Structural properties of vegetable oil thermosets: Effect of crosslinkers, modifiers and oxidative aging

SEBASTIÁN ANBINDER; M. A. MOSIEWICKI; MEIORIN, C; ARANGUREN, M. I.; C. MACCHI; SOMOZA, ALBERTO

EUROPEAN POLYMER JOURNAL

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2020 vol. 124

0014-3057

  Sebastián Anbinder, Cintia Meiorin, Carlos Macchi, Mirna A.Mosiewicki,Mirta I. Aranguren*, Alberto Somoza*, "Structural properties of vegetableoil thermosets: Effect of crosslinkers, modifiers and oxidative aging", European Polymer Journal, Vol 124, 5 February 2020, (Article number 109470) DOI: 10.1016/j.eurpolymj.2019.109470<!-- /* Font Definitions */ @font-face{font-family:Courier;panose-1:2 0 5 0 0 0 0 0 0 0;mso-font-charset:0;mso-generic-font-family:auto;mso-font-pitch:variable;mso-font-signature:3 0 0 0 3 0;}@font-face{font-family:"Cambria Math";panose-1:2 4 5 3 5 4 6 3 2 4;mso-font-charset:0;mso-generic-font-family:roman;mso-font-pitch:variable;mso-font-signature:-536870145 1107305727 0 0 415 0;}@font-face{font-family:Times;panose-1:2 0 5 0 0 0 0 0 0 0;mso-font-charset:0;mso-generic-font-family:auto;mso-font-pitch:variable;mso-font-signature:3 0 0 0 7 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal{mso-style-unhide:no;mso-style-qformat:yes;mso-style-parent:"";margin:0cm;margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-font-family:"Times New Roman";}.MsoChpDefault{mso-style-type:export-only;mso-default-props:yes;font-size:10.0pt;mso-ansi-font-size:10.0pt;mso-bidi-font-size:10.0pt;font-family:Courier;mso-ascii-font-family:Courier;mso-fareast-font-family:Courier;mso-hansi-font-family:Courier;}size:612.0pt 792.0pt;margin:72.0pt 72.0pt 72.0pt 72.0pt;mso-header-margin:36.0pt;mso-footer-margin:36.0pt;mso-paper-source:0;}div.WordSection1{page:WordSection1;}mso-level-number-format:roman-lower;mso-level-tab-stop:324.0pt;mso-level-number-position:right;text-indent:-9.0pt;}ol{margin-bottom:0cm;}ul{margin-bottom:0cm;}The present work is focused on thestudy of the formulation effect of cationically polymerized vegetable oilthermoset on their aging behavior. Toward this aim, tung oil-based biopolymers wereprepared using different comonomers or adding a modifier. Specifically,synthetic and natural comonomers (styrene, divinylbenzene and a methyl ester oftung oil) and a modifier (acrylated epoxidized soybean oil) were used toprepare different crosslinked samples with afixed weight ratio of tungoil/comonomer (or modifier) = 70/30. The chemical aging suffered by the fattyacid segments of the matrix, which is known as autoxidation of unsaturatedfatty acids in oils and alkyd resins, was followed by Fourier transformedinfrared spectroscopy, dynamic-mechanical analysis, positron annihilationlifetime spectroscopy and thermogravimetric analysis. As a result, values ofthe glass transition temperature, the storage moduli, tan d and the freenanohole volumes were obtained. To study the influence of the aging process onthe network structures at molecular level, the evolutions of the glass transitiontemperatures, storage moduli, tan d and free nanohole volumes were followed forone year at two different aging conditions: room temperature and 50 °C. Thechemical changes leading to nanostructural variations in all the studiedsamples are discussed in terms of the formed networks and the degradativeprocesses during aging.<!-- /* Font Definitions */ @font-face{font-family:"Cambria Math";panose-1:2 4 5 3 5 4 6 3 2 4;mso-font-charset:0;mso-generic-font-family:roman;mso-font-pitch:variable;mso-font-signature:-536870145 1107305727 0 0 415 0;}@font-face{font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;mso-font-charset:0;mso-generic-font-family:swiss;mso-font-pitch:variable;mso-font-signature:-536859905 -1073732485 9 0 511 0;}@font-face{font-family:Times;panose-1:2 0 5 0 0 0 0 0 0 0;mso-font-charset:0;mso-generic-font-family:auto;mso-font-pitch:variable;mso-font-signature:3 0 0 0 7 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal{mso-style-unhide:no;mso-style-qformat:yes;mso-style-parent:"";margin:0cm;margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:12.0pt;font-family:Times;mso-fareast-font-family:Calibri;mso-fareast-theme-font:minor-latin;mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi;}.MsoChpDefault{mso-style-type:export-only;mso-default-props:yes;font-family:Times;mso-ascii-font-family:Times;mso-fareast-font-family:Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-font-family:Times;mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi;}size:595.0pt 842.0pt;margin:72.0pt 72.0pt 72.0pt 72.0pt;mso-header-margin:35.45pt;mso-footer-margin:35.45pt;mso-paper-source:0;}div.WordSection1{page:WordSection1;}