Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 136, Issue 34, Pages -Publisher
WILEY
DOI: 10.1002/app.47883
Keywords
dielectric properties; films; polyimides; thermal properties
Categories
Funding
- National key research and development program of China [2016YFB0100600]
Ask authors/readers for more resources
Polymer dielectrics with outstanding heat resistance and advanced dielectric properties are of great importance for high-temperature capacitors in the applications of hostile circumstances. In this work, a series of aromatic carbonyl-containing polyimides (CPI) are prepared from the carbonyl dianhydride and different diamines. The correlation between molecular structure (i.e., different linked structure (O, CH2, SO2) in diamines, the length of repeating unit and the linked position (para-para or meta-meta), and properties is revealed in detail to obtain CPI dielectrics with excellent thermal resistance (glass transition temperature, T-g: 241352 degrees C), reasonably high dielectric constant (3.995.23), low dissipation factor (0.003070.00395), and admirable breakdown strength (425552 MV/m) simultaneously. Particularly, CPI-5 with carbonyl structure in dianhydride and sulfonyl group in diamine proves to exhibit discharged energy density and charge-discharge efficiency of 6.34 J/cm(3) and 92.3% at 500 MV/m, respectively. In addition, CPI-5 also displays stable dielectric properties in temperature range of -50 - 200 degrees C. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47883.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available