Abstract
An analysis is made of stress relaxation results on a series of poly(ethylene tetrasulfide) samples crosslinked with 1,2,3-trichloropropane. At low concentrations at least two processes of stress decay can be observed for which the respective rate constants and apparent activation energies are calculated. As the amount of trichloropropane is increased one process dominates with an activation energy of 26.6 ± 0.5 kcal. mole −1 arising from scission of the sulfur-sulfur bonds. The difference between this energy and the energy of bond scission, 33 kcal.mole −1, in the S 8 molecule is discussed.
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