含氟超支化聚酯的合成及其性能研究

Synthesis and properties of fluorine-containing hyperbranched polyester

利用十三氟辛酸对超支化聚酯进行端基改性,得到了含氟超支化聚酯。采用傅里叶变换红外光谱仪、差示扫描量热分析仪等对聚合物进行了表征和分析。结果表明:十三氟酸成功接枝到超支化聚酯上,含氟超支化聚酯的玻璃化转变温度为-20.5℃,含氟超支化聚酯溶液在固含量高达70%时仍具有较低的黏度,该聚合物成膜性好,涂膜的附着力为1级,柔韧性为1 mm,铅笔硬度2 H,抗冲击强度4.9 J/cm2,与水的接触角为105°,具有良好的表面疏水性。

The fluoride-containing byperbranched polyester was prepared by the terminal group modification of hyperbranched polyester with trideeafluorooctanoic acid. The polymer was characterized and analyzed by Fourier transform infrared spectrometry and differential scanning calorimetry. The results showed that tridecafluorooctanoic acid was successfully grafted on hyperbranched polyester; the fluoride-containing hyperbranehed polyester had the glass transition temperature of - 20.5℃and the solution thereof exhibited low viscosity and good film forming ability as the solid content was up to 70% ; and the film had adhesion grade 1, flexibility 1 mm, pencil hardness 2 H, anti-impact strength 4.9 J/cm2, water contact angle 105° and favorable surface hydrophobicity.