Optical Study on Poly(methyl methacrylate)/Poly(vinyl acetate) Blends

Table 1

The energy gap 𝐸_𝑔 (eV) for different concentrations of (PMMA/PVAc) blend after exposure to UV and filtered radiation at different exposure times.

PMMA/PVAc	Exposure radiation	Exposure time (hour)					Percentage of decrease of 𝐸𝑔% (eV)
		0	4	12	20	24
(100/0)	filter	4.60	4.57	4.56	4.52	4.48	2.61
	UV	4.60	4.50	4.41	4.32	4.23	8.04
(75/25)	filter	4.67	4.66	4.64	4.60	4.59	1.71
	UV	4.67	4.54	4.47	4.36	4.30	7.92
(50/50)	filter	4.85	4.84	4.83	4.80	4.77	1.65
	UV	4.85	4.68	4.57	4.56	4.53	6.29
(25/75)	filter	4.92	4.92	4.89	4.88	4.88	0.81
	UV	4.92	4.83	4.77	4.73	4.70	4.47
(0/100)	filter	5.28	5.28	5.27	5.24	5.24	0.76
	UV	5.28	4.25	5.19	5.11	5.07	3.98