Polyformals, aromatic based

These preliminary results suggest that aromatic polyformals such as 6 may have better oxidative and chemical stability than would have been predicted based on the reactivity of aliphatic formals. However, the effect of long term aging (either to oxidative or chemical environments) on the properties of have not been determined. 

Preliminary information on new aromatic polyformals based on other bisphenols is contained in Table 7. Most of these materials have been made only once and no extensive characterization of the polymers has been made. None of these polyformals were examined for cyclic oligomers. Where possible, the T for the corresponding polycarbonate is also given. All polymerizations were run in NMP/ CH9CI9 mixtures except when the bisphenol contained an electron 0... 

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