智能出版平台
通过制备一种含有全氟壬烯基的含氟共聚物乳液,并考察其性能,研究了含氟单体对共聚物乳液性能的影响.以K2S2O8为引发剂,丙烯酸丁酯(BA)、甲基丙烯酸甲酯(MMA)和全氟壬烯基烯丙基醚(PFNAE)为共聚单体,采用半连续乳液聚合的方法,制备了带蓝色荧光的含氟乳液.用傅里叶红外(FT-IR)、接触角、差示量热扫描(DSC)和热重(TG)分析等手段对制备的PFNAE-BA-MMA共聚物(PBM)结构和性能进行表征.结果表明:引入含氟单体后,聚合物的疏水性、热稳定性、玻璃化温度(Tg)都有提高.水在含氟共聚物上的接触角随含氟单体用量的增加而增大,当PFNAE占单体总质量的25％时,水的接触角为94.9°;当PFNAE占单体总质量的20％时,共聚物在221℃开始分解,429.5℃分解完全,该共聚物Tg为8.5℃.PFNAE-BA-MMA共聚物具有一定的拒水性和良好的热稳定性.
The influence of fluorinated monomer on the properties of copolymer emulsion containing fluorine was investigated by preparing a fluorinated-copolymer latex perfluorononely and investing its properties.The fluorinated-copolymer emulsion with blue-fluorescence was prepared by semicontinuous emulsion polymerization initiated by K2S2O8 with butyl acrylate(BA),methyl methacrylate(MMA) and perfluorononely allyl ether(PFNAE) as polymerized monomers.The prepared PFNAE-BA-MMA copolymers(PBM) were characterized by Fourier transform infrared spectroscopy(FT-IR),contact angle measurement,differential scanning calorimetry(DSC) and thermo-gravimetric(TG) analysis,respectively.It was found that,when the fluorinated monomer PFNAE was introduced,the hydrophobicity,glass transition temperature(Tg) and thermal stability of the prepared copolymer will be improved.The water contact angle of prepared PBM with PFNAE contain of 25%(wt) is 94.9°,and when the PFNAE contain in the prepared PBM is 20%(wt),the copolymer begins to decompose at 221℃ and decomposes completely at 429.5℃;its glass transition temperature Tg is about 8.5℃.Finally,the prepared PBM were found to be good copolymers with hydrophobicity and heat stability.
