Estimating the glass transition temperature for polymers in `confined geometries`
(PHYSorg.com Physics)

Polymers are used for myriad applications today, and perhaps the most important property that dictates which polymer is chosen for a given application is its `glass transition temperature.` Many industrial polymers possess an irregular molecular structure that makes it impossible for them to crystallize. As a polymer material cools from a high temperature above its glass transition temperature, it morphs from a liquid to a glass when the transition temperature is reached.