The miscibility in binary blends of a ferroelectric (vinylidene fluoride-trifluorethylene) copolymer (PVDF-TrFE) and amorphous poly(methyl-methacrylate) (PMMA) has been investigated over the full range of compositions for the copolymer with 50% wt. of trifluorethylene (TrFE). The kinetics of glassy and ferroelectric phase transitions have been studied and we demonstrate the miscibility of the components in the range of 5% to 15% wt. of PMMA. From 20 to 35 wt% of PMMA, the system can still crystallize and present ferroelectricity, but it becomes strongly thermal history dependent. Above 40% wt., it is completely amorphous. The relationship between optical scattering in the visible range and a room temperature crystallization process has been established. The 15% wt. PMMA sample has been suggested as a very promising host material for non-linear optical and thermoluminescence applications.