Mod-01 Lec-35 Amorphous and Crystalline State : Tg and Tm

[@joeclipsss]

excellent lecture, I love it, how to lower Tg in polyurethane foam, we use polyols with EW and hydroxyls, PO and EO, we use around 4000 molecular weight, can I move down the Tg by lowering the Ew?

[@BC-yr6eg]

👍👍👍👍👍👍👍

[@yarkapwelly7034]

Sir,Can you like please tell me why glass transition temperature of polyvinyl alcohol is greater than polyethylene?

[@MuhammadSaad-xp7gp]

due to the presence of bulky grp that is OH which hiders the mobility and hence increases the tg

[@zindagichemistry]

Not clear visible of writting words