Abstract
The temperature—viscosity curves were obtained for polyphosphoric acid with a phosphoric anhydride content of 72 to 90.75%. It was found that the composition of PPA remains constant for an industrially sufficient time. The molecular-weight distribution of PPA with a different phosphoric anhydride content was determined with the published data and a scheme of the mechanism of hydrolytic degradation of PPA was proposed.
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References
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Additional information
All-Russian Scientific-Research Institute of Polymer Fibres, Mytishchi. Translated fromKhimicheskie Volokna, No. 5, pp. 22–25, September–October, 2000
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Platonov, V.A. Properties of polyphosphoric acid. Fibre Chem 32, 325–329 (2000). https://doi.org/10.1007/BF02360636
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DOI: https://doi.org/10.1007/BF02360636