I am searching for publications and measurement data addressing the specific heat capacity of polymers used as cable insulation in the car industry like PVC, PE and PP. Of particular interest is the temperature range between 20 °C to 120 °C. The attached paper presents, in Figure 5, exactly what I am looking for, but unfortunately, it is limited to PVC. Now, I am seeking additional studies that also investigate PE and PP, preferably including simulations of the specific heat capacity of these materials with increasing temperature. Additionally, databases listing values in this temperature range would be valuable. So far, I have only found constant values for heat capacity, which are insufficient for an accurate representation of material behavior.