title: Nanoporous Polymer Films of Cyanate Ester Resins Designed by Using Ionic Liquids as Porogens.
abstract: Novel nanoporous film materials of thermostable cyanate ester resins (CERs) were generated by polycyclotrimerization of dicyanate ester of bisphenol E in the presence of varying amounts (from 20 to 40 wt%) of an ionic liquid (IL), i.e., 1-heptylpyridinium tetrafluoroborate, followed by its quantitative extraction after complete CER network formation. The completion of CER formation and IL extraction was assessed using gel fraction content determination, FTIR,1H NMR, and energy-dispersive X-ray spectroscopy (EDX). SEM and DSC-based thermoporometry analyses demonstrated the formation of nanoporous structures after IL removal from CER networks, thus showing the effective role of IL as a porogen. Pore sizes varied from ~20 to ~180 nm with an average pore diameter of around 45-60 nm depending on the initial IL content. The thermal stability of nanoporous CER-based films was investigated by thermogravimetric analysis.
authors.affiliation: Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, 48, Kharkivske shose, 02160, Kyiv, Ukraine.
authors.forename: Alexander
authors.initials: A
authors.lastname: Fainleib
authors.affiliation: Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, 48, Kharkivske shose, 02160, Kyiv, Ukraine. alina.vashchuk@i.ua.|Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS - Université Paris-Est Créteil Val-de-Marne, 2, rue Henri Dunant, 94320, Thiais, France. alina.vashchuk@i.ua.
authors.forename: Alina
authors.initials: A
authors.lastname: Vashchuk
authors.affiliation: Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, 48, Kharkivske shose, 02160, Kyiv, Ukraine.
authors.forename: Olga
authors.initials: O
authors.lastname: Starostenko
authors.affiliation: Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, 48, Kharkivske shose, 02160, Kyiv, Ukraine.
authors.forename: Olga
authors.initials: O
authors.lastname: Grigoryeva
authors.affiliation: Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine, 50, Kharkivske shose, 02160, Kyiv, Ukraine.
authors.forename: Sergiy
authors.initials: S
authors.lastname: Rogalsky
authors.affiliation: Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS - Université Paris-Est Créteil Val-de-Marne, 2, rue Henri Dunant, 94320, Thiais, France.
authors.forename: Thi-Thanh-Tam
authors.initials: TT
authors.lastname: Nguyen
authors.affiliation: Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS - Université Paris-Est Créteil Val-de-Marne, 2, rue Henri Dunant, 94320, Thiais, France.
authors.forename: Daniel
authors.initials: D
authors.lastname: Grande
keywords: Cyanate ester resins; Ionic liquids; Nanoporous thermosetting films