 以 2, 4, 6, 8-四甲基环四硅氧烷和乙烯基三甲氧基硅烷为原料,通过硅氢与乙烯基的加成反应一步合成了新型环状结构前驱体。前驱体与正硅酸乙酯(TEOS)在酸性条件下发生水解-缩合反应,制得了一种具有环状体型结构的新型有机-无机杂化涂料。采用FT-IR对合成的前驱体及杂化涂料进行了结构表征。热失质量 (TG)分析表明,杂化涂料的热稳定性良好。随TEOS用量的增加,杂化涂料的热稳定性提高。杂化涂料对金属的附着力 1级,光泽>130,铅笔硬度 5H^6H,耐冲击性>50cm。250g/200r耐磨性试验磨损值为 0 .003g,显示出优异的耐磨性能。 The title new cyclic precursor has been synthesized based on 2,4,6,8-tetrameth yl cyclotetrasiloxane and vinyl trimethoxysilane as raw materials by one-step ad dition of vinyl group with Si—H. The obtained precursor is then hydrolyzed and condensed with tetraethyl orthosilicate (TEOS) at lower pH environment, forming a organic-inorganic hybrid coatings with cyclic 3D structure. The structures of precursor and hybrid coatings are characterized by use of FT-IR. The heat loss d ata of TG indicated that the hybrid coatings shows good heat stability and incre ase with increasing of amount of TEOS. The adhesion of hybrid coatings is grade 1, gloss >130, pencil hardness 5~6 H, impact strength>50 cm, and abrasion resi stance (250 g/200 r) 0.003 g.