Thermoanalytical characterization of polyphenylacetylene |
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| Authors: | A. S. Luyt H. C. M. Vosloo |
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| Affiliation: | (1) Department of Chemistry, Potchefstroom University for Christian Higher Education, 2520 Potchefstroom, South Africa;(2) Department of Chemistry, University of the North (Qwaqwa Campus), Private Bag X13, 9866 Phutaditjhaba, South Africa |
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| Abstract: | Differential scanning calorimetry, thermogravimetry, thermogravimetry/mass spectrometry and infrared spectroscopy were used to study the thermal behaviour of high polyphenylacetylene obtained through the Mo(CO)6 catalyzed metathesis polymerization of phenylacetylene. The exothermic peaks observed in nitrogen are explained by crystallization or a solid state transition, initiation and decomposition to aromatic compounds, and the endothermic peaks by volatilization. In oxygen the exothermic peaks are explained by crystallization or a solid state transition, initiation, oxidation, cross-linking and decomposition. The TG and MS results indicate that the polymer is stable to ca. 250°C with solvent molecules trapped in the polymer matrix evolving below this temperature. |
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| Keywords: | metathesis polymerization molybdenum hexacarbonyl polyphenylacetylene thermal analysis |
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