ИЗОПРЕН, БУТАДИЕН-СТИРОЛ ВА БУТАДИЕН-НИТРИЛ КАУЧУКЛАРИНИ БУТИЛМЕТАКРИЛАТ БИЛАН СОПОЛИМЕРЛАНИШИНИНГ КИНЕТИК ПАРАМЕТРЛАРИ

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ИЗОПРЕН, БУТАДИЕН-СТИРОЛ ВА БУТАДИЕН-НИТРИЛ КАУЧУКЛАРИНИ БУТИЛМЕТАКРИЛАТ БИЛАН СОПОЛИМЕРЛАНИШИНИНГ КИНЕТИК ПАРАМЕТРЛАРИ

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MAQOLA ANNOTATSIYASI

Background. The copolymerization of monomer thermoplastic polymer with rubber allows you to synthesize thermoplastic elastomers or thermoplastic elastomers (TPE), combining the properties of elastomers during operation, and thermoplastics in the processing. The composition, structure and properties of such polymers are inextricably linked with the method and laws of their preparation. Purpose. Determination of kinetic orders of the synthesis reactions rubber copolymers with acrylic monomers and the activation energy of polymerization. Methodology. Copolymers of isoprene (SKI), styrene butadiene (SKS-30). butadiene-nitrile (SKN-26 and SKN-40) rubbers with n-butylmethacrylate at temperature 60-70°C in the homogeneous phase in a solution of xylene, in the presence of dynyryl ester of anhydrohydrogen, anohydroacetate, anhydroxydihydroacetate, anhydroxydihydrociphenyl, anhydroxydihydro crystalline, anhydroxymethanol the initiator were synthesized. The copolymer was precipitated in ethanol, freed from non-grafted polybutylmethacrylate by extraction with acetone. Originality. The reaction’s order of monomer and initiator, the activation energy of the process for each rubber from their values were determined. Basing on them the impact of structure of the rubber on copolymer’s formation process is detected. Findings. The order of the reaction differs from the monomer values adopted for radical polymerization increases from 1.25 to 1.55 at the transition from the SKI to SKN-40. The presence of nitrile groups in the macromolecules SKN leads to an overestimate of the reaction order of monomer and initiator. The activation energy of the copolymerization process is reduced in a raw of rubbers SKS> SKI> SKN-26> SKN-40. Highlights: * the order of the monomer is higher (1.25-1.55) than the reaction’s order at homopolymerization; * the nitrile group SKN involved in the formation of active centers; * the activation energy of graft copolymerization is 56-87 kJ / mol.

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# бутилметакрилат# butyl methacrylate# термоэластопласт# каучук# порядок реакции# энергия активации.# реакция тартиби# фаолланиш энергияси.# thermoplastic elastomer# rubber# reaction mode# activation energy.

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https://eroi.uz/11.0030/A1219-0009

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