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该文研究了核壳型短链含氟丙烯酸酯乳液的合成与表征。以甲基丙烯酸甲酯(MMA)和丙烯酸丁酯(BA)的共聚体为核,短氟碳链2-(全氟己基)乙基甲基丙烯酸酯(FMA6)和非氟烷基丙烯酸酯的共聚体为壳,采用多步乳液聚合法,合成系列具有核壳结构的含氟丙烯酸酯乳液,研究了壳相中氟单体用量和非氟烷基丙烯酸酯的烷基链长度n(链长n=4、8、12、16、18)对产物疏水疏油性能的影响,并对产物进行表征。结果表明:当采用氟单体用量为总单体质量的8.5%,甲基丙烯酸十六酯(CMA)的共聚体为壳层时,由合成乳液制得的乳胶膜的疏水疏油性最佳,对水接触角为124.67°,对二碘甲烷接触角为112.76°。FTIR、TEM和DSC/TGA表征表明,原料单体均参加了反应;乳液颗粒具有明显的核壳结构;聚合物存在两个玻璃化温度(-18.87℃和32.08℃),热分解温度比不含氟的聚合物提高了近20℃。由此说明,用合成的核壳型短链含氟丙烯酸酯乳液制得的涂膜具有优异的疏水疏油性和耐热性能。
In this paper, the synthesis and characterization of core-shell short-chain fluorinated acrylate emulsions were studied. The copolymer of short chain fluorocarbon 2- (perfluorohexyl) ethyl methacrylate (FMA6) and non-fluoroalkyl acrylate with the copolymer of methyl methacrylate (MMA) and butyl acrylate (BA) Copolymer was shell, and a series of fluorinated acrylate emulsion with core-shell structure was synthesized by multi-step emulsion polymerization. The effects of the amount of fluoromonomer in the shell phase and the alkyl chain length n of non-fluoroalkyl acrylate n = 4, 8, 12, 16, 18) on the hydrophobic and oleophobic properties of the product, and the product was characterized. The results showed that when the amount of fluorinated monomer is 8.5% of the total monomer mass and the copolymer of cetyl methacrylate (CMA) is shell, the hydrophobic and oleophobic properties of latex film prepared from synthetic emulsion are the best, The contact angle to water was 124.67 ° and the contact angle to diiodomethane was 112.76 °. The FTIR, TEM and DSC / TGA characterization indicated that all the monomers were involved in the reaction. The emulsion particles had obvious core-shell structure. There were two glass transition temperatures (-18.87 ℃ and 32.08 ℃) Fluoropolymers increase by nearly 20 ° C. This shows that the use of synthetic core-shell short-chain fluorinated acrylate emulsion prepared film has excellent hydrophobic oleophobic and heat resistance.