Five fluorine-containing vinyl ether monomers were prepared by the reaction between 2-vinyloxy ethanol, a fluorinated alcohol and hexafluorobenzene in the presence of sodium hydride in dimethylformamide. Two represent...Five fluorine-containing vinyl ether monomers were prepared by the reaction between 2-vinyloxy ethanol, a fluorinated alcohol and hexafluorobenzene in the presence of sodium hydride in dimethylformamide. Two representative properties of these monomers, UV-curing behavior initiated by a cationic photo-initiator PAG 201 and surface free energy of coating films, were investigated. Photo-polymerization proceeded both rapidly and completely with a high double-bond conversion （〉 90%） and a fast curing rate （maximum curing time 〈 21 s） for three monomers. The surface energies of the monomers and the resulting polymer films were then investigated. The minimum surface free energy of the UV-cured homopolymer films reaches 7.1 mJ/m2. X-ray photoelectron spectroscopy data show that the low surthce tension is influenced by fluorine content in the soft segments and fluorinated chains＇ migration to the surface. The five monomers exhibit low viscosity, low surface energy, good thermal stability and good photo-polymerization properties, which make them great candidates for UV coating and photoresist applications.展开更多
以丙烯酰胺(AM)和丙烯酰氧乙基三甲基氯化铵(DAC)为起始原料,采用氧化还原/偶氮类复合引发体系,在金属卤化物灯的辅助下,制备了性能优良的阳离子聚丙烯酰胺(CPAM)。最佳反应条件下所得产物的特性粘数可达13.87 d L·g^(-1),溶解时间...以丙烯酰胺(AM)和丙烯酰氧乙基三甲基氯化铵(DAC)为起始原料,采用氧化还原/偶氮类复合引发体系,在金属卤化物灯的辅助下,制备了性能优良的阳离子聚丙烯酰胺(CPAM)。最佳反应条件下所得产物的特性粘数可达13.87 d L·g^(-1),溶解时间38 min。利用红外光谱(FTIR)、核磁共振氢谱(~1H-NMR)对产物的结构进行了详细表征。进一步研究了CPAM用量和特性粘数对其助留助滤性能的影响,并与国外同类产品进行了助留助滤性能比较。展开更多
基金financially supported by the Beijing Municipal Natural Science Foundation(No.2112020)
文摘Five fluorine-containing vinyl ether monomers were prepared by the reaction between 2-vinyloxy ethanol, a fluorinated alcohol and hexafluorobenzene in the presence of sodium hydride in dimethylformamide. Two representative properties of these monomers, UV-curing behavior initiated by a cationic photo-initiator PAG 201 and surface free energy of coating films, were investigated. Photo-polymerization proceeded both rapidly and completely with a high double-bond conversion （〉 90%） and a fast curing rate （maximum curing time 〈 21 s） for three monomers. The surface energies of the monomers and the resulting polymer films were then investigated. The minimum surface free energy of the UV-cured homopolymer films reaches 7.1 mJ/m2. X-ray photoelectron spectroscopy data show that the low surthce tension is influenced by fluorine content in the soft segments and fluorinated chains＇ migration to the surface. The five monomers exhibit low viscosity, low surface energy, good thermal stability and good photo-polymerization properties, which make them great candidates for UV coating and photoresist applications.
文摘以丙烯酰胺(AM)和丙烯酰氧乙基三甲基氯化铵(DAC)为起始原料,采用氧化还原/偶氮类复合引发体系,在金属卤化物灯的辅助下,制备了性能优良的阳离子聚丙烯酰胺(CPAM)。最佳反应条件下所得产物的特性粘数可达13.87 d L·g^(-1),溶解时间38 min。利用红外光谱(FTIR)、核磁共振氢谱(~1H-NMR)对产物的结构进行了详细表征。进一步研究了CPAM用量和特性粘数对其助留助滤性能的影响,并与国外同类产品进行了助留助滤性能比较。
