含有联苯结构的高含氟量聚芳醚的制备

Preparation of the Biphenyl-containing Polyarylethers with Highly Fluorinated Contents

聚芳醚（PAEs）具有优异的热稳定性和力学强度,已在航空航天、汽车和生物材料等获领域得了重要应用[1,2].将具有一定作用的功能性基团,如—F,—SO3H和—C≡CH等,引入到PAEs分子链中使这类材料获得特殊的性能是高性能高分子材料研究领域的重要课题[35].以Teflon和Nafion为代表的含氟聚合物在不粘涂层、

A trifluoromethyl-activated dichloro-monomer was synthesized via a two-step procedure including a formation of （4-chloro-3-trifluoromethyl）phenyldiazonium chloride and a coupling reaction. Derived from the dichloro-monomer, five fluorinated polyarylethers were prepared via a nucleophilic aromatic substitution polycondensation in the presence of K2CO3. The fluorinated polymers exhibited excellent thermal stability, and the temperatures at a 5% mass loss （ Ta.~,~ ） of several polymers were above 500 ~E. A highly fluorinated polyarylether had strong hydrophobicity, judging by its contact angle of 104. 7~. Also, these fluorine- containing polymers showed low refractive index and low dielectric constants. These highly-fluorinated polymers may be potential materials using as high-temperature coatings or thin films in optical and microelectronic fields.