A kind of preparation method of polyimide film with high elongation at break
A technology of polyimide film and elongation, which is applied in the field of modification of organic polymer materials, can solve problems such as complicated operation, and achieve the effect of simple operation of the preparation method, excellent mechanical properties, and improved elongation at break
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0031] (1) In a 100 ml three-necked flask equipped with a nitrogen inlet and mechanical stirring, add 2.0024 g (0.01 mol) of 4,4'-diaminodiphenyl ether (ODA) to 18 ml of the organic solvent N,N-dimethylene Dissolve in acetamide (DMAc) with stirring. When the diamine was completely dissolved, 2.2248 grams (0.0102 mol) of pyromellitic dianhydride (PMDA) was added in 4 portions with stirring. The solution was stirred in an ice-water bath for 12 hours to obtain a viscous solution of polyamic acid with a solid content of 20%. After the reaction, 33 ml of N,N-dimethylacetamide was added to the solution to reduce the solid content of the polyamic acid solution to 8% to obtain a polyamic acid solution;
[0032](2) 1.2916 g (0.01 mol) of isoquinoline was added to the polyamic acid solution, and 17 ml of N,N-dimethylacetamide was added, and stirred at room temperature for 2 hours to obtain a polyamic acid salt solution. Then, 1.0209 g (0.01 mol) of acetic anhydride and 0.791 (0.01 mol...
Embodiment 2
[0035] (1) prepare polyamic acid solution according to the method of step (1) in embodiment 1;
[0036] (2) 1.5499 g (0.012 mol) of isoquinoline was added to the polyamic acid solution, and 20 ml of N,N-dimethylacetamide was added, and stirred at room temperature for 2 hours to obtain a polyamic acid salt solution. Then add 0.8167 g (0.008 mol) of acetic anhydride and 0.6328 (0.008 mol) of pyridine to the solution, and stir at room temperature for 4 hours to obtain a polyamic acid salt-polyimide solution;
[0037] (3) Prepare a PI film according to the method of step (3) in Example 1.
Embodiment 3
[0039] (1) prepare polyamic acid solution according to the method of step (1) in embodiment 1;
[0040] (2) 1.8082 g (0.014 mol) of isoquinoline was added to the polyamic acid solution, and 23 ml of N,N-dimethylacetamide was added, and stirred at room temperature for 2 hours to obtain a polyamic acid salt solution. Then add 0.6125 g (0.006 mol) of acetic anhydride and 0.4746 (0.006 mol) of pyridine to the solution, and stir at room temperature for 4 hours to obtain a polyamic acid salt-polyimide solution;
[0041] (3) Prepare a PI film according to the method of step (3) in Example 1.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More