Abstract
The temperature dependence of the rate of solid-state polymerization of trithiane was investigated in conjunction with calorimetric measurements of the heat capacity of the irradiated monomer as a function of temperature. It was found that the rate of change of entropy with temperature exhibited a maximum at about 175° C. The curve of per cent polymerization versus isochronal, post-irradiation polymerization temperature also peaked at some 175° C. Finally, the existence of a crystalline phase-transition in the monomer at about 194° C was discovered by DSC and was confirmed by X-ray powder diffraction and by optical microscopy. Two models which may interrelate this set of phenomena are suggested.
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This work was supported by a grant from the National Science Foundation.
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Nadkarni, V.M., Schultz, J.M. A study of the solid-state polymerization of trithiane. J Mater Sci 8, 525–538 (1973). https://doi.org/10.1007/BF00550457
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DOI: https://doi.org/10.1007/BF00550457