Jump to main content
Jump to site search

Issue 43, 2018
Previous Article Next Article

Characteristics of water absorption in amine-cured epoxy networks: a molecular simulation and experimental study

Author affiliations

Abstract

Moisture corrosion of cured epoxy resins seriously affects the durability of epoxy products and has been a serious issue in scientific and engineering fields. In this study, a series of cured epoxy resins with different structures were prepared by tuning their curing conversion in both experimental and simulation methods. In experiments, the equilibrium water content and the diffusion coefficient of amine-cured epoxy resins were measured by gravimetric measurement. The interaction between water molecules and epoxy network was investigated by time-resolved FTIR, difference spectroscopy and 2D correlation spectroscopy. In simulation, the hydrogen bonds, the mobility of hydroxypropyl ether groups and water molecules, and the free volume with its distributions were analyzed. Five types of water molecules were intuitively observed in this study; free volume had a stronger influence on equilibrium water content than polarity in the bifunctional epoxy/amine system, and the increase in the diffusion coefficient was considered as the result of reduction in motion resistance and an increase in channels for the motion of water molecules.

Graphical abstract: Characteristics of water absorption in amine-cured epoxy networks: a molecular simulation and experimental study

Back to tab navigation

Publication details

The article was received on 25 Jul 2018, accepted on 08 Oct 2018 and first published on 09 Oct 2018


Article type: Paper
DOI: 10.1039/C8SM01516C
Citation: Soft Matter, 2018,14, 8740-8749
  •   Request permissions

    Characteristics of water absorption in amine-cured epoxy networks: a molecular simulation and experimental study

    D. Zhang, K. Li, Y. Li, H. Sun, J. Cheng and J. Zhang, Soft Matter, 2018, 14, 8740
    DOI: 10.1039/C8SM01516C

Search articles by author

Spotlight

Advertisements