The noncrystalline structure is achieved by relatively rapid cooling below what is referred to as the glass transition temperature, around 1, 000 degrees Fahrenheit for the soda-lime variety.

The results shows that epoxy resins containing rigid rod structure or many epoxy groups have a high glass transition temperature (Tg) because of high cross-linking density.

With decreasing grain sizes, its crystal structure, ferroelectricity and phase transition temperature all indicated the character of size effect.