含氟共聚物的制备及其对古砂岩的保护研究  

Synthesis of fluorinated copolymers and its conservation study on ancient stone buildings

作　　者：常刚[1] 梁军艳[1] 和玲[1] 王娜[1] 郑薇[1] 李伟东[2] 罗宏杰[2] 

机构地区：[1]西安交通大学理学院应用化学系,陕西西安710049 [2]中国科学院上海硅酸盐研究所,上海200050

出　　处：《化学研究与应用》2010年第6期794-799,共6页Chemical Research and Application

基　　金：国家自然科学基金资助项目(20474050)

摘　　要：本文选用丙烯酸丁酯(BA)和甲基丙烯酸甲酯(MMA)为非含氟单体,甲基丙烯酸十二氟庚酯(DFHM,C11H8O2F12)为含氟单体,分别获得了含氟丙烯酸酯共聚物乳液(BA/MMA/DFHM)和含氟丙烯酸酯共聚物溶液[P(BA-MMA-co-DFHM)],并分别选用毛细吸收法、喷涂法和刷涂法将其应用于古建筑砂岩的保护研究。结果表明:P(BA-MMA-co-DFHM)溶液因分子量小而容易渗到砂岩内部,在降低砂岩吸水率,提高耐紫外光和耐冻融老化性方面,更能起到良好的保护效果。In this paper,two typical fluorinated acrylic copolymers of dodecafluoroheptyl methacrylate（DFHM） with butyl acrylate（BA） and methyl methylacrylate（MMA） were prepared by semi-continuous seed emulsion polymerization and solution polymerization,respectively.One was BA/MMA/DFHM latex,and the other was P（BA-MMA-co-DFHM） solution.The resulting fluorinated acrylic copolymers were used as protective materials for ancient stone buildings by capillary absorption,spray and brush method.The results obtained showed that P（BA-MMA-co-DFHM） solution,due to its low molecular weigh,exhibited relatively good protective efficiency in reducing absorption of water after freeze/thaw and UV aging cycles with respect to BA/MMA/DFHM latex.

关 键 词：含氟聚合物 乳液 溶液 砂岩保护 

分 类 号：O631.4[理学—高分子化学]