含氟丙烯酸酯改性聚氨酯核壳乳液的制备及表征
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安徽省自然科学基金(070414193)


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

    以双键封端水性聚氨酯为反应型高分子,全氟丁基磺酸钾为乳化剂,实现甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、甲基丙烯酸十二氟庚酯(G04)和聚氨酯的共聚,制备具有核壳结构的含氟丙烯酸酯改性聚氨酯乳液(FPUA)。傅里叶红外光谱(IR)和透射电子显微镜(TEM)对共聚物组成、乳胶粒的形态进行表征,并通过表面接触角、拉伸试验和热重分析等分别研究了FPUA胶膜的表面能,力学性能和热性能。结果表明,当含氟乳化剂和氟单体用量分别为单体总量的0.15%和20%时,乳液稳定性好,聚合物胶膜表面能由45.6dyn/cm下降至22.5dyn/cm,表现出良好的疏水疏油性,最大热失重速率温度由348℃提高至398℃。

    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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张明月,张晓亮,陈广美,黄毅萍,吴立霞.含氟丙烯酸酯改性聚氨酯核壳乳液的制备及表征[J].精细化工,2011,28(11):

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  • 收稿日期:2011-07-06
  • 最后修改日期:2011-09-04
  • 录用日期:2011-09-08
  • 在线发布日期: 2011-10-25
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