Next Article in Journal
3D Printable Biophotopolymers for in Vivo Bone Regeneration
Next Article in Special Issue
Preparation and Characterization of Surface Photocatalytic Activity with NiO/TiO2 Nanocomposite Structure
Previous Article in Journal
Plasmonic Light Trapping in Thin-Film Solar Cells: Impact of Modeling on Performance Prediction
Previous Article in Special Issue
Preparation of Advanced Carbon Anode Materials from Mesocarbon Microbeads for Use in High C-Rate Lithium Ion Batteries
Open AccessArticle

The Modification of a Tetrafunctional Epoxy and Its Curing Reaction

by Mingming Yu *, Bin Feng, Wang Xie, Lin Fang, Hong Li, Liqi Liu, Musu Ren, Jinliang Sun, Jiabao Zhang and Hefeng Hu
Research Center for Composite Materials, Shanghai University, Shanghai 200072, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Materials 2015, 8(6), 3671-3684; https://doi.org/10.3390/ma8063671
Received: 25 January 2015 / Revised: 8 June 2015 / Accepted: 8 June 2015 / Published: 18 June 2015
(This article belongs to the Special Issue Selected Papers from ICETI2014)
Recent experimental results showed that the Tg of cured resin scarcely decreased and the impact strength of resins increased by over 50% when a tetrafunctional epoxy named N,N,N',N'-tetraglycidyl-4,4'-diaminodiphenyl ether (TGDDE) was introduced to an appropriate flexible chain from a dimer fatty acid (DFA). In order to understand the reason for this phenomenon, the modification and the chemical structure of the prepolymer together with the curing reaction and the viscoelasticity of the cured resins were studied in detail in the present work. The results indicated that the modification would help the prepolymer improve its molecular mobility. As a result, the resins could be further cured, resulting in the cross-linking density increasing. This is because the curing efficiency was increased, but the tetrafunctional epoxy was not cured completely due to its large steric hindrance. Moreover, the flexibility of some parts of the networks was improved, which was beneficial for the toughness of the cured resins. Therefore, the toughness of the tetrafunctional resin was improved with little influence on the thermal properties when the epoxies were modified with an appropriate content of DFA. View Full-Text
Keywords: modification; toughen; TGDDE; dimer fatty acid (DFA); curing reaction modification; toughen; TGDDE; dimer fatty acid (DFA); curing reaction
Show Figures

Figure 1

MDPI and ACS Style

Yu, M.; Feng, B.; Xie, W.; Fang, L.; Li, H.; Liu, L.; Ren, M.; Sun, J.; Zhang, J.; Hu, H. The Modification of a Tetrafunctional Epoxy and Its Curing Reaction. Materials 2015, 8, 3671-3684.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop