Abstract

In this study, we investigated the optical properties of CCA films prepared with poly[styrene-co-sodium 1-allyloxy-2-hydroxypropane sulphonate] particles via soap-free emulsion polymerisation. Experiments were performed by adjusting the several reaction factors such as styrene concentration, sodium 1-allyloxy-2-hydroxypropane sulphonate concentration, polymerisation temperature, initiator and divinylbenzene concentration. All latexes showed uniform spherical particles and they showed a size range of 160–550 nm. All CCA films prepared with self-assembled array showed the respective shiny structural colours from their photonic crystals. It is found that the changes in such polymerisation factors greatly affect the number of particles and particle diameter and refractive indices. Refractive indices and the reflectivity increased with sodium 1-allyloxy-2-hydroxypropane sulphonate concentration, on the other hand, and decreased with divinylbenzene concentration.

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