Atom Transfer Rearrangement Radical Polymerization of Diamminebis( 2,4,6-trihalophenolato)copper(II) Complexes in the Solid State

Abstract

The synthesis of the poly(dichloro-or dibromophenylene oxide)s was achieved by the thermal decomposition of diammine-bis(2,4,6-trihalophenolato)copper(II) complexes in the solid state by atom transfer rearrangement radical polymerization. The thermal decomposition was performed either at different temperature ranges, 110 -250 • C, for 3 h, or at the maximum conversion temperature for different time intervals, 3 -48 h. Maximum yields of polymers were obtained at 190 • C and 3 h. The polymers were characterized by FTIR, 1 H and 13 C NMR spectroscopy, SEM, TGA and molecular weight determination by viscometrical methods. All the polymers were rigid, having high T g values between 178 and 189 • C. Only small amounts of Cu were detected by AAS.

Microrecycling of the metal–polymer-laminated packaging materials via thermal disengagement technology

“…The residual peaks from the absorption band at ~ 3044 cm −1 instigated by C-H stretching vibration with the medium appearance in the alkene compound class can be assigned to CH, CH 2 , and CH 3 groups with the sp 2 and sp 3 configurations where below 3000 cm −1 wave numbers, the smaller peaks correspond to the stretching (asymmetrical) in CH 2 with the sp 3 aliphatic configuration [58]. The absorption band at ~ 1605 cm −1 can be ascribed to the medium cyclic aromatic hydrocarbon group (alkene) with the ring vibration of carbon linear bonds (C=C) [58,59]. The intensity of this peak reduces with the time of thermal disengagement and the surrounding temperatures which signifies that the complete disintegration of polymeric bonds makes the separation of residues from the aluminum surface easier at higher treatment temperatures for a longer time.…”