论文部分内容阅读
以丙酮酸、苯甲醚为原料合成了1,1-双(4-甲氧基苯基)(BMPE)乙烯单体,并通过去甲基反应得到了含可交联基团的二酚单体1,1-双(4-羟基苯基)乙烯(BHPE),并且用核磁共振、飞行质谱及元素分析表征了单体的结构,DSC测试了单体的熔点.并将BHPE与全氟联苯(DFBP)在氟化钾和氢化钙的催化作用低温下进行缩聚反应,得到了一种可紫外辐照交联的氟代聚芳醚.通过核磁共振证明了所合成的单体以及聚合物的结构,凝胶渗透色谱(GPC)测定了聚合物的分子量.傅立叶变换红外光谱分析了聚合物紫外辐照下的交联反应.所合成的氟代聚芳醚在室温下可溶于氯仿、四氢呋喃等有机溶剂,紫外交联后不溶于任何有机溶剂.且合成的聚合物具有良好的热稳定性能(玻璃化转变温度为160℃,交联后的5%热失重为465℃).
The 1,1-bis (4-methoxyphenyl) (BMPE) ethylene monomer was synthesized from pyruvic acid and anisole. The diphenols with crosslinkable groups were obtained by the demethylation reaction The structure of 1,1-bis (4-hydroxyphenyl) ethylene (BHPE) was characterized by means of nuclear magnetic resonance, mass spectrometry and elemental analysis. The melting point of the monomer was measured by DSC. Benzene (DFBP) was polycondensed at low temperatures under the catalysis of potassium fluoride and calcium hydride to obtain a fluorinated polyarylene ether crosslinkable by ultraviolet radiation. The results of NMR showed that the synthesized monomers and polymers The molecular weight of the polymer was determined by gel permeation chromatography (GPC) .Fourier transform infrared spectroscopy (FTIR) was used to analyze the cross-linking reaction of the polymer under UV irradiation.The fluorinated polyarylene ether synthesized was soluble in chloroform at room temperature, Tetrahydrofuran and other organic solvents, which are insoluble in any organic solvents after UV crosslinking, and the synthesized polymers have good thermal stability (glass transition temperature is 160 ℃, 5% weight loss after crosslinking is 465 ℃).