Cure kinetics of an epoxidized hemp oil based bioresin system
Article
Article Title | Cure kinetics of an epoxidized hemp oil based bioresin system |
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ERA Journal ID | 1671 |
Article Category | Article |
Authors | Manthey, Nathan W. (Author), Cardona, Francisco (Author), Aravinthan, Thiru (Author) and Cooney, Tyson (Author) |
Journal Title | Journal of Applied Polymer Science |
Journal Citation | 122 (1), pp. 444-451 |
Number of Pages | 8 |
Year | 2011 |
Publisher | John Wiley & Sons |
Place of Publication | Hoboken, NJ. United States |
ISSN | 0021-8995 |
1097-4628 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/app.34086 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1002/app.34086/ |
Abstract | A novel epoxidized hemp oil (EHO) based bioresin was synthesised by epoxidation in situ with peroxyacetic acid. In this research the cure kinetics of an EHO based bioresin system cured with Triethylenetetramine (TETA) was studied by Differential Scanning Calorimetry (DSC) using both isothermal and non-isothermal data. The results show that the curing behaviour can be modelled with a modified Kamal autocatalytic model that accounts for a shift to a diffusion-controlled reaction post-vitrification. The total order of the reaction was found to decrease with an increase in temperature from approximately 5.2 at 110°C to approximately 2.4 at 120°C. Dynamic activation energies were determined from the Kissinger (51.8 kJ/mole) and Ozawa-Flynn-Wall (56.3 kJ/mole) methods. Activation energies determined from the autocatalytic method were 139.5 kJ/mole and -80.5 kJ/mole. The observed negative activation energy is thought to be due to an unidentified competitive reaction that gives rise to the appearance of decreasing with increasing temperature. The agreement of fit of the model predictions with experimental values was satisfactory for all temperatures. |
Keywords | biopolymers; curing of polymers; differential scanning calorimetry (DSC); kinetics (polym.); renewable resources |
ANZSRC Field of Research 2020 | 340607. Reaction kinetics and dynamics |
400505. Construction materials | |
340399. Macromolecular and materials chemistry not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q0v5q/cure-kinetics-of-an-epoxidized-hemp-oil-based-bioresin-system
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