## Abstract Two novel fluorine‐containing aromatic polybenzimidazoles were synthesized by direct polycondensation of 4,4′‐(hexafluoroisopropylidene)dibenzoic acid with 3,3′‐diaminobenzidine tetrahydrochloride and 1,2,4,5‐benzenetetramine tetrahydrochloride. The effect of introduction of fluorine on
Condensation polymers containing fluorine. II. Physical characterization of linear polyesters from hexafluoropentanediol
✍ Scribed by E. V. Gouinlock Jr.; C. J. Verbanic; G. C. Schweiker
- Publisher
- John Wiley and Sons
- Year
- 1959
- Tongue
- English
- Weight
- 735 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0021-8995
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Two fluorine-containing aromatic polybenzothiazoles were synthesized by direct polycondensation of 4,4 -(hexafluoroisopropylidene)dibenzoic acid and tetrafluoroterephthalic acid with 2,5-diamino-1,4-benzenedithiol dihydrochloride using phosphorus pentoxide/methanesulfonic acid or polyphosphoric acid
A series of fluorine-containing aromatic homopolyacetals and copolyacetals with a wide range of unit ratios were synthesized by the solution polycondensation of 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane (bisphenol AF), 2,2-bis(4-hydroxyphenyl)propane (bisphenol A), or both with 2-(trifl