Specific heat capacities of a homogeneous ethylene-1-butene copolymer were measured by adiabatic calorimetry in the temperature range from 7 to 406 K (stepwise heating after cooling at rates in the range from 6 to 25 K h-1, averaged heating rates 5 - 34 K h-1). The glass transition is centred around 224 K. With devitrification also melting sets in. The crystallinity of the polymer was calculated (within the two-phase model) as a function of temperature

Specific heat capacities of a homogeneous ethylene-1-octene copolymer were measured by adiabatic calorimetry in the temperature range from 5 to 400 K (stepwise heating at averaged rates of approximately 1 to 34 K h-1, after cooling at rates in the range from 8 to 4 K min-1. The glass transition takes place from roughly 205 to 225 K and is centred around approximately 215 K. At the latter temperature, also the temperature drifts during the stabilisation

The heat capacities of a very low-density polyethylene copolymer (VLDPE) was measured between 10 and 410 K. The glass transition takes place from roughly 205 to 225 K and is centred around approximately 215 K. Using two sets of literature data for the fully crystalline and the fully amorphous states, crystallinities were calculated as a function of temperature. During the stabilisation periods in the melting process no equilibrium is reached, because