Investigation of synergism during radiation graft copolymerization of binary mixtures of vinyl monomers onto different textile fabrics by a dyeing method
✍ Scribed by El Salmawi, K.; El Naggar, A. M.; Attia, S. E.
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 304 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0959-8103
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✦ Synopsis
Radiation-induced graft copolymerization of binary mixtures of acrylic acid (AAc) and styrene (S) onto cotton, cotton/polyesterÏ and viscose rayon has been investigated. The di †erent factors that may a †ect the total graft yield (the sum of polyacrylic acid (PAAc) fraction and polystyrene (PS) fraction, such as solvent composition, comonomer mixture, and irradiation dose were studied. It was found that there is always a certain solvent composition of (MeOH and and comonomer mixture at which a maximum value of total graft yield H 2 O) (TGY) was obtained. Moreover, the TGY was greatly inÑuenced by other factors such as radiation dosage. An attempt was made to investigate synergism during graft copolymerization, i.e. the e †ect of each monomer on the other and their participation in the resulting graft copolymer. In this respect, the PAAc and PS graft fractions in the resulting graft copolymers of the di †erent textile fabrics under investigation were determined approximately by dyeing with basic dye (Sandocryl Blue) and disperse dye (Samaron Blue FBL). By this method, it was possible to determine each fraction in the graft copolymer. It was also observed that the graft copolymerization increased the dye affinity for such dyestu †s to a great extent. The accuracy and validity of the dyeing method applied was supported by the estimation of the carboxyl group content by analytical technique based on acidÈbase volumetric titration.