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The miscibility and morphology of epoxy resin/poly(ethylene oxide) blends
journal contributionposted on 1991-01-01, 00:00 authored by Qipeng Guo, P Xinsheng, W Zhiji
Poly(ethylene oxide) (PEO) was found to be miscible with uncured epoxy resin, diglycidyl ether of bisphenol A (DGEBA), as shown by the existence of a single glass transition temperature (T g ) in each blend. However, PEO with M n = 20 000 was judged to be immiscible with the highly amine-crosslinked epoxy resin (ER). The miscibility and morphology of the ER/PEO blends was remarkably affected by crosslinking. It was observed that phase separation in the ER/PEO blends occurred as the crosslinking progressed. This is considered to be due to the dramatic change in the chemical and physical nature of ER during the crosslinking.