乳液聚合交联改性提高疏水性氟代丙烯酸酯的力学性能  

Crosslinking modification by emulsion polymerization for improving the mechanical properties of hydrophobic fluoroacrylate

作　　者：胡月 李凤艳[1] 赵天波 HU Yue;LI Fengyan;ZHAO Tianbo(School of Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院化学工程学院,北京102617 [2]北京理工大学化学与化工学院,北京100081

出　　处：《电镀与涂饰》2020年第4期188-194,共7页Electroplating & Finishing

基　　金：国家自然科学基金（11472048）

摘　　要：为了改善丙烯酸酯的力学性能,以丙烯酸酯为主要单体,甲基丙烯酸十二氟庚酯为功能单体,1,4−丁二醇二丙烯酸酯(BDDA)为交联剂,采用核壳乳液聚合法合成了水性含氟丙烯酸酯。考察了反应条件,并对乳液的稳定性、粒径,以及乳液膜的拉伸强度、断裂伸长率、硬度、水接触角和化学结构进行了表征。结果表明,BDDA的加入可以有效提高乳液膜的拉伸强度、断裂伸长率及硬度。当BDDA占单体质量3%时,乳液的平均粒径为63.8 nm,转化率为99.2%,乳液膜的综合性能最好,分别为:吸水率4.9%,水接触角98.8°,拉伸强度1.94 MPa,断裂伸长率743.6%,硬度45.6 HA。其拉伸强度和断裂伸长率分别是未改性含氟丙烯酸酯乳液膜的1.73倍和1.46倍。To improve the mechanical properties of acrylate,an aqueous fluorinated acrylate was synthesized by core-shell emulsion polymerization from several acrylates with dodecafluoroheptyl methacrylate as a functional monomer and 1,4-butanediol diacrylate(BDDA)as crosslinker.The reaction conditions were studied,the stability and particle size of the emulsion,as well as the tensile strength,elongation at break,hardness,water contact angle,and chemical structure of the latex film were characterized.The results showed that the addition of BDDA could effectively improve the tensile strength,elongation at break,and hardness of the latex film.The emulsion prepared with 3wt.%of BDDA with respect to the mass of monomers had an average particle size of 63.8 nm,and a conversion rate of 99.2%,and the latex film obtained therefrom had the best comprehensive performance shown as follows:water absorption rate 4.9%,water contact angle 98.8°,tensile strength 1.94 MPa,elongation at break 743.6%,and hardness 45.6 HA.Its tensile strength and elongation at break were respectively 1.73 and 1.46 times that of the unmodified fluoroacrylate latex film.

关 键 词：氟代丙烯酸酯 1 4−丁二醇二丙烯酸酯 交联改性 核壳乳液聚合 疏水性 

分 类 号：TQ633[化学工程—精细化工]