Synthesis of Aromatic Polybenzoxazoles in Trimethylsilyl Polyphosphate (PPSE)
Final technical rept. May 1987-Dec 1988
WRIGHT RESEARCH AND DEVELOPMENT CENTER WRIGHT-PATTERSON AFB OH
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A series of five 6F-polybenzoxazoles were synthesized by the trimethylsilyl-polyphosphate PPSE condensation of various aromatic dicarboxyllic acids with 4,4-hexafluoroisopropylidene bis2-aminophenol. Glass transition temperatures Tg were measured by differential scanning calorimetry DSC. Thermogravimetric analysis and isothermal aging results are also reported for the polybenzoxazoles.
- Organic Chemistry