Recycling Process for Cellular Phones and Surface Relief Grating

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.

Autorentext
Woo-Hyuk Jung, DEng: Reactive processing and surface relief grating at University of Massachuestts Lowell, MS: Polymer at University of Florida, ME, BE: Polymer at Pusan National University, Busan, Korea, Principal Researcher at Thermolon Korea Co., Busan, Korea

Klappentext
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.