| 摘要 |
Adherent metal coatings are provided on articles comprising a polyimide of 3,3',4,4'-tetracarboxybiphenyl and 4-aminoethyl ether by non-electrolytic metal deposition (e.g., physical vapor deposition or electroless deposition) following a treatment method comprising steps of contact with strong nitric acid, with strong sulfuric acid and with an aqueous alkaline permanganate solution, the first two steps being followed by a water rinse. The metallized article is then heat-treated for at least about 30 minutes at a temperature in the range of about 60-100 DEG C. Optional steps are treatment with an alkaline solution after sulfuric acid treatment and deposition of a further metal coating such as an electrolytic coating; said further metal deposition is also followed by a heat treatment step. |
