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采用溶液聚合法合成了含氟丙烯酸酯共聚物。结果表明,采用同时滴加法将含氟单体加入聚合体系时,合成的含氟丙烯酸酯共聚物稳定、透明。随着含氟单体用量的提高,所合成的共聚物在不锈钢底材表面涂层的附着力先是基本不变,而后降低;水滴在涂层表面的接触角则先提高,而后基本不变。综合聚合物稳定性、涂层附着力、疏水性各方面因素,氟单体用量应在15%~20%范围为宜。采用红外光谱表征了合成聚合物的结构,并且用DSC法验证了所合成的产物为均一的共聚物,玻璃化转变温度为83.5℃,具有一定的耐热性。水滴在该共聚物涂层表面的接触角为116.8°,且涂层具有良好的耐水性和耐汽油性;铅笔硬度达到2H;在不锈钢底材表面的附着力为11.55MPa,是一种性能良好的疏水涂层。
Fluorinated acrylate copolymers were synthesized by solution polymerization. The results showed that the fluorinated acrylic copolymer was stable and transparent when the fluorinated monomer was added into the polymerization system by simultaneous dropwise addition. With the increase of the amount of fluorinated monomer, the adhesion of the synthesized copolymer on the surface of the stainless steel substrate first remains unchanged and then decreases; the contact angle of the water droplets on the surface of the coating first increases, and then does not change substantially. Synthetic polymer stability, coating adhesion, hydrophobicity in all aspects, the amount of fluorine monomer should be 15% ~ 20% range is appropriate. The structure of the synthesized polymer was characterized by infrared spectroscopy. The synthesized product was confirmed by DSC to be a homogeneous copolymer with a glass transition temperature of 83.5 ℃ and a certain heat resistance. The contact angle of the water drop on the surface of the copolymer coating is 116.8 °, and the coating has good water resistance and gasoline resistance; the pencil hardness reaches 2H; and the adhesion on the stainless steel substrate surface is 11.55 MPa, which is a good performance Hydrophobic coating.