Accepted Manuscript

Title: Study of curing kinetics of anhydride curedpetroleum-based (DGEBA) epoxy resin and renewableresource based epoxidized soybean oil (ESO) systemscatalyzed by 2-methylimidazole

Author: Sudheer Kumar Sushanta K. Samal Smita MohantySanjay K. Nayak

PII: S0040-6031(17)30131-4DOI: http://dx.doi.org/doi:10.1016/j.tca.2017.05.016Reference: TCA 77750

To appear in: Thermochimica Acta

Received date: 21-3-2017Revised date: 3-5-2017Accepted date: 19-5-2017

Please cite this article as: S. Kumar, S.K. Samal, S. Mohanty, S.K. Nayak,Study of curing kinetics of anhydride cured petroleum-based (DGEBA)epoxy resin and renewable resource based epoxidized soybean oil (ESO)systems catalyzed by 2-methylimidazole, Thermochimica Acta (2017),http://dx.doi.org/10.1016/j.tca.2017.05.016

This is a PDF file of an unedited manuscript that has been accepted for publication.As a service to our customers we are providing this early version of the manuscript.The manuscript will undergo copyediting, typesetting, and review of the resulting proofbefore it is published in its final form. Please note that during the production processerrors may be discovered which could affect the content, and all legal disclaimers thatapply to the journal pertain.

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Study of Curing Kinetics of Anhydride Cured Petroleum-based (DGEBA) 1

Epoxy Resin and Renewable Resource based Epoxidized Soybean Oil 2

(ESO) Systems Catalyzed by 2-Methylimidazole 3

Sudheer Kumar, Sushanta K. Samal, Smita Mohanty, Sanjay K. Nayak 4

Laboratory for Advanced Research in Polymeric Materials (LARPM), 5

Central Institute of Plastic Engineering & Technology (CIPET), B/25, CNI complex, Patia, 6

Bhubaneswar 751024, Odisha, India, Fax: +91-674-2743863; Tel: +91-674-2742852 7

*Corresponding Author, E-mail: sudheerkumar.211@gmail.com 8

Abstract 9

The non-isothermal curing kinetics of diglycidyl ether of bisphenol-A (DGEBA) and bio-10

based epoxy resin (ESO) both cured with methyl hexahydrophthalic anhydride (MHHPA) 11

curing agent in the presence of 2-methylimidazole as catalyst (2-MI) was investigated using 12

differential scanning calorimetry (DSC) at three different heating rates 5, 10, 15 ºC/min. The 13

peak temperature was found to be dependent on the heating rates and the structure of 14

anhydride as well as molar ratio of epoxy groups to MHHPA and catalyst. The activation 15

energy (Ea) was determined by Kissinger and Ozawa methods. The two kinetic parameter m 16

and n were obtained by Sestak-Berggren autocatalytic model. The curve obtained by the 17

predicted values of the non-isothermal Malek method matched perfectly with the 18

experimental data for DGEBA, ESO and their blend. 19

Keywords: Petroleum-based (DGEBA) epoxy resin; Bio-resin (ESO); Activation energy; 20

curing agent (MHHPA). 21

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