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Textile Journal of Uzbekistan

Abstract

Thermoplastic elastomers are synthesized by the method of graft copolymerization of rubbers of various grades with methacrylic acid esters. The process of copolymerization of isoprene (SKI), styrene butadiene (SRB30) and nitrile butadiene (SRB26 and SRN40) rubbers with n-butyl methacrylate (BMA) and methyl methacrylate occurs in the homogeneous phase in a solution of xylene or xylene with dimethylformamide (DMA). In xylene, the initiator is azoisobutyric acid dimethyl ester (ADE), in the mixture of xylene with DMF, the initiator is potassium persulfate (PP). The dependence of the yield of the graft copolymer on the nature of the elastomer was determined, the yield of copolymers increased with the transition from SRI and SCS30 to SRN, as in the case of ADE and PP. Moreover, the PP turned out to be a more efficient initiator than ADE. The donor-acceptor interaction of nitrile SRN groups with PC leads to an increase in the rate of polymerization and the yield of the graft copolymer. The formation of the copolymer was proved by the removal of the IR spectra of rubber, BMA, and the products of their interaction. In the product of the interaction of rubber with BMA, the absorption bands of the characteristic valence and deformation vibrations of the bonds of both polymers-the carbonyl Engineering Science and Materials: Technology of cotton and textile industry 2 Textile Journal of Uzbekistan №1/2019 group and methylene groups — are found. Inoculation of PBMA occurs at the point of rupture = C – H rubber bonds

References

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