Preparation of phosphorus-containing polymers—XVI. Synthesis of phosphorus-containing polyanhydride-imides |
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Authors: | M. Sato M. Yokoyama |
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Affiliation: | Department of Industrial Chemistry, Kogakuin University, Nishishinjuku, Shinjuku-ku, Tokyo 160, Japan |
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Abstract: | Phosphorus-containing polyanhydride-imides were synthesized from N,N-bis(4-carboxyphthalimido)-3,3′-diphenylalkylphosphine oxide, 3,3′-[N,N′-bis(4-carboxyphthalimido)]benzophenone and their mixtures in two steps via the diacetyl derivatives of the bisimide-carboxylic acids. The resulting polymers have reduced viscosities of 0.06–0.14 dl/g and are soluble in polar aprotic solvents such as DMA, DMF and DMSO, and conc. H2SO4 etc. They have good hydrolytic stability for moisture and water. Phosphorus-containing polymers have little heat-resistance and poor flame-retardance. The benefit of incorporating phosphorus in the polymers is small. |
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