Miscibility, Crystallization Behavior and Specific Intermolecular Interactions in Thermosetting Polymer Blends of Novolac Epoxy Resin and Polyethylene Glycol.

The article studies the miscibility, crystallization behavior and intermolecular interactions in thermosetting polymer blends of novolac epoxy resin (EPN) and polyethylene glycol (PEG) using polarized optical microscopy and differential scanning calorimetry. According to the authors, the capability of PEG to crystallize in cured blends was different from that in uncured ones because of the topological effect of the highly crosslinking structure. The authors add that there were intermolecular hydrogen-bonding interactions between EPN and PEG in both cured and uncured blends based on the Fourier transform infrared spectroscopy results.