Structure−Property relationships in nanocomposites based on cyanate ester resins and 1-heptyl pyridinium tetrafluoroborate ionic liquid
作者： A. Vashchuk , A. Rios de Anda , O. Starostenko , O. Grigoryeva , P. Sotta
DOI: 10.1016/J.POLYMER.2018.06.015
关键词:
摘要: Abstract Novel thermosetting systems based on cyanate ester resins (CERs) have been created through the polycyclotrimerization reaction of dicyanate bisphenol E (DCBE) in presence different amounts 1-heptyl pyridinium tetrafluoroborate [HPyr][BF4] Ionic Liquid (IL). A significant accelerating effect curing kinetics DCBE was found by FTIR analysis. The mechanism for [HPyr][BF4]-catalyzed newly proposed via formation a [CN]δ+–[HPyr]δ− complex as key intermediate. Structure–properties relationships thermostable CER/IL networks were investigated using DSC, DMTA, dielectric spectroscopy, tensile testing, quasi-dc measurements (I-V characteristics), and TGA. All nanocomposites showed excellent thermal stability up to 300 °C, indicating densely crosslinked network even at high IL content (40 wt%), they could be used temperatures above their Tg without degradation. Nanoscale phase separation led creation ionic channels within CER matrix ensure photosensitivity properties.
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