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Curing kinetics of bio‐based epoxy resin based on epoxidized soybean oil and green curing agent
Author(s) -
Chen Yahua,
Xi Zhenhao,
Zhao Ling
Publication year - 2017
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15486
Subject(s) - curing (chemistry) , epoxidized soybean oil , autocatalysis , thermosetting polymer , differential scanning calorimetry , epoxy , materials science , isothermal process , soybean oil , catalysis , kinetics , chemical engineering , composite material , polymer chemistry , chemistry , organic chemistry , thermodynamics , raw material , physics , food science , engineering , quantum mechanics
New thermoset with a high bio‐based content was synthesized by curing epoxidized soybean oil (ESO) with a green curing agent maleopimaric acid catalyzed by 2‐ethly‐4‐methylimidazole. Non‐isothermal differential scanning calorimetry and a relatively new integral isoconversional method were used to analyze the curing kinetic behaviors and determine the activation energy (E a ). The two‐parameter Šesták–Berggren autocatalytic model was applied in the mathematical modeling to obtain the reaction orders and the pro‐exponential factor. For anhydride/epoxy group molar ratio equal to 0.7, E a decreased from 82.70 to 80.17 kJ/mol when increasing the amount of catalyst from 0.5 to 1.5 phr toward ESO. The reaction orders m and n were 0.4148 and 1.109, respectively. The predicted non‐isothermal curing rates of Šesták–Berggren model matched perfectly with the experimental data. © 2016 American Institute of Chemical Engineers AIChE J , 63: 147–153, 2017