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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.

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Author:Maria Bruma, Burkhard SchulzORCiDGND, Thomas Köpnick, Burkhard Stiller, Nataliya Belomoina, Frank W. Mercer
Document Type:Article
Year of first Publication:1999
Year of Completion: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