| 摘要 |
A method for making a copolymer polyimide resins. The method includes providing a first prepolymer component and a second prepolymer component. The first prepolymer component has the formula, E<SUB>1</SUB>-[R<SUB>1</SUB>]<SUB>n</SUB>-E<SUB>1 </SUB>and the second prepolymer component has the formula E<SUB>2</SUB>-[R<SUB>2</SUB>]<SUB>n</SUB>-E<SUB>2</SUB>, M<SUB>1</SUB>, or a combinations thereof. R<SUB>1 </SUB>and R<SUB>2 </SUB>have the formula: In the formulas, n is from about 1 to about 4; V is a tetravalent aromatic monocyclic or polycyclic linking structure; R is a divalent organic radical; E<SUB>1 </SUB>and E<SUB>2 </SUB>include crosslinkable functional groups. M<SUB>1 </SUB>includes a mixture of compounds selected from the group consisting of diamine compounds, dianhydride compounds, end group compounds, and combinations thereof. The process further includes blending the first and second prepolymer components to form a prepolymer mixture having a glass transition temperature of the mixture is greater than about 450° F. or the melt viscosity of the mixture is less than about 1000 centipoise.
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