meisamkh

Hello All I have a question about the cold touch of the glass versus the warm touch of the plastic. As we know it is not because of the heat conductivity as glass has very low heat conductivity. It is speculated that the difference is because of heat capacity of glass. Glass has higher heat capacity than PC and acrylic and so it has the colder touch, but how about when you compare it with a plastic such as PP. base on the literature, PP has higher heat capacity than glass but it does not hace a cold touch. so, what are the main reason for the cold touch of glass? if we want to have a plastic to have the same cold touch, what parameters or properties of the plastic should change?