Isochoric thermal conductivity of crystalline 1,1-difluoroethane (F-152a freon) is measured on samples of different densities in the dynamically orientationally disordered (DOD) phase. The thermal conductivity increased with temperature, similar to how it occurs in amorphous and glass-like substances above the plateau area. It is found that this behavior can be described by a thermo-activation mechanism with constant activation energy and density-dependent pre-exponential factor. Bridgman coefficient g = − (∂lnκ/∂lnV)_T is 6.0 ± 0.5. It is shown that the thermal conductivity of a number of other molecular crystals with the dynamic orientational disorder can be described in a similar way. Possible reasons for the thermal activation behavior of thermal conductivity are discussed.

在动态取向无序（DOD）相中以不同密度的样品测量了结晶的1,1-二氟乙烷（F-152a氟利昂）的等时热导率。导热系数随温度升高而增加，类似于在高原区域上方的无定形和玻璃状物质中的导热系数。发现该行为可以通过具有恒定的活化能和依赖于密度的预指数因子的热活化机制来描述。布里奇曼系数g = −（∂lnκ/∂lnV）_T为6.0±0.5。结果表明，可以以类似的方式描述具有动态取向紊乱的许多其他分子晶体的热导率。讨论了热导率的热活化行为的可能原因。