Cellular phone housing was ground to make original particulates using knife mill. Foams and adhesives with the lighter density than water were removed using sink-float process in water, and residual metals and wires were separated from desired materials composed of 7 thermoplastics using the sink-float process in salt. Improved impact strength and high tensile strength of the polymer mixture were achieved by adding glycidyl methacrylate by reactive process. Aniline-based azopolymers were synthesized with N,N-diglycidyl aniline and aniline reacted with amino benzonitrile or nitroaniline by azo coupling reactions. The precursors of epoxy-based azopolymers synthesized with diglycidyl ether of bisphenol A and aniline or 3-hydroxyl aniline were coupled with hydroxyl nitroaminobenzene. Polyurethane-based azopolymers synthesized by the reaction of toluene-2,4-diisocyanate with disperse orange 17 showed better diffractive efficiency than the epoxy- or aniline-based azopolymers with nitro group substituents.

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