There is a formula to calculate the RI in different temperatures, and it works on the glass, but there is a difference on the plastic performance, it is not behaved as predicted.
The RI of plastic glass was not predicted as normal glass according to thermal shift of a lens
Is there any new formula about the plastic glass?
It is important to add information to your inquiry, which type of plastic you need to predict the temperature? What do you mean with glass temperature? Do mean the glass material or you mean glass state in plastic?
The temperature at the border from the rubbery state to the solid state (called the glass state) is called its "glass transition temperature". The glass transition temperature is generally indicated as Tg.
Tg is a physical quantity that is determined by the type of plastic. By knowing the value of Tg, it is possible to estimate the time required for the molded item to cool inside the cavity and the molded item temperature at which it can be ejected from the mold.
You can find the values of glass transition temperature Tg in below link for the major plastics
http://www.misumi-techcentral.com/tt/en/mold/2011/12/106-glass-transition-temperature-tg-of-plastics.html
I hope this answer help you.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Inorganic Materials
- Ceramics
- Glass