E. Hamciuc, C. Hamciuc, M. Brumǎ
Dec 1, 2005
Citations
0
Influential Citations
34
Citations
Journal
European Polymer Journal
Abstract
Abstract New poly(1,3,4-oxadiazole-imide)s containing dimethylsilane units have been prepared by solution polycondensation reaction of an aromatic dianhydride incorporating dimethylsilane group, namely bis(3,4-dicarboxyphenyl)dimethylsilane dianhydride, with different aromatic diamines having preformed 1,3,4-oxadiazole ring, such as 2,5-bis( p -aminophenyl)-1,3,4-oxadiazole, 2,5-bis[ p -(4-aminophenoxy)phenyl]-1,3,4-oxadiazole, 2,5-bis[ p -(3-aminophenoxy)phenyl]-1,3,4-oxadiazole, 2-(4-fluorophenyl)-5-(3,5-diaminophenyl)-1,3,4-oxadiazole, and 2-(4-dimethylaminophenyl)-5-(3,5-diaminophenyl)-1,3,4-oxadiazole. The polymers were easily soluble in polar organic solvents, such as N -methylpyrrolidinone, N , N -dimethylformamide, and pyridine, as well as in less polar organic solvents, such as tetrahydrofuran and chloroform. Very thin coatings deposited on silicon wafers exhibited smooth, pinhole-free surface in atomic force microscopy investigations. The polymers showed high thermal stability with decomposition temperature being above 415 °C. They exhibited a glass transition in the temperature range of 202–282 °C, with reasonable interval between glass transition and decomposition temperature. Solutions of the polymers in N , N -dimethylformamide exhibited fluorescence, having maximum emission wavelength in the range of 353–428 nm.