Abstract
In this article, Influence of dipole interactions on tensile properties, fracture toughness and glass transition of epoxy resins was investigated by comparing the poly ethylene glycol (PEG) and carboxyl-terminated butadiene acrylonitrile (CTBN) modified epoxy systems. The infrared spectroscopy (IR) spectrums proved that there existed polar interactions between epoxy network and PEG chain. The results showed that dipole interactions played a significant role in influencing on toughness and strength of epoxy resins but had little effect on their glass transition temperature.
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