Why PMMA thin film prepared by dissolution of PMMA in Chloroform is not transparent (it is opaque)?

I want to make a thin film from PMMA in CHCl3 solution with a 200 mg/ml concentration. The PMMA dissolved well in CHCl3 and it was optically clear and transparent, but the thin film was opaque. I...

28 October 2022 1,659 3 View