摘要
以甲苯-2,4-二异氰酸酯、丙烯酸羟丙酯、丁二酸酐、超支化聚酯为原料,合成了一种新型可紫外光固化的水性超支化聚氨酯丙烯酸酯(Water-soluble hyperbranched polyurethane acrylate,WHPUA),采用傅里叶变换红外光谱分析了其合成过程中基团的变化,并对WHPUA系列水分散体水溶性质进行了研究.结果表明,随着单个分子中羧基含量的增加,WHPUA水溶性增大,黏度升高,表面张力降低,粒径减小;随着超支化聚酯代数的增加,WHPUA粒径增加;羧基中和度的增加有利于增加预聚物表面的羧基离子的密度,从而使WHPUA的粒径减小,体系的黏度也随之降低.
A kind of novel water-soluble hyperbranched polyurethane acrylate（WHPUA） was synthesized based upon the raw materials of toluene 2,4-diisocyanate（TDI）,hydroxypropyl acrylate（HPA）,succinic anhydride（SA） and hyperbranched aliphatic polyester（HBPE）.The transformations of different groups were characterized using Fourier Transform Infrared during the synthesis process.The solubility experiment of WHPUA system suggest that an increase of carboxyl group content would result in decrease of particle size due to improved water solubility,increased viscosity,and reduced surface tension.The particle size of WHPUA was increased with the increase of hyperbranched polyester generation.Increased neutralization degree would be favorable for the increase of distribution of carboxylions on prepolymer surface,leading to decrease of WHPUA particle size and viscosity of the system.
出处
《仲恺农业工程学院学报》
CAS
2010年第2期43-47,共5页
Journal of Zhongkai University of Agriculture and Engineering
