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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14689
Title: Development of toughened bio-based epoxy with epoxidized linseed oil as reactive diluent and cured with bio-renewable crosslinker
Authors: Sahoo S.K.
Khandelwal V.
Manik G.
Published in: Polymers for Advanced Technologies
Abstract: In the current work, renewable resourced toughened epoxy blend has been developed using epoxidized linseed oil (ELO) and bio-based crosslinker. Epoxidation of linseed oil was confirmed through FTIR and 1H NMR spectra. The ELO bio-resin was blended at different compositions (10, 20, and 30 phr) with a petroleum-based epoxy (DGEBA) as reactive diluent to reduce the viscosity for better processibility and cured with cardanol-derived phenalkamine to overcome the brittleness. The flow behavior of the neat epoxy and modified bio-epoxy resin blend systems was analyzed by Cross model at low and high shear rates. The tensile and impact behavior studies revealed that the toughened bio-epoxy blend with 20 to 30 phr of ELO showed moderate stiffness with much higher elongation at break 7% to 13%. Incorporation of higher amount of ELO (20 to 30 phr) increases enthalpy of curing without affecting peak temperature of curing. The thermal degradation behavior of the ELO based blends exhibits similar trend as neat epoxy. The higher intensity or broadened loss tangent curve of bio-epoxy blends revealed higher damping ability. FE-SEM analysis showed a rough and rippled surface of bio-based epoxy blends ensuring effective toughening. Reduced viscosity of resin due to maximum possible incorporation of bio-resin and use of phenalkamine as curing agent leads to an eco-friendly toughened epoxy and can be useful for specific coating and structural application. Copyright © 2017 John Wiley & Sons, Ltd.
Citation: Polymers for Advanced Technologies (2018), 29(1): 565-574
URI: https://doi.org/10.1002/pat.4166
http://repository.iitr.ac.in/handle/123456789/14689
Issue Date: 2018
Publisher: John Wiley and Sons Ltd
Keywords: bio-based epoxy
epoxidized oil
phenalkamine
thermomechanical properties
toughening
ISSN: 10427147
Author Scopus IDs: 57203054461
57191897120
56595314900
Author Affiliations: Sahoo, S.K., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Paper Mill Road, Saharanpur, UP 247001, India
Khandelwal, V., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Paper Mill Road, Saharanpur, UP 247001, India
Manik, G., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Paper Mill Road, Saharanpur, UP 247001, India
Funding Details: On behalf of host Institute IIT Roorkee, authors are grateful to Science and Engineering Research Board (SERB), Govt of India for the financial support for the research work under National Post Doctoral Fellowship scheme (File number: PDF/2015/000705). Authors are also thankful to Cardolite Corporation India Pvt Ltd for providing a free sample phenalkamine for the ongoing research project.
Corresponding Author: Manik, G.; Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Paper Mill Road, India; email: gauravmanik3m@gmail.com
Appears in Collections:Journal Publications [PE]

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