Mechanical and thermal properties of elastic epoxy thermoset cured by cardanol-based diglycidyl epoxy modified polyetheramine

The highly cross-linked epoxy cured network suffers from the brittle nature and poor elongation, which hinders many potential applications. In this study, a biology-based cardanol NC-514S-modified polyether amine D230 was synthesized and used as an epoxy hardener (NC-D230). The effects of NC-514S co...

Full description

Saved in:
Bibliographic Details
Published in:Iranian polymer journal 2022-09, Vol.31 (9), p.1107-1115
Main Authors: Jia, Lingxiao, Chen, Bin, Zhao, Haichao, Lan, Xijian
Format: Article
Language:English
Subjects:
Amines
Ceramics
Chemistry
Chemistry and Materials Science
Composites
Curing agents
Elastic properties
Elongation
Epoxy resins
Glass
Glass transition temperature
Mechanical tests
Modulus of elasticity
Natural Materials
Original Research
Polyethers
Polymer Sciences
Rapid prototyping
Tensile strength
Thermodynamic properties
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The highly cross-linked epoxy cured network suffers from the brittle nature and poor elongation, which hinders many potential applications. In this study, a biology-based cardanol NC-514S-modified polyether amine D230 was synthesized and used as an epoxy hardener (NC-D230). The effects of NC-514S content on the mechanical and thermal properties of the prepared samples were investigated. At the same time, we used cyclic stretching to further characterize its mechanical strength, and characterized the curing agent before and after modification through SEM and FTIR. Mechanical tests on the samples showed that the increase of NC-514S content results in lower tensile strength and Young’s modulus but an increase in elongation-at-breaks. DSC and TGA analyses showed a decreasing trend of glass transition temperature with the addition of NC-514S. Typically, the epoxy thermoset without/with 75% (by wt) NC-514S-modified D230 decreased tensile strength from 61.7 to 17.74 MPa, and Young’s modulus from 496 to 11.56 MPa. It increased elongation from 13.43% to 97.97%, and decreased glass temperature from 87.5 to 51.9 °C by DSC and 87.8 to 54.7 °C by DMA, respectively. This novel bio-based renewable cashew phenol-modified polyetheramine may provide an ideal candidate for toughening an epoxy-based thermosetting materials. At the same time, it also provides a new way for the toughening of epoxy resin. Graphical abstract
ISSN:1026-1265
1735-5265
DOI:10.1007/s13726-022-01062-8