Answer in Organic Chemistry for Jaweria Rana #116020
April 20th, 2023
The glass transition temperature “T_g”
increases with molecular weight and asymptotically approaches a maximum value.
The glass transition temperature is the temperature range in which a polymer changes from a rigid “glassy” state to a more pliable “rubbery” state.
In , the Flory–Fox equation relates the number-average molecular mass “M_n”
of a polymer to its glass transition temperature “T_g”
“T_g=T_{g,infin}-frac{K}{M_n}”
where
- “T_{g,u221e}” is the maximum value of Tg
- that can be achieved at a theoretical infinite molecular mass
- “K” is an empirical parameter that is related to the free volume present in the polymer sample
