THE SYNTHESIS AND MECHANISM OF THERMAL DEGRADATION OF SOME DIKETONE - DIAMINE POLYMERS.
STEVENS INST OF TECH HOBOKEN N J DEPT OF CHEMISTRY AND CHEMICAL ENGINEERING
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Three polymers were synthesized by the acid catalyzed polycondensation of m-dibenzoylbenzene with ethylenediamine, and by the polycondensation of p-dibenzoylbenzene with tetrafluoro-m-phenylenediamine and tetrafluoro-p-phenylenediamine. The thermal stability of these polymers was determined by thermogravimetric analysis in air and in an inert atmosphere. In addition, three isomeric polymers which were synthesized in a previous investigation by the polycondensation of m-dibenzoylbenzene with o- , m- , and p-phenylenediamine were subjected to combined thermogravimetric analysis TGA - vapor phase chromatography VPC -- mass spectral analysis MS. By means of this combined analysis, it was possible to thermally degrade a polymer sample, collect the condensable products given off upon thermal degradation, separate the products by vapor phase chromatography, and identify them by mass spectroscopy. Upon identification of the fragments given off, it was possible to characterize the mechanism or mechanisms of thermal degradation of these polymers. Author
- Organic Chemistry
- Polymer Chemistry