| 摘要 |
PURPOSE:To obtain a polyphenylene ether film having a good appearance and a permittivity differing little from that of PPE itself and being capable of forming film without detriment to the dielectric properties of PPE itself by reacting a polyphenylene ether resin which cannot give a film having surface smoothness and a good appearance when formed by the solvent film formation process with an unsaturated carboxylic acid or anhydride. CONSTITUTION:A reaction product is obtained by extruding poly(2,6-dimethyl-1,4- phenylene ether) and maleic anhydride on a twin-screw extruder. When this product is dissolved in various solvents and resulting soutions are cast on glass plates, films of good appearances can be obtained. |
