Fully aromatic, siloxane‐modified polybenzimidazoles and polybenzoxazoles were prepared by a single‐stage melt polymerization and characterized. These polymers, which have good solubility in pyridine and N‐methylpyrrolidinone, undergo thermooxidative decomposition above 300°C. Model compounds for these two classes as well as polypyromellitimides were also prepared.
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Breed et al. (1976) studied this question.
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