丙烯酸乙酯-甲基丙烯酸甲酯共聚物结构中红外光谱研究OA

The synthesis process of ethyl acrylate-methyl methacrylate(EA-MMA)copolymer aqueous dis-persion was explored.The structure of the freeze-dried powder of EA-MMA copolymer aqueous dispersion(hereinafter referred to as EA-MMA copolymer)was studied by using mid infrared(MIR)spectroscopy.The experiments found that the infrared absorption modes of EA-MMA copolymer structure mainly included:EA-MMA copolymer C=O functional group stretching vibration mode(νC=O-EA-MMA copolymer),EA-MMA copolymer CH3 functional group asymmetric bending vibration mode(δas CH3-EA-MMA copolymer),EA-MMA copolymer CH3 func-tional group symmetric bending vibration mode(δs CH3-EA-MMA copolymer),emulsifier aryl C=C functional group stretc-hing vibration mode(νC=C-emulsifier),and a mixed mode of EA-MMA copolymer and emulsifier C-O functional group stretching vibration(νC-O-emulsifier+νC-O-EA-MMA copolymer).The structures of EA-MMA copolymers from differ-ent manufacturers were basically similar.A systematic structure study was conducted on common emulsifiers,and it was concluded that the emulsifiers in the samples mainly included nonylphenol polyoxyethylene ether and octyl-phenol polyoxyethylene ether.Further semi-quantitative research was carried out on emulsifiers in EA-MMA co-polymers.There were also certain differences in the types and relative contents of emulsifiers in EA-MMA copol-ymers.MIR spectroscopy can quickly conduct research on the synthesis process of special medical textile materi-als EA-MMA copolymer aqueous dispersions.