Polyformal, oligomers

The infrared spectrum showed weak phenolic -OH bands of 3540 and 3440 cm . Liquid chromatography indicated the material was a mixture of the linear BPA-polyformal oligomers with very minor... [Pg.96]

Fig, 2 Gradient elution liquid chromatogram of low MW oligomers in a BPA polyformal sample... [Pg.72]

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... [Pg.79]

High-Performance Polymers Aromatic Heterocyclic Monomers Thermally Stable Polymers High-Performance Composites Reactive Oligomers Aromatic Polyformals Star and Comb Shape Copolymers Polymers in Phase Transfer Catalysis Organometallic Polymers Poljmiers in Medical Applications Nitrogen-Containing Polymers Vinyl Organometallic Monomers Functionalized Polymers Anionic Copolymerizations Macromers... [Pg.502]

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