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Novel, organosoluble, light‐colored fluorinated polyimides based on 2,2′‐bis(4‐amino‐2‐trifluoromethylphenoxy)biphenyl or 2,2′‐bis(4‐amino‐2‐trifluoromethylphenoxy)‐1,1′‐binaphthyl
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yang, Chin-Ping Hsiao, Sheng-Huei Tsai, Che-Yu Liou, Guey-Sheng |
| Copyright Year | 2004 |
| Abstract | Two series of fluorinated polyimides were prepared from 2,2-bis(4-amino- 2-trifluoromethylphenoxy)biphenyl (2) and 2,2-bis(4-amino-2-trifluoromethylphe- noxy)-1,1-binaphthyl (4) with various aromatic dianhydrides via a conventional, two- step procedure that included a ring-opening polyaddition to give poly(amic acid)s, followed by chemical or thermal cyclodehydration. The inherent viscosities of the polyimides ranged from 0.54 to 0.73 and 0.19 to 0.36 dL/g, respectively. All the fluori- nated polyimides were soluble in many polar organic solvents, such as N,N-dimethyl- acetamide and N-methylpyrrolidone, and afforded transparent and light-colored films via solution-casting. These polyimides showed glass-transition temperatures in the ranges of 222-280 and 257-351 °C by DSC, softening temperatures in the range of 264 -301 °C by thermomechanical analysis, and a decomposition temperature for 10% weight loss above 520 °C both in nitrogen and air atmospheres. The polyimides had low moisture absorptions of 0.23- 0.58%, low dielectric constants of 2.84 -3.61 at 10 kHz, and an ultraviolet-visible absorption cutoff wavelength at 351- 434 nm. Copolyimides derived from the same dianhydrides with an equimolar mixture of 4,4-oxydianiline and diamine 2 or 4 were also prepared and characterized. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 2416 -2431, 2004 |
| Starting Page | 2416 |
| Ending Page | 2431 |
| Page Count | 16 |
| File Format | PDF HTM / HTML |
| DOI | 10.1002/pola.20116 |
| Alternate Webpage(s) | http://homepage.ntu.edu.tw/~gsliou/FPML/Paper/2004/JPS(041).pdf |
| Alternate Webpage(s) | https://doi.org/10.1002/pola.20116 |
| Volume Number | 42 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
