Properties of Solutions of Poly-(p-phenylenebenzobisthiazole) in Polyphosphoric Acids of Different Composition

The possibility of hydrolytic degradation of an oligomeric solvent--polyphosphoric acid--in finished spinning solution was established. The viscosity of the polymer solution can be decreased by decreasing the proportion of phosphoric anhydride in the solvent with a small change in the concentration...

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Bibliographic Details
Published in:Fibre chemistry 2000-09, Vol.32 (5), p.330-333
Main Authors: Platonov, V A, Odnoralova, V N, Kiya-oglu, V N, Gashinskaya, N A, Budnitskii, G A
Format: Article
Language:English
Subjects:
Anhydrides
Concentration (composition)
Conversion
Crystallization
Crystals
Fibre
Micrometers
Polymers
Solvents
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Summary:The possibility of hydrolytic degradation of an oligomeric solvent--polyphosphoric acid--in finished spinning solution was established. The viscosity of the polymer solution can be decreased by decreasing the proportion of phosphoric anhydride in the solvent with a small change in the concentration of polymer in the solution; the properties of the fibre fabricated from such a solution do not worsen. When the degree of polymerization of the polyphosphoric acid decreases (up to its conversion to orthophosphoric acid), poly-(p-phenylenebenzobisthiazole) crystal solvates are crystallized into single crystals hundreds of micrometers in size.[PUBLICATION ABSTRACT]
ISSN:0015-0541
1573-8493
DOI:10.1023/A:1004151523617