Cure kinetic study of epoxidized hemp oil cured with a multiple catalytic system

Manthey, Nathan W. and Cardona, Francisco and Aravinthan, Thiru (2012) Cure kinetic study of epoxidized hemp oil cured with a multiple catalytic system. Journal of Applied Polymer Science, 125 (S2). E511-E517. ISSN 0021-8995

Abstract

The cure kinetics of two epoxidized hemp oil (EHO) based bioresins were studied and compared under both dynamic and isothermal conditions using differential scanning calorimetry (DSC). Neat triethylenetetramine (TETA) for the first system and a combination of isophorone diamine (IPD) and TETA for the second system were used as the hardeners for the two EHO-based bioresins. Lower total heats of reaction and an approximate 10% decrease in activation energies were observed for the IPD/TETA system. Maximum conversions of the TETA/IPD system were consistently higher than those of the TETA system throughout the entire temperature range suggesting enhanced curing characteristics. Kissinger and Ozawa–Flynn–Wall models were used to determine activation energies from dynamic DSC data. Both bioresin systems were found to display autocatalytic behavior with the TETA/IPD system showing high nth order influence. Kamal's autocatalytic isothermal model, modified to account for diffusion postvitrification was found to satisfactorily describe the cure behavior of both bioresin systems. Overall, the addition of IPD was found to increase the curing rate of the EHO bioresin systems.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published Version in accordance with the copyright policy of the publisher.
Depositing User: Mr Nathan Manthey
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 01 Nov 2012 02:17
Last Modified: 03 Jul 2013 01:17
Uncontrolled Keywords: biopolymers; curing of polymers; differential scanning calorimetry (DSC); kinetics (polym.); renewable resources
Fields of Research (FOR2008): 03 Chemical Sciences > 0307 Theoretical and Computational Chemistry > 030703 Reaction Kinetics and Dynamics
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030306 Synthesis of Materials
Socio-Economic Objective (SEO2008): B Economic Development > 86 Manufacturing > 8603 Processed Non-Food Agriculture Products (excl. Wood, Paper and Fibre) > 860303 Plant Extracts (e.g. Pyrethrum, Alkaloids, Jojoba Oil)
B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870303 Polymeric Materials (e.g. Paints)
Identification Number or DOI: doi: 10.1002/app.35561
URI: http://eprints.usq.edu.au/id/eprint/21674

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