Synthesis and study of aromatic polyamides containing silicon and phenylquinoxaline rings in the main chain
- New poly(phenylquinoxaline-amide)s with silicon in the main chain have been prepared by polycondensation reaction of a diacid chloride, namely bis(p-chlorocarbonyl-phenyl)-diphenylsilane, with aromatic diamines containing one or two phenylquinoxaline rings separated by a flexible bridge such as ether or methylene. These polymers were easily soluble in polar aprotic solvents such as N-methylpyrrolidinone (NMP) and dimethylformamide (DMF) and showed high thermal stability with decomposition temperature being above 450°C and glass transition temperature in the range of 260- 304°C. Polymer solutions in NMP were processed into thin flexible films which exhibited very smooth surfaces, free of pinholes when studied by atomic force microscopy. The free-standing films showed a dielectric constant in the range of 3.6-3.7.
| Author details: | Maria Bruma, Burkhard SchulzORCiDGND, Thomas Köpnick, Burkhard Stiller, Nataliya Belomoina, Frank W. Mercer |
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| Publication type: | Article |
| Language: | English |
| Year of first publication: | 1999 |
| Publication year: | 1999 |
| Release date: | 2017/03/24 |
| Source: | European polymer journal. - 35 (1999), S. 1253 - 1260 |
| Organizational units: | Zentrale und wissenschaftliche Einrichtungen / Interdisziplinäres Zentrum für Dünne Organische und Biochemische Schichten |
