| 摘要 |
Polyimides or poly(amide-imides), especially those containing a polysiloxane unit are improved by heating such polymers or their polyamic acid precursors with a polyfunctional aromatic compound. The polyfunctional aromatic compound is one which contains at least two reactive groups which may be -NH2, -COOH, -OH or secondary amino groups with at least one of the reactive groups being -NH2 or -COOH.
|
