STUDY OF THE SYNTHESIS MECHANISM AND SOME PROPERTIES OF OLIGOMERS BASED ON EPICHLOROHYDRIN AND DIPHENYLGUANIDINE

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12 ноябр 2024

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STUDY OF THE SYNTHESIS MECHANISM AND SOME PROPERTIES OF OLIGOMERS BASED ON EPICHLOROHYDRIN AND DIPHENYLGUANIDINE

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In this work, the synthesis and the scheme for obtaining an oligomer based on epiiodhydrin with diphenylguanidine were studied, the proportions of epiiodhydrin in the initial mixture, the yield of oligomers, and the reduced viscosity were studied. The results of spectroscopic and elemental analyzes are obtained, which show that changes in the ratio of monomers have almost no effect on the iodine content in the oligomer. This is apparently due to the fact that epiiodhydrin is much more active in reactions than amino compounds. By studying the degree of conversion on the viscosity of the oligomerization products, the effects on the intrinsic viscosity of the oligomer were determined. The use of epiiodhydrin is due to its high reactivity due to the activity of the epoxy group and the mobility of the iodine atom of the iodomethyl group. In addition, based on a study of literary sources, we found that most of the substances intended to stabilize and slow down the combustion of polymer compositions contain ionically or covalently bound iodine, which gives them such valuable specific properties. The properties of surfactants are formed in the process of their synthesis, since the mechanism and patterns of synthesis are interrelated with the properties of the compounds. We have studied the interaction of epiiodhydrin with diphenylguanidine and found that spontaneous oligomerization occurs at a sufficient rate in bulk at room temperature. Spontaneous polymerization of epiiodhydrin with diphenylguanidine was studied by the dilatometric method, and the contraction coefficient, which determines the degree of change in the volume of the monomer mixture, was also studied. The mechanism of synthesis, the structure of the final product, technological and kinetic regularities of the process make it possible to predict the physical and colloid-chemical properties of oligomers. Determining the properties of products in conjunction with mathematical modeling of synthesis is the subject of further research.

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# synthesis# kinetics# spectroscopy# oligomer# epiodhydrin# diphenylguanidine

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https://eroi.uz/11.0008/A1124-0001

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