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Cure kinetics of an acrylated epoxidized hemp oil‐based bioresin system
Author(s) -
Francucci Gaston,
Cardona Francisco,
Manthey Nathan W.
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38380
Subject(s) - autocatalysis , differential scanning calorimetry , curing (chemistry) , kinetics , materials science , isothermal process , vitrification , activation energy , polymer chemistry , epoxidized soybean oil , thermodynamics , chemical engineering , chemistry , organic chemistry , raw material , physics , quantum mechanics , engineering , nuclear physics
In this work, the cure kinetics of a novel acrylated epoxidized hemp oil (AEHO)‐based bioresin was investigated for the first time by differential scanning calorimetry (DSC) using both isothermal and nonisothermal conditions. This new bioresin was synthesized by the acrylation of a previously epoxidized hemp oil (EHO) bioresin. The curing of the AEHO bioresin showed an autocatalytic behavior with the vitrification phenomenon preventing the conversion reaching unity for all the temperatures studied. It was found that the curing behavior can be modeled with high accuracy using a modified Kamal autocatalytic model that takes into account the vitrification phenomenon. Dynamic activation energies were determined from the Kissinger and Ozawa–Flynn–Wall methods, resulting in 58.87 and 62.02 kJmol −1 , respectively. In addition, activation energies associated with the autocatalytic model constants, k 1 and k 2 , were established to be equal to 58.94 and 45.32 kJmol −1 , respectively. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013