👉 The term "nonthermoplastic" refers to a material that is not thermally stable, meaning it has no tendency to change its state of matter under heat or pressure. Nonthermoplastic materials are typically found in nature as solid forms, such as sand and gravel, but they can also be formed by chemical reactions with certain substances. Nonthermoplastic materials often have a low melting point (less than 10°C) and a high freezing point (more than -
