R. Anbarasan

Characterization of Chemical Grafting of Polyaniline onto Wool Fiber

Abstract Polyaniline grafted wool fiber was prepared by a chemical polymerization method using potassium peroxydisulfate (PDS) as a lone initiator under optimized conditions. The simultaneous homopolymer formed, as well as physisorbed polyaniline (PANI) onto wool fiber, were removed by a systematic procedure. The isolation procedure was quantified through UV-visible spectroscopy. The isolated grafted PANI-wool fiber was tested by conductivity measurements cyclic voltammetrv. and IR spectroscopy to provide further evidence for chemical grafting.

CHEMICAL GRAFTING OF ANILINE AND O-TOLUIDINE ONTO POLY (ETHYLENE TEREPHTHALATE FIBER)

Graft copolymerization of poly(aniline) and poly(o-toluidine) onto poly(ethylene terephthalate) fiber was conducted by using peroxydisulfate as a lone initiator under nitrogen atmosphere at various experimental conditions in aqueous hydrochloric acid medium. The grafting of poly(aniline) and poly(o-toluidine) onto poly(ethylene terephthalate) fiber was verified by recording cyclic voltammetry of the grafted fiber, conductivity measurements, and thermal analysis. Graft parameters-such as % grafting, % efficiency, and the rate of grafting-were followed. Grafting was always accompanied by homopolymerization. The rate of homopolymerization was also followed in all experimental conditions.

Chemical grafting of poly(aniline) and poly(o-toluidine) onto PET fibre — a comparative study

Abstract Oxidative chemical polymerization of aniline and o-toluidine was carried out by using peroxo monosulphate as a lone initiator in an aqueous acidic medium in the presence of PET fibre. The PET fibre was tested for chemical grafting of poly(aniline) (PANI) and poly(o-toluidine) (POT) onto that. The content of PANI (wt%) in the backbone was found to vary while varying the [monomer], [initiator] and amount of fibre during the polymerization of aniline and o-toluidine. Various graft parameters like the rate of grafting (Rg), % grafting and % efficiency were evaluated. The rate of homopolymerization (Rh) was also followed in both cases. The chemical grafting was confirmed using FTIR, UV-Visible and conductivity measurements.

Peroxosalts initiated graft copolymerization of aniline onto wool fibre—a comparative kinetic study

Chemical grafting of aniline (ANI) onto wool fibre was carried out in aqueous acidic medium by using peroxosalts such as peroxodisulphate (PDS) and peroxomonosulphate (PMS) as an initiator for various [Monomer], [Initiator] and (fibre weight). It was observed that both Rh and Rg increased with increase in the concentration of each component. The chemical grafting was confirmed using FTIR spectroscopy, cyclic voltammetry (CV) and conductivity measurements.

Chemical grafting of polyaniline onto nylon66 fiber in different media

Graft copolymerization of polyaniline (PANI) onto nylon 66 fiber was carried out in two different media, hydrochloric acid and p-toluene sulfonic acid (PTSA), using peroxodisulfate (PDS) as an initiator. Percentage grafting, percentage efficiency, and rate of grafting were determined. The grafting of PANI onto nylon 66 was confirmed through FTIR spectroscopy, cyclic voltammetry (CV), weight-loss study, and conductivity measurement.

Peroxydisulphate initiated graft copolymerization of o-toluidine onto synthetic fibres : A kinetic approach

Full Paper: Graft copolymerization of o-toluidine onto poly(ethylene terephthalate) and nylon 66 fibres initiated by peroxy disulphate was carried out under nitrogen atmosphere. Various graft parameters such as rate of grafting, percentage grafting and percentage efficiency were evaluated. The rate of homopolymerization was also determined. The experimental results indicate the first order dependence of both {R_h} and {R_g} on [monomer], [initiator] and (amount of fibre). The chemical grafting was confirmed through cyclic voltammetry, differential thermal analysis, weight loss method and conductivity measurements. A probable mechanism has been proposed to explain the experimental results obtained.

Modification of Nylon 6 into Conducting Fibre by Peroxosalts Initiated Graft Copolymerization - A Kinetic Approach

Abstract Graft copolymerization of polyaniline (PANI) onto nylon6 fibre was carried out by using eroxo disulphate (PDS) and peroxo monosulphate (PMS) as a lone initiator separately under nitrogen atmosphere at various experimental conditions in aqueous HCI medium. The grafting of PANI onto nylon6 fibre was verified by recording cyclic voltammetry and conductivity measurements. The graft parameters such as YO grafting, % efficiency and rate of grafting were followed. Grafting was always accompanied by homopolymerization. The rate of homopolymerization was also followed in all experimental conditions. A comparative account of all these parameters while initiated by PDS or PMS is made.

Peroxosalts initiated graft copolymerization of o-toluidine onto Rayon fibre : A kinetic approach

Abstract Graft copolymerization of o-toluidine (OT) onto Rayon fibre by using peroxy disulphate (PDS) and peroxomonosulphate (PMS) as an initiator in aqueous acidic medium under nitrogen atmosphere was carried out. Rate of homopolymerization, rate of grafting, % grafting and % efficiency were determined. Both rate of homopolymerization and rate of grafting showed first order dependence on [M], [I] and (amount of Rayon fibre). From the experimental results rate constants were evaluated. The modification of Rayon fibre in the form of chemical grafting was confirmed through FTIR, UV-Visible spectroscopy. Cyclic voltammetry, weight loss study and conductivity measurements. Probable mechanism has been proposed to explain the obtained experimental results.

Peroxomonosulphate initiated graft copolymerization of aniline onto poly(propylene) fibre - A kinetic approach

Graft copolymerization of poly(aniline) (PANI) onto poly(propylene) (PP) fibre was carried out in aqueous acidic medium under nitrogen atmosphere by using peroxomonosulphate (PMS) as a lone initiator. The non-conducting fibre was now made into a conducting one through the chemical grafting of PANI units onto the PP fibre backbone. The content of PANI in the backbone was found to vary while varying the [ANI], [PMS] and amount of PP fibre. Various graft parameters were evaluated. The chemical grafting of PANI onto PP fibre was confirmed by conductivity measurements.

Peroxy Disulphate Initiated Graft Copolymerization of o-toluidine onto Wool and Nylon6 Fibres -A Kinetic Approach

Abstract Graft copolymerization of o-toluidine (OT) onto wool and nylon6 fibres were carried out by using Peroxy disulphate (PDS) as a lone initiator in aqueous acidic medium under nitrogen atmosphere. Various graft parameters like % grafting, % grafting efficiency and rate of grafting were determined. Grafting occurs with simultaneous homopolymer formation. Rate of homopolymerization was also followed. The content of poly(o-toluidine) (POT) in the backbone fibres were found to vary while changing the [OT], [PDS], (amount of fibre). Chemical grafting was confirmed by FTIR spectroscopy, cyclicvoltammetry (CV) and conductivity measurements. Probable mechanism has been proposed to explain the experimental results obtained.