含羧基氟化丙烯酸酯橡胶的合成与性能

Synthesis and properties of carboxyl-containing fluorinated acrylate rubber

以丙烯酸乙酯(EA)和丙烯酸丁酯(BA)为主单体,以丙烯酸和丙烯酸六氟丁酯(HFBA)分别为交联点单体和功能单体,通过半连续种子乳液聚合法制备出含羧基氟化丙烯酸酯橡胶。利用红外光谱和差示扫描量热仪对其结构进行表征,并研究了HFBA用量对丙烯酸酯橡胶水接触角以及硫化胶力学性能的影响。结果表明,随着HFBA用量的增加,所制备的丙烯酸酯橡胶的玻璃化转变温度升高,水接触角增大,硫化胶的拉伸强度提高,而断裂伸长率相应下降。

Carboxyl-containing fluorinated acrylate rubber was prepared with ethyl acrylate and butyl acrylate as main monomers,acrylic acid as crosslinking-point monomer and 2 ,2 ,3 ,4 ,4 ,4- hexafluorobutyl acrylate （HFBA） as functional monomer via semi-continuous seeded emulsion poly-merization method.The structure of the obtained acrylate rubber was characterized with FT-IR and DSC,nd the effect of HFBA amount on the water contact angle of the acrylate rubber and the me-chanical properties of the vulcanized rubber were investigated. The results showed that with the amount of HFBA increasing,the glass transition temperatures and the water contact angle of the ob-tained acrylate rubber increased,and the tensile strength of the vulcanized rubber increased,while the break at elongation correspondingly decreased.