New measurements of the thermal conductivity of solid ethyl alcohol C 2 H 5 OH in the interval from 2 K to the melting temperature are presented. An annealing effect in the thermal conductivity of the orientationally ordered phase of the alcohol has been observed over a wide range of temperatures. This phase was obtained as a result of an irreversible first-order phase transition from an orientationally disordered crystal with a cubic structure at T = 109 K. The thermal conductivity was observed to increase as the monoclinic lattice changed from a less stable phase to a more stable one. The growth may be due to the improved quality of the completely ordered crystal. A comparative analysis of the temperature dependences of the thermal conductivity κ( T ) is made for the solid monohydroxyl alcohols CH 3 OH, C 2 H 5 OH, С 2 D 5 OD, C 3 H 7 OH, and C 4 H 9 OH in their disordered orientational and structural states. At low temperatures the thermal conductivity of the series of monohydroxyl structural glasses of the alcohols increases linearly with the mass of the alcohol molecule.
/lp/american-institute-of-physics/thermal-conductivity-of-solid-monohydroxyl-alcohols-in-polyamorphous-zm2vLi8gsZ