Table 1.

Thickness, optical and mechanical properties of monolayer and multilayer films.

Film samples	Thickness (µm)	%T at 600 nm	L	A	b	ΔE	WI	YI	Fm (N)	TS (MPa)	EAB (%)	YM (MPa)
PNE	66 ± 1d	5.65 ± 0.24 e	85.78 ± 0.26d	−4.15 ± 0.21d	33.37 ± 1.9a	35.80 ± 1.92a	−1236 ± 135c	55.58 ± 3.34a	6.27 ± 0.12c	6.56 ± 0.03b	8.12 ± 0.51c	95.24 ± 12.20c
EC1	30 ± 2e	69.97 ± 3.64 a	90.75 ± 0.05a	0.99 ± 0.04 a	−1.13 ± 0.04d	1.36 ± 0.04d	12.29 ± 1a	−1.77 ± 0.07d	4.12 ± 0.10 d	9.82 ± 0.24 a	5.39 ± 0.61 d	353.20 ± 9.49 a
EC2	68 ± 3c	60.82 ± 2.85b	89.63 ± 0.07b	1.02 ± 0.02a	−0.63 ± 0.02d	2.57 ± 0.06d	−8.85 ± 1a	−1 ± 0.03d	10.19 ± 0.61b	9.49 ± 0.61 a	8.04 ± 0.29c	276.29 ± 9.11b
M1	124 ± 2b	41.9 ± 1.89c	85.16 ± 0.19e	−0.57 ± 0.01b	16.31 ± 0.15b	19.16 ± 0.20b	−386.82 ± 10b	27.37 ± 0.31b	7.55 ± 0.32 c	4.19 ± 0.17c	15.51 ± 1.20b	86.48 ± 14.58 d
M2	198 ± 3a	31.24 ± 3.29 d	87 ± 0.15c	−0.98 ± 0.05c	13.56 ± 0.71c	16.01 ± 0.69c	−254.28 ± 21b	22.27 ± 1.18c	17.06 ± 1.40 a	6.03 ± 0.41b	18.04 ± 0.74 a	157.25 ± 2.65c

The data represent the mean ± one standard deviation (n = 3). Means with the same letters are not significantly different P ≤ 0.05).