含氟聚醚醚酮酮的制备及其性能

Synthesis and Characterization of Fluorine-containing Poly(ether ether ketone ketone)

以邻氟对苯二酚和4,4′-二氟三苯二甲酮为原料通过亲核缩聚反应,合成含氟聚醚醚酮酮(FPEEKK)材料。用FTIR、1HNMR和WAXD进行了结构表征,用DSC、TGA测试了热性能,并研究了聚合物的溶解性、吸水性、介电性能及光学性能。结果表明,含氟聚醚醚酮酮具有较好的热性能(N2气气氛中,5%热分解温度为505℃);能溶于氯仿、四氢呋喃和N,N-二甲基甲酰胺等有机溶剂;具有较低的吸水率(0.24%)和介电常数(ε=3.0);在近红外区1300和1550 nm处吸收非常弱。

Using o-fluorine hydroquinone and 1,4-di（4′-fluorobenzoyl）benzene as precursors,a fluorine-containing poly（ether ether ketone ketone） was prepared via a nucleophilic aromatic substitution polymerization.Fourier transform infrared spectra（FTIR）,nuclear magnetric resonance（1H NMR） and X-ray diffraction（XRD） were used to determine the structure of the polymer.Differential scanning calorimetry（DSC）,thermal gravimetric analysis（TGA） and near infrared spectra（NIR） were used to characterize the properties of the polymer.The solubility,water absorption,dielectric property and optical property of the polymer were investigated.The results show that FPEEKK is amorphous.The polymer shows high thermal stability（in nitrogen atmosphere,the degradation temperature for losing 5% mass is 505 ℃）.The polymer is soluble in common organic solvents such as chloroform,tetrahydrofuran（THF） and N,N-dimethylacetamide（DMAC）.The dielectric constant is 3.0 and the water absorption is 0.24%.The polymer exhibits low absorption at 1300 nm and 1550 nm wavelength.