Modeling of poly(amic acid) and polyimide reactors
β Scribed by S. K. Verma; Santosh K. Gupta
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 362 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0021-8995
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β¦ Synopsis
A comprehensive kinetic model is presented which accounts for the major and side reactions present in poly(amic acid) and polyimide reactors. The mathematical framework is quite general and permits incorporation of heat-and mass-transfer aspects typically encountered in large-scale reactors. A few rate constants were curvefitted using some (limited) experimental data available in the open literature. Using these (and the other rate constants from the literature), some interesting phenomena have been predicted at higher temperatures. Detailed experimental data are required to evaluated all the rate constants with precision.
π SIMILAR VOLUMES
The elastic modulus E l of the crystalline regions in the direction parallel to the chain axis was measured by X-ray diffraction for polyimide derived from polyamic acid (biphthalic dianhydride and p-phenylene diamine). These specimens were cured by two different routes: curing at 200 Β°C, and at 400