氟硅共聚改性提高聚丙烯酸酯力学和疏水性能的研究  

Study on improvement of mechanical and hydrophobic properties of polyacrylate by copolymerization with fluoro-compounds and silicone

作　　者：胡月 李凤艳[1] 蔚红建[2] 赵天波 HU Yue;LI Feng-yan;YU Hong-jian;ZHAO Tian-bo(School of Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Xi'an Modern Chemistry Research Institute,Xi'an 710065,China;School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京石油化工学院化学工程学院,北京102617 [2]西安近代化学研究所,陕西西安710065 [3]北京理工大学化学与化工学院,北京100081

出　　处：《现代化工》2021年第2期120-123,129,共5页Modern Chemical Industry

基　　金：国家自然科学基金项目(11472048)。

摘　　要：为改善聚丙烯酸酯表面能高、力学性能较差的缺点,以丙烯酸酯为主要单体,甲基丙烯酸十二氟庚酯、四甲基四乙烯基环四硅氧烷为功能单体,采用核壳乳液聚合法合成了水性聚氟硅丙烯酸酯。结果表明,四甲基四乙烯基环四硅氧烷可有效提高乳液膜的疏水角、断裂伸长率以及硬度;其质量分数为5%时,乳液的平均粒径为166.8 nm,转化率为98.6%;乳液膜的综合性能最好,其吸水率为3.9%,水接触角为131.3°,拉伸强度为2.3 MPa,断裂伸长率为929.7%,硬度为46.6 HA;与氟硅丙烯酸树脂相比,断裂伸长率提高了58.7%,水接触角提高了11.8%。In order to improve the surface energy and mechanical properties of polyacrylate,a water-borne polyfluorosilicone acrylate resin is synthesized through core-shell emulsion polymerization method with acrylate as main monomer,dodecafluoroheptyl methacrylate and tetramethyl tetravinyl cyclotetrasiloxane as functional monomers.Experimental results show that the addition of tetramethyl tetravinyl cyclotetrasiloxane can effectively improve the hydrophobic angle,elongation at break and hardness of the emulsion film. As the content of tetramethyl tetravinyl cyclotetrasiloxane is 5%,the average particle size of the emulsion is 166. 8 nm,the conversion rate reaches 98. 6%,and the comprehensive performance of the emulsion film will be the best with a water absorption rate of 3. 9%,a water contact angle of 131. 3°,a tensile strength of 2. 3 MPa,an elongation at break of 929. 7%,and a hardness of 46. 6 HA.Compared with fluorosilicone acrylic resin,the elongation at break increases by 58. 7% and the water contact angle increases by 11. 8%.

关 键 词：核壳乳液聚合 氟硅共聚改性 丙烯酸酯 疏水性 力学性能 

分 类 号：TQ633[化学工程—精细化工]