Author/Authors :
Suresh، نويسنده , , S. and Gulotty Jr، نويسنده , , Robert J. and Bales، نويسنده , , Stephen E. and Inbasekaran، نويسنده , , Mike N. and Chartier، نويسنده , , Mark A. and Cummins، نويسنده , , Clark and Smith Jr، نويسنده , , Dennis W.، نويسنده ,
Abstract :
Ullmann coupling of benzyl ether protected 4-iodophenol with 4-nitrophenylazo aniline followed by deprotection in trifluoroacetic acid affords novel 4′-(4-nitrophenylazo)-N,N-bis(4-hydroxyphenyl)aniline. Co-condensation of this azo bisphenol and 9,9′-bis(4-hydroxyphenyl)fluorene (BHPF) with phosgene gave high molecular weight polycarbonate with Tg=239 °C and high thermal stability. The polymer was soluble in common organic solvents and high quality films were prepared and subjected to poling and electro-optic (EO) analysis. The copolymer exhibited a r33 value of 3.7 pm/V. Synthesis, characterization, and thermal properties are described.
