Abstract
Radiation induced grafting of various polymers with different monomers proved to be an attractive means to modify the physical or chemical properties of polymeric materials or textile fabrics. In the present work, radiation induced grafting of viscose rayon fabrics, consisting mainly of cellulose fibers, with acrylic acid monomer has been carried out. The grafting yields have been thoroughly studied as a function of different applied experimental parameters. The impact of the graft yield on the physical properties of the fabrics such as tensile strength, elongation, swelling, moisture absorption, crease recovery angle and also the dyeing properties of the fabrics has been studied. The effect of increasing the contact time of the fabric and monomer solution, at room temperature, after stopping irradiation has been studied in detail as well as the effect of temperature on the irradiated samples also after stopping irradiation. The best grafting yield was obtained on irradiating viscose rayon fabric in methanol-water solvent containing acrylic acid monomer, at a dose 20 kGys, then heating for 7 hours at 80℃ and finally keeping the samples at room temperature for about 20 hours. That treatment significantly increased the final graft yield.
Highlights
Radiation induced graft copolymerization of vinyl monomers onto various polymeric materials or textile fabricsHow to cite this paper: Barakat, M.F., El-Salmawy, K.M. and Zahran, A.H. (2016) Radiation Induced Grafting of Acrylic Acid onto Viscose Rayon Fabrics and Its After-Effects
It is clear that on using methanol/water solvent mixture, the graft yield increased on increasing acrylic acid concentration up to 10% and continues to increase, but at a lower rate up to 20% monomer concentration
That lower graft yield could be mainly due to the decreased swelling of the viscose rayon fibers in Dimethyl formamide (DMF)-water solvent which is accompanied with greater homopolymer formation than in case of using methanol-water solvent
Summary
How to cite this paper: Barakat, M.F., El-Salmawy, K.M. and Zahran, A.H. (2016) Radiation Induced Grafting of Acrylic Acid onto Viscose Rayon Fabrics and Its After-Effects. (2016) Radiation Induced Grafting of Acrylic Acid onto Viscose Rayon Fabrics and Its After-Effects. Radiation induced graft copolymerization of acrylic acid onto Nylon-6 gave fibers with better dyeability [4]. Grafting of vinyl pyrolidone onto Nylon-6 by gamma radiations has been reported to result in modified fibers with higher moisture regain and tensile properties [5]. The wet crease recovery of viscose rayon has been found to improve by grafting with acrylic acid monomer [6]. Samples of viscose rayon fabric were grafted with acrylic acid monomer by gamma radiations under different experimental parameters including solvent type and composition, irradiation dose, etc., in a trial to observe the changes in the properties of the modified fabrics, the dyeing properties, as a result of the applied treatments
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