{"id":2596,"date":"2019-03-20T11:52:16","date_gmt":"2019-03-20T08:52:16","guid":{"rendered":"http:\/\/polymerjournal.kiev.ua\/en\/?page_id=2596"},"modified":"2019-04-03T11:35:10","modified_gmt":"2019-04-03T08:35:10","slug":"2019-1-3","status":"publish","type":"page","link":"http:\/\/polymerjournal.kiev.ua\/en\/2019-1-3\/","title":{"rendered":"2019 (1) 3"},"content":{"rendered":"

https:\/\/doi.org\/10.15407\/polymerj.41.01.026<\/a><\/p>\n

Peculiarities of structure formation and the properties of silver-containing polymer composites based on chemically modified melamine-formaldehyde polymer <\/strong><\/p>\n

\u00a0<\/em><\/strong><\/p>\n

A.L. Tolstov<\/em><\/strong>1<\/em><\/strong>, V.F. Matyushov<\/em><\/strong>1<\/em><\/strong>, D.A. Klymchuk<\/em><\/strong>2<\/em><\/strong>, E.V.\u00a0Lebedev<\/em><\/strong>1<\/em><\/strong><\/p>\n

 <\/p>\n

1Institute of Macromolecular Chemistry NAS of Ukraine<\/p>\n

48, Kharkivske shose, \u041ayiv, 02160, Ukraine; e-mail: a.tolstov@ukr.net<\/u><\/p>\n

2N.G. Kholodny Institute of Botany NAS of Ukraine<\/p>\n

2, Tereshchenkivska str., Kyiv, 01601, Ukraine<\/p>\n

 <\/p>\n

Polym. J., 2019, 4<\/strong>1<\/strong>, no. 1: 26-33<\/p>\n

 <\/p>\n

Section: Structure and properties.<\/p>\n

 <\/p>\n

Language: Ukrainian.<\/p>\n

 <\/p>\n

Abstract:<\/p>\n

\u00a0<\/em><\/p>\n

Here we have proposed a method of chemical modification of melamine-formaldehyde resins (MFR) and MFR-based polymer materials by reactive isocyanate-terminated oligomers to improve a hydrophilicity and permeability of the polymer matrix. The chemical structure of modified polymer matrices as well as the compositional and physical-chemical characteristics of modified polymers and their composites were studied by FTIR and UV-vis spectroscopy, energy-dispersive X-ray spectroscopy, morphology analysis, conductometry and gravimetry.<\/em> It was found that introducing the oligomeric modifiers into chemical structure of melamine-formaldehyde polymer during crosslinking process provides a formation of phase-separated polymer systems, reducing cross-links density and increasing sorption capacity of the matrix to polar molecules and ions. As a result, water sorption capacity for chemically modified polymer matrices grows up to 1,1-2,6 times, and relative sorption of Ag<\/em>+<\/em>\u00a0ions increases from 0,015 (unmodified MFR) to 0,047-0,065 g\/g due to increased content of highly polar and coordination-active functional groups. Applying chemically modified melamine-formaldehyde matrices for preparing silver-containing composites via sorption approach allows to produce the polymer materials with gradient silver distribution in bulk. Peculiarities of chemical and phase structure of modified melamine-formaldehyde polymer provide the higher concentration of silver spread deep into a surface layer of the matrix up to 80 <\/em>\u043c<\/em>m. The average silver content in a surface layer with a thickness of ~5 <\/em>\u043c<\/em>m is about 12 %. <\/em><\/p>\n

\u00a0<\/strong><\/p>\n

Keywords:<\/strong> melamine-formaldehyde polymer, oligomers, chemical modification, silver, properties.<\/p>\n

 <\/p>\n

References<\/strong><\/p>\n

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    https:\/\/doi.org\/10.15407\/polymerj.41.01.026 Peculiarities of structure formation and the properties of silver-containing polymer composites based on chemically modified melamine-formaldehyde polymer \u00a0 A.L. Tolstov1, V.F. Matyushov1, D.A. Klymchuk2, E.V.\u00a0Lebedev1   1Institute of Macromolecular Chemistry NAS of Ukraine 48, Kharkivske shose, \u041ayiv, 02160, Ukraine; e-mail: a.tolstov@ukr.net 2N.G. Kholodny Institute of Botany NAS of Ukraine 2, Tereshchenkivska str., Kyiv, 01601, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"acf":[],"_links":{"self":[{"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages\/2596"}],"collection":[{"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/comments?post=2596"}],"version-history":[{"count":3,"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages\/2596\/revisions"}],"predecessor-version":[{"id":2615,"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages\/2596\/revisions\/2615"}],"wp:attachment":[{"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/media?parent=2596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}