Synthesis and Characterization of Polyurethane Modified by Fluorinated Acrylate with Core-shell Structure
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    Abstract:

    A series of FPUA hybrid emulsions with core-shell structure were synthesized by methyl methylacrylate (MMA), butyl acrylate (BA) and dodecafluoroheptyl methacrylate (G04), with the double-bond caped polyurethane as reactable macromolecule and potassium nonafluoro-1-butanesulfonate as fluorinated emulsifier. The structure of copolymer was characterized through Fourier transform infrared spectrometer (FT-IR) and and the particle morphology of hybrid emulsion latex was observed by transmission electron microscopy (TEM). Contact angles, tensile test and thermogravimetry (TG) were taken on the film to research water resistance, mechanical and thermo properties of the resins modified by acrylate and fluorinated acrylate. The results stated, when the mass fraction of fluorinated emulsifier and fluorinated monomer were 0.15% and 20% mass of all monomers respectively, the FPUA emulsion showed good stability. Surface energy of the sample declined from 45.6dyn/cm to 22.5dyn/cm and the copolymer showed excellent refusal of water and oil. The temperatures of rapidest mass loss increased from 348℃ to 398℃.

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History
  • Received:July 06,2011
  • Revised:September 04,2011
  • Adopted:September 08,2011
  • Online: October 25,2011
  • Published:
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