The thermal properties of polymeric materials are important to the function of components and assemblies that will operate in cold or warm environments. Glass Transition Temperature (referred herein as Tg) is the point at which a material goes from a hard brittle state to a soft rubbery state. Amorphous polymers only exhibit a Tg. Crystalline polymers exhibit a Tm (melt temperature) and typically a Tg since there is usually an amorphous portion as well (“semi”-crystalline). Identifying the Tg of polymers is of interest for various reasons, and is often used for quality control and research and development.