Comparative analysis of the curing performance of epoxy-containing cross-linking agents of different structure in vulcanization of a promising binder for energetic systems, poly-N-methyl-5-vinyltetrazole prepared by the modification procedure and containing residual N–H-unsubstituted tetrazole fragments, was made. Cross-linking of polymer chains of the binder is a result of alkylation of the residual N–H-unsubstituted tetrazole rings in poly-N-methyl-5-vinyltetrazole macromolecules with oxirane rings of the second reactant. Curing of poly-N-methyl-5-vinyltetrazole in the presence of macromolecular curing agents, carbon-chain polymers containing oxirane rings in pendant chains, at temperatures lower than 100°С occurs in a considerably narrower time interval compared to curing with low-molecular-mass epoxy resin.
Curing of a promising binder for energy-intensive systems, poly- N -methyl-5-vinyltetrazole, produced by the modification method by the reaction with a same-type tetrazole-containing polymer with oxirane rings in its structure was studied. The cross-linking of molecules of dissimilar polymers and the formation of a network structure result from the alkylation reaction of residual N–H-unsubstituted tetrazole rings in poly- N -methyl- 5-vinyltetrazole macromolecules by oxirane rings contained in the structure of the second reactant. It was found that the process of curing of the polymeric system occurs at technologically acceptable rates at temperatures below 100°C at a content of residual N–H-unsubstituted tetrazole rings of no less than 2 mol %. Two to four days are required for the curing (vulcanization) process to be complete, depending on the reaction conditions.
Based on poly(5-vinyltetrazole) and a copolymer of 2-methyl-5-vinyltetrazole with 2-(vinyloxyethoxy)methyloxirane, tetrazole-containing network double polymers capable of gelation both in organic media and in water have been obtained. It has been shown that the covalent bonding of linear polymer macromolecules is the result of alkylation of unsubstituted N-H tetrazole cycles of poly(5-vinyltetrazole) with oxirane cycles incorporated into the copolymer structure.
На основе поли-5-винилтетразола и сополимера 2-метил-5-винилтетразола с 2-(винилоксиэтокси)метилоксираном получены сетчатые тетразолсодержащие парные полимеры, склонные к гелеобразованию, как в органических средах, так и в воде. Ковалентное связывание макромолекул линейных полимеров является результатом реакции алкилирования NH незамещенных тетразольных циклов поли-5-винилтетразола оксирановыми циклами, входящими в структуру сополимера.
