高固低粘丙烯酸酯无皂乳液的合成及性能研究
廖虎 , 魏铭 , 林泳岐 , 王旭 , 朱飞 , 夏雪 , 黄挺
现代化工 ›› 2025, Vol. 45 ›› Issue (S1) : 349 -354.
高固低粘丙烯酸酯无皂乳液的合成及性能研究
Synthesis and performance study of emulsifier-free acrylic emulsion with high-solid content and low-viscosity
1-Allyloxy-3-(4-nonylphenol)-2-propanol polyoxyethylene (10) ether sulfate ammonium (DNS-86) is used as a polymerizable emulsifier,combined with Tween-80 as a co-emulsifier,an emulsifier-free acrylic ester emulsion with high-solid and low-viscosity is successfully prepared via semi-continuous seeded emulsion polymerization method.The impacts of reaction time,reaction temperature,and stirring speed on the solid content,viscosity,gel rate,and stability of the emulsion are explored.Structural and compositional characterizations of the emulsion and its coated film are performed by means of FT-IR,1H-NMR,particle size analysis,TEM,and GPC.It is indicated by the results that the emulsifier-free acrylic ester emulsion has a solid content of 60.29%,a viscosity of 125 mPa·s,a low gel rate of 0.93%,and an excellent stability when it is prepared under the optimal conditions that reaction time is 3.5 h,reaction temperature is 77℃,and stirring speed is 300 rpm.The polymerizable emulsifier used is completely polymerized and successfully grafted onto the polymer backbone.The latex particles exhibit a core-shell spherical morphology with an average particle size of 371.8 nm,which facilitates the formation of a compact structure.PDI and Zeta potential of the emulsion system are 0.055 and -44.9 mV,respectively,indicating good monodispersity and charge stability.
高固低粘 / 稳定性 / 可聚合性乳化剂 / 丙烯酸酯 / 无皂乳液
high solid content and low viscosity / stability / polymerizable emulsifier / acrylate / emulsifier-free emulsion
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