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Based on several unsymmetrical,twist,noncoplanar phthalazinone-containing monomers 2a-2e and an active bis(4-fluorophenyl)phenyl phosphine oxide(BFPPO) monomer,a series of novel poly(phthalazinone ether phosphine oxide)s (PPEPO) was synthesized by anhydrous K_2CO_3 mediated N—C coupling reaction in DMAc.The polymers exhibited good thermal properties with T_gs ranging from 267℃to 306℃and 5%weight loss temperatures in nitrogen higher than 430℃, together with high char yield upon prolonged heating at 800℃(35%—56%).Moreover,the polymers were readily soluble in common organic solvents,such as N-methyl-2-pyrrolidone,chloroform and m-cresol.These polymers had inherent viscosities in the range of 0.45-0.72 dL/g and could be cast into flexible and colorless films by spin coating or casting approach.
Based on several unsymmetrical, twist, noncoplanar phthalazinone-containing monomers 2a-2e and an active bis (4-fluorophenyl) phenyl phosphine oxide (BFPPO) monomer, a series of novel poly (phthalazinone ether phosphine oxide) anhydrous K_2CO_3 mediated N-C coupling reaction in DMAc. These polymers exhibit good thermal properties with T_gs ranging from 267 ° C to 306 ° C and 5% weight loss temperatures in nitrogen higher than 430 ° C, together with high char yield on prolonged heating at 800 ° C (35% -56%). Moreover, the polymers were readily soluble in common organic solvents, such as N-methyl-2-pyrrolidone, chloroform and m-cresol.These polymers have inherent viscosities in the range of 0.45-0.72 dL / g and could be cast into flexible and colorless films by spin coating or casting approach.