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The observation is made that polymeric sulfur above the glass transition temperature is subject to two relaxation mechanisms, a "simple" molecular flow and bond interchange. The effects of these mechanisms on the viscoelastic properties are separated quantitatively, and their relative contributions to the shear viscosity are computed. The activation energies of each of the mechanisms are also determined, and it is shown that the molecular flow is subject to a WLF type temperature dependence, while that of the interchange mechanism is of the Arrhenius type. It is tentatively suggested that the chemical relaxation mechanism is of a radical nature, with homolytic chain scission predominating.

87phorus(II1) cyanide burn if heated in dry air. The compound is slightly soluble in chloroform, carbon disulfide, phosphorus(II1) chloride, and ether.

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