TY  - JOUR
A1  - Bruma, Maria
A1  - Hamciuc, Corneliu
A1  - Hamciuc, Elena
A1  - Mercer, Frank W.
A1  - Belomoina, Nataliya
A1  - Schulz, Burkhard
T1  - Heterocyclic polyamides containing hexafluoroisopropylidene groups
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Bruma, Maria
A1  - Hamciuc, Corneliu
A1  - Hamciuc, Elena
A1  - Mercer, Frank W.
A1  - Belomoina, Nataliya
A1  - Schulz, Burkhard
T1  - Heterocyclic polyamides containing hexafluoroisopropylidene groups
N2  - New heterocyclic polyamides have been synthesized by solution polycondensation of aromatic diamines containing phenyl- quinoxaline units with diacid chlorides having both imide and hexafluoroisopropylidene (6F) groups. These polymers are soluble in polar aprotic solvents, such as N-methylpyrrolidone (NMP) or N,N-dimethylformamide (DMF), and can be cast into flexible thin films from solutions. They show high thermooxidative stability with decomposition temperatures above 400°C and glass transition temperatures in the range of 225 - 300°C. The polymer films exhibit good chemical resistance towards deluted acids and good electrical insulating properties with dielectric constants in the range of 3.2 - 3.7.
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Bruma, Maria
A1  - Hamciuc, Corneliu
A1  - Sava, Ion
A1  - Hamciuc, Elena
A1  - Mercer, Frank W.
A1  - Fritzsche, P.
A1  - Schulz, Burkhard
T1  - High temperature polyamides containing pendant imide groups
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Hamciuc, Corneliu
A1  - Schulz, Burkhard
A1  - Bruma, Maria
T1  - New polyhydrazides and polyoxadiazoles containing pendent phenoxy groups
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Hamciuc, Elena
A1  - Hamciuc, Corneliu
A1  - Bruma, Maria
A1  - Stoleriu, Andre
A1  - Schulz, Burkhard
T1  - Poly(hydrazide-ester)s and poly(1,3,4-oxadiazole-ester)s containing pendent phenoxy groups
N2  - A series of new arornatic poly(hydrazide-ester)s has been synthesized by solution polycondensation of two diacid dichlorides containing preformed ester groups with phenoxyterephthaloyl dihydrazide or with a mixture of phenoxyterephthaloyl dihydrazide with terephthaloyl- or isophthaloyl dihydrazide in N-methyl-2-pyrrolidinone. The thermal cyclization of the poly(hydrazide-ester)s gave the corresponding poly(1,3,4-oxadiazole-ester)s containing pendent phenoxy groups. The polymers were characterized by viscometry, solubility measurements, IR spectroscopy, differential scanning calorimetry and thermogravimetric analysis.
Y1  - 1997
ER  -