TY  - JOUR
A1  - Bruma, Maria
A1  - Schulz, Burkhard
A1  - Köpnick, Thomas
A1  - Stiller, Burkhard
A1  - Belomoina, Nataliya
A1  - Mercer, Frank W.
T1  - Synthesis and study of aromatic polyamides containing silicon and phenylquinoxaline rings in the main chain
N2  - 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.
Y1  - 1999
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/21341
ER  -