A Simple Optical Model for the Swelling Evaluation in Polymer Nanocomposites

Table 1

Refractive indices and extinction coefficients of the used materials; 〈 n〉 is the weighted mean value for polymer nanocomposite.

Material	n	k	Weight (%)	Thickness (nm)	⟨𝑛⟩
SiO2	1.45	∼0		600
PHEMA	1.51	∼0	98.5%	266
CB	2	1	1.5%
C2H5OH	1.33	∼0	0.37%
PHEMA/CB				866	1.520
PHEMA/CB/C2H5OH				866	1.524
SIO2/PHEMA/CB/				866	1.488