基于丁香酚的全氟环丁基芳基醚聚合物的合成与性能表征

Synthesis and characterization of perfluorocyclobutyl ether polymers based on eugenol

为了实现可持续发展,以可再生的生物质原料制备高性能高分子材料成为关注重点。本文以丁香酚为原料,通过氟烷基化反应、硅氢加成反应、消除反应和Piers-Rubinsztajn反应合成了三种含有硅氧烷结构的三氟乙烯基芳基醚(TFVE)单体。利用核磁共振光谱测试(NMR)、傅里叶红外光谱测试(FT-IR)、差示扫描量热分析(DSC)、动态热机械分析(DMA)、拉伸测试、热重分析(TGA)、介电常数测试等对TFVE单体结构、固化行为及固化样品的各项性能进行分析。结果表明三种生物基TFVE单体可以通过TFVE基团的热环化反应转化为全氟环丁基芳基醚(PFCB)聚合物。固化样品具有出色的热稳定性和介电性能,5%热分解温度分别为405、381和394℃,1 kHz~10 MHz内平均介电常数分别为2.78、3.26和3.11。该工作提供了利用生物多酚制备高性能聚合物的新思路。

In order to achieve sustainable development,the preparation of high-performance polymer materials from the renewable biomass materials has become the focus of attention.In this paper,three siloxane-containing trifluorovinyl-ether(TFVE)monomers,were synthesized from eugenol by the reaction of fluoroalkylation,hydrosilylation reaction,elimination reaction,and Piers-Rubinsztajn reaction.The structure and curing behavior of these TFVE monomers,and the properties of the cured samples were analyzed by 1 H NMR,19 F NMR,fourier transform infrared spectroscopy,differential scanning calorimetry analysis,dynamic thermomechanical analysis,tensile test,thermogravimetric analysis,and dielectric constant.The results show that three bio-based TFVE monomer can transfer to perfluorocyclobutyl ether(PFCB)polymers by the thermocyclization of TFVE groups.The cured samples show excellent thermostability and dielectric properties,the 5%weight loss temperature are 405,381,and 394℃,respectively,and the average dielectric constant of these are 2.78,3.26,and 3.11,respectively,for the frequencies varying from 1 kHz to 10 MHz.This work provides a new way for the preparation of high-performance polymers from bio-phenols.