Thermal properties of an ethylene/1-butene block copolymer

A precision, adiabatic vacuum calorimeter and a differential scanning calorimeter have been used to measure the heat capacity of an ethylene/1-butene block copolymer over the temperature range 80–450°K. An estimate has been made of heat capacity values below 80°K. Values of the heat capacity, entropy, enthalpy, and free energy are listed at 10°K intervals. A glass transition (200°K), a transition of unknown origin (335°K) and a melting transition (400°K) were observed.