Menu
Brazil
home Table of contents navigate_before previous current next navigate_next
home Table of contents
ORIGINAL ARTICLE • Polímeros 32 (3) • 2022 • https://doi.org/10.1590/0104-1428.20210088 linkcopy

Open-access Tailoring sustainable compounds using eggshell membrane as biobased epoxy catalyst

AuthorshipSCIMAGO INSTITUTIONS RANKINGS

    Abstract

    In this work eggshell membrane was added as biobased curing catalyst to epoxy (DGEBA), for comparison purposes the synthetic catalyst DEH 35 data was reported, the curing of compounds was followed through differential scanning calorimetry (DSC) under dynamic conditions and their kinetics were modeled using Kissinger, Friedman, Friedman model based and Málek approaches. From evaluated Ea and ln A two steps of curing were verified, for the synthetic catalyst compound (S5) Ea abruptly increased for the degree of conversion α>0.7 the opposite trend was observed for the eggshell membrane compound (M10). It is supposed for S5 Ea increases due to the competitive reactions leading to viscosity increase until reach the solid phase with decrease of the reactive groups availability, hampering the cross-linking, whereas for M10 Ea decreases at α>0.7, hence invalidating the Kissinger model which assumes constant Ea.

    Keywords:
    curing; eggshell membrane; epoxy; kinetics

    vertical_align_top file_download show_chart
    location_on
    Associação Brasileira de Polímeros Rua São Paulo, 994, Caixa postal 490, São Carlos-SP, Tel./Fax: +55 16 3374-3949 - São Carlos - SP - Brazil
    E-mail: revista@abpol.org.br
    rss_feed Stay informed of issues for this journal through your RSS reader
    Accessibility / Report Error