Salicylic acid‐biuret‐trioxane terpolymer resins and their ion‐exchange properties

Abstract

Terpolymer resins (SBT) were synthesized by the condensation of salicylic acid and biuret with trioxane in the presence of acid catalyst and using varied molar ratios of reacting monomers. Terpolymer resin compositions have been determined on the basis of their elemental analysis and the number average molecular weights of these resins were determined by conductometric titration in non-aqueous medium. The viscosity measurements carried out in DMF indicate normal behaviour. IR spectra were studied to elucidate the structure. TGA data were analysed to estimate the characteristic thermal parameters. The terpolymer resins have been further characterized by reflectance spectra in solid state, absorption spectra in non-aqueous medium, X-ray diffraction and electrical conductivity. Chelation ion-exchange properties have also been studied employing the batch equilibration method. ZUSAMMENFASSUNG:Durch siiurekatalysierte Kondensation von Salicylsaure mit Biuret und Trioxan wurden Terpolymere erhalten, deren Zusammensetzung durch Elementaranalyse bestimmt wurde. Die zahlenmittleren Molekulargewichte wurden durch konduktometrische Titration in einem nichtwahigen Medium ermittelt. Die Polymeren wurden mittels Viskosimetrie, IR-, UV-und Reflexionsspektroskopie, Thermogravimetrie und R6ntgenbeugung charakterisiert. Die elektrische Leitfahigkeit sowie Ionenaustauscher-Eigenschaften wurden ebenfalls untersucht .

Resin I: Synthesis, characterization, and ion‐exchange properties of terpolymer resins derived from 2,4‐dihydroxypropiophenone, biuret, and formaldehyde

“…The singlet signal appearing at 7.6 to 7.4 (d) ppm may be due imido proton of -CO-NH-CO-linkage. [24][25][26][27][29][30][31] Triplet signals appeared in the region 6.3 to 6.55 (d) ppm can be assigned to amino protons of -C-NH-CO-linkage. Intense signal appeared in the region 3.8 to 4.3 (d) ppm may be due to proton of methylenic bridges (CH 2 ) of polymer chain.…”

“…A medium singlet peak appeared at 2.8 to 2.95 ppm may be assigned to methyl protons of Ar-CO-CH 2 CH 3 group and 2.8 to 3.05 ppm is also of CH 2 in Ar-COCH 2 CH 3 except 2,4-DHPBF-I terpolymer all the remaining three polymer resins exhibit signals in the region 4.2 to 4.4 ppm which may be due to methylenic bridges of Ar-CH 2 -Ar linkage. [24][25][26][29][30][31] On the basis of the nature and reactive position of the monomer elemental analysis, electronic, IR, NMR spectra, and molecular weight, the most probable structures have been proposed for these terpolymer resins as shown in Figure 5.…”

Resins IV: Preparation and characterization of terpolymer resins prepared from biphenol, thiourea and formaldehyde

“…The calculation of (M n ) by this method is based on the following considerations 25 : (1) The first break corresponds to neutralization of the more acidic phenolic On the basis of degree of polymerization (D p ), the average number molecular weight (M n ) is calculated by multiplying the (D p ) by the formula weight of the repeating unit. 24 The results are incorporated in Table II. Viscometric measurements were carried out in DMF at 33 C. All resins showed normal behavior. The [g] was determined by the Huggin's equation (1) and Kraemer's equation (2).…”

“…[4][5][6][7][8][9][10] These terpolymers can be used as ion exchangers, 5,11 high temperature resistance material, [12][13][14][15] semiconductors, 16,17 antioxidants, 18 optical storage data, 19 moulding materials, 3,20 etc. From the literature data, it has been noted that thiol/mercapto and amine group possessing resin used as a chelating resin [21][22][23] and biphenol containing resin exhibits thermosetting, electrical insulating property 24 and in many other electronic device application. 19 In continuation to our earlier communication, [25][26][27] in this article, synthesis and characterization of terpolymer resins prepared from biphenol, thiourea, and formaldehyde are incorporated.…”

Synthesis, Characterization and Ion-Exchange Properties of Terpolymer Resin-II Derived from p-Hydroxybenzaldehyde, Thiourea and Ethylene Glycol

“…5 mL of 0.1 M metal nitrate solution was added. The pH was maintained again and stirred for 24 h. Metal was estimated by a spectrophotometer to determine the distribution ratio (D) between polymer phase and solution phase [15][16][17] …”