一种耐高温憎水聚芳醚的合成与性能初步研究

以双酚芴单体和全氟联苯为原料,通过亲核取代反应,在较低温度(120℃)下直接聚合,得到了一种高分子量的含芴部分含氟的聚芳醚,并用1H-NMR进行表征.合成的聚合物具有好的热稳定性,玻璃化温度达到271℃,5%的热失重为420℃.这些聚合物能溶于四氢呋喃、二氯甲烷、氯仿和DMAC等常见的有机溶剂,通过溶液浇注的方法制备出光滑、柔韧的膜,并利用表面接触角(CA)对膜材料的表面性能进行了表征.用氯仿制备膜的接触角为102°,而用四氢呋喃制备膜的接触角为107°,接触角接近聚四氟乙烯(112°),具有较好的憎水性.

SYNTHESIS AND PRELIMINARY PROPERTIES OF A WATER-REPELLENT POLY(ARYLENE ETHER)

The objective of this work was to develop a kind of new polymer with high hydrophobicities and good thermal stabilities .The introduction of fluorine into poly(arylene ether) is regarded as an effective way. A partially fluorinated poly (arylene ether) containing fluorenyl groups was successfully synthesized by aromatic nucleophilic substituting polycondensation from bisphenols and decafluorobiphenyl at 120℃, and the structure of the polymer was characterized by ~1H-NMR. Number-average molecular weight characterized by GPC was 4.63 × 10~4 Da. The DSC and TGA measurements of the polymer were performed under a nitrogen atmosphere, and the results showed that the polymer exhibited good thermal stabilities with high T_g of 271℃ and 5 % mass loss at 420℃. Moreover, the polymer was very soluble in common organic solvents, such as CH_2 Cl_2, CHCl_3, dimethyl sulfoxide, N, N'-dimethylacetamide,and could be readily cast into tough and smooth films from solutions. The films also showed high contact angles of water. Contact angle of the film cast by CHCI3 is 102°. Contact angle of the film cast by THF is 107°, which is close to that of Teflon (112°), indicating that the polymer has high hydrophobicities. The polymer synthesized may have a promising prospect in microelectronic devices, such as the substrate for printed boards, and insulating materials as interlayer dielectrics and intermetal dielectrics.