NMR investigation of Fischer-Tropsch waxes. II. Hard wax

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Abstract
For pt.I see J.A.J. Lourens and E.C. Reynhardt, ibid., vol.12, p.1963 (1970). The proton spin-lattice relaxation time and the liquid content of polycrystalline hard wax, average chain length m=50 carbon atoms and chain length disorder Delta m=15.7, were determined as a function of temperature (385>T>118K). In the low-temperature phase (T308K) is dominated by the gradual melting of the crystalline phase of the wax. Linear relationships exist between the percentage liquid in the wax and the specific volume and thermal conductivity of the wax. The thermogram of the wax is discussed in terms of the melting process of the wax and the effect of this process on the average chain length and chain length disorder.