摘要
以甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)等为主要单体,甲基丙烯酸六氟丁酯(HFMA)为含氟单体,N-羟甲基丙烯酰胺(NMA)为交联单体,采用种子乳液聚合法制备了自交联含氟丙烯酸酯共聚物乳液。研究了HFMA、NMA、复合乳化剂(SDS+OP-10)、引发剂(KPS)用量、聚合温度、聚合时间和搅拌速度等因素对聚合反应最终转化率和乳液稳定性的影响,结果表明在m(MMA)∶m(BA)=1∶1及搅拌速率210 r/min条件下,HFMA、NMA、SDS+OP-10和KPS加入量分别为总单体量的7%、3%、3%和0.5%(均为质量分数),以及聚合温度75℃、反应时间4 h时,制备得到的乳液单体总转化率高,乳液凝聚率低,聚合反应稳定,涂膜的综合性能优良。此外,含氟乳胶膜的FT-IR及TG-DSC分析结果表明,HFMA有效地参与了共聚反应,提高了涂膜的耐热性。
The self-crosslinking fluorinated acrylate copolymer emulsion was synthesized by seed emulsion polymerization, with methyl methacrylate （MMA）, butyl acrylate （BA） as main monomers and hexafluorobutyl methacrylate （HFMA） as fluorine-containing monomer, N-hydroxymethylacryiamide （NMA） as crosslinking monomer. The effects of such factors as HFMA, NMA, mixing emulsifier （SDS＋ OP- 10）, initiator （KPS）, polymerization temperature, polymerization time and stirring rate, on the total conversion of monomer and the emulsion stability were investigated. The results showed that the highest overall conversion of monomer and the lowest agglomeration were achieved when m（MMA） ： m（BA）=1 ： 1 and the amounts of HFMA, NMA, SDS＋OP-10andKPSwere7%, 3%, 3%and0.5%oftotalmonomers, respectively, and that emulsion polymerization could be stably carried out at 75℃ for 4h with 210 r/min stirring rate. Moreover, the copolymer films were characterized with Fourier transform infrared spectrum （Fr-IR）, thermogavimetry （TG） and differential scanning calorimetry （DSC）. The results show that HFMA was effectively involved in the copolymerization and that the film thermal stability was improved greatly.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2007年第10期1456-1461,共6页
Chemical Industry and Engineering Progress
基金
国家自然科学基金项目(No.20476035)。
关键词
含氟丙烯酸酯
乳液聚合
共聚物
涂膜
表征
fluorinated acrylate
emulsion polymerization
copolymer
film
characterization
