Synthesis of Poly(styrene-acrylates-acrylic acid) Microspheres and Their Chemical Composition towards Colloidal Crystal Films

Table 3

Reflection peak position of photonic crystals films, particle diameter predicted by Bragg’s law, and DLS measurements.

Sample ID	Comonomer	Molar ratio; Sty : comonomer : AA	Reflection peak; (nm)	Particle diameter by Bragg’s law (nm)	(nm)
Rx-42	IOA	73 : 23 : 4	512	220	255
Rx-29	EHA	67 : 21 : 13	528	226	250
Rx-69	HA	65 : 30 : 5	554	238	252
Rx-56	HA	74 : 21 : 5	565	241	260
Rx-61	BA	68 : 18 : 14	555	220	255

Molar ratio of comonomers in the microsphere by ¹H-NMR.
Determined by reflectance spectrometer.
Determined using Bragg’s equation [15].
Determined by DLS.