• 文献标题:   Non-isothermal curing kinetics of biocomposite from poly(furfuryl alcohol) and graphene oxide or reduced graphene oxide with different contents of oxygen-groups by DSC
  • 文献类型:   Article
  • 作  者:   VARGASHERNANDEZ MA, SULBARANRANGEL B, VAZQUEZTORRES H
  • 作者关键词:   polyfurfuryl, alcohol, graphene oxide, reduced graphene oxide, differential scanning calorimetry, curing kinetic
  • 出版物名称:   THERMOCHIMICA ACTA
  • ISSN:   0040-6031 EI 1872-762X
  • 通讯作者地址:   Tecnol Estudios Super Ecatepec
  • 被引频次:   0
  • DOI:   10.1016/j.tea.2019.178485
  • 出版年:   2020

▎ 摘  要

The non-isothermal curing kinetics of furfuryl alcohol (FA) with p-toluenesulfonic acid (p-TSA-2 wt%), two graphene oxides with different content of oxygen and a high thermally reduced graphene oxide at different concentrations (2, 4, 6 wt%) were studied by DSC using four heating rates (5, 7.5, 10 and 15 K min(-1)). The graphene particles were characterized by infrared spectroscopy, Raman spectroscopy, C-13 solid-state NMR, and X-ray photoelectron spectroscopy. The formulations highlighted the importance of the amount of graphene as well as the effect of the oxygen groups on the curing process. The results showed that graphene had a catalytic effect on the polymerization reaction of FA depending on the oxidation degree. FA curing presented two well-defined stages: polycondensation at relatively low temperature, and crosslinking at high temperature. The kinetic parameters of Kamal and Kamal-Chem diffusion models were applied successfully for working with experimental data. The double fitting method was used to determine the kinetic parameters and to establish the kinetics equation.