Polymer complexes. III. Stability and degradation of acrylonitrile‐transition metal bromide polymer complexes

Abstract

Thermal stabilities and degradation behaviour of PAN homopolymer and AN-CuBr, AN-CuBr,, AN-CoBr,, AN-NiBr, and AN-CdBr, polymer complexes were investigated. The stability of the polymer complexes is less than that of PAN. The main degradation products of the polymer complexes are ammonia and hydrogen cyanide, besides some monomer and methane. The activation energies for the degradation of PAN and the AN-CuBr, AN-CuBr, and AN-CoBr, polymer complexes are higher than those of the AN-NiBr, and AN-CdBr, polymer complexes. Polymerkomplexe. I I I . Stabilitat und Abbau yon Acrylnitril-~bergangsmetallbromid-Polymerkom~lexenDie thermische Stabilitat und das Abbauverhalten von PAN sowie von AN-CuBr, AN-CuBr,-, AN-CoBr,-, AN-NiBr,und AN-CdBr,-Polymerkomplexen wurde untersucht. Die Stabilitat dcr Polymerkomplexe ist geringer als die des PA4N. Die hauptsachlichen Abbauprodukte der Polymerkomplexe sind Ammoniak und Cyanwasserstoff neben etwas Monomer und Methan. Die Aktivierungsenergien fur den Abbau des PAN und der AN-CuBr-, AN-CuBr,-und AN-CoBr,-Polymerkomplexe liegen hoher als die der AN-NiBr,-und AN-CdBr,-Polymcrkomplexe. Uofiufiepfibz rcofinMRCbI. 111. Cma6.~nanocmb u aecmpyrcyun no&ufiepnbix rcofinfieiccoe arcpunonumpuna u 6poncuaoa nepexoamx fiemmioe AN-CuBr,, AN-CoBr,, AN-NiBr, II AN-CdBr,. CTa612JIbHOCTb n o n l z M e p H b I x K o M n n e K c O B M e H b m e 9 e M ~nrr n A H . OCHOB-I'fCCJIeHOBaJIHCb TepMIIqeCKafl CTa6IIJIbHOCTb 12 AeCTPYKqtlR n A H , a T a K m e IIOJIllMepHbIX KOMIIJIeKCOB TIIIIa AN-CuBr,

Electrical conductivity of heat treated polyacrylonitrile and its copper halide complexes

“…12 Figure 2 represents the IR spectrum of AN-CuX 2 polymer complexes which show the disappearance of the cyano group and two bands appearing at 3430 and 3530 cm Ϫ1 due to -HN 2 and -OH groups, respectively. These results are similar to those suggested by Diab et al 13 in the polymerization of AN in the presence of CuCl 2 . From the IR and elemental analysis data, the mode of complexation of polymer complexes of AN with copper halides can be shown (structure I).…”

Supramolecular Structure, Mode of Coordination, Thermal and Potentiometric Studies of Polymer Complexes: A Review

“…Poly(8-quinolyl acrylate)(HL 13 ) and the polymer complexes (153-156) of 8-quinolyl acrylate (L 13 ) with some transition metal bromides and uranyl acetate have been prepared and characterized by El-Sonbati and Diab [38] . Dioxouranium(IV) acetate dehydrate reacts with L 13 monomer in a 1:3 metal: ligand molar ratio.…”

“…The 1 H-NMR spectrum of monomers (L 1 -L 13 ) [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] showed the expected peaks and pattern of the vinyl group (CH 2 ¼CH), 6.25 ppm (dd, J ¼ 17, 11 Hz) for the vinyl CH proton and proton d 5.12 ppm (AM part of AMX system dd, J ¼ 17, 1 Hz) for the vinyl CH 2 protons, respectively. These peaks disappeared on polymerization while a triplet at d 1.86 ppm (t, J ¼ 7 Hz) and a doublet at 1.80 ppm (d, J ¼ 7 Hz) appeared, indicating that the polymerization of monomers occurs on the vinyl group [43,44] .…”

“…The most important peaks of proton magnetic resonance ( 1 H-NMR) of the ligands (L 1-13 ) and their complexes has been recorded in DMSO-d 6 using TMS as the internal standard [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] and tabulated in Table 1.…”

Polymer complexes. XVI

“…Thermal stabilities of the polymer complexes were compared with poly(5-vinylsalicylidene) aniline homopolymer, and the order of stabilities of the complexes was given. The activation energies of the polymer complexes were calculated.Polymer complexes have been given a great deal of attention in the last few years [1-3]; their structures and thermal stability have been of particular interest [4][5][6]. Recently, we dealt with polymer complexes derived from 5-vinyl salicylaldehyde and 5-vinyl salieylidene anthranilie acid with some transition metal salts [7,8].…”