Morphology profiles obtained by reaction-induced phase separation in epoxy/polysulfone/poly(ether imide) systems
作者： MI Giannotti , I Mondragon , MJ Galante , PA Oyanguren
DOI: 10.1002/PI.1786
关键词: Phase (matter) 、 Monomer 、 Materials science 、 Ether 、 Epoxy 、 Diglycidyl ether 、 Polymer chemistry 、 Polysulfone 、 Chemical engineering 、 Diamine 、 Miscibility
摘要: The reaction-induced phase separation in epoxy/aromatic diamine formulations simultaneously modified with two immiscible thermoplastics (TPs), poly(ether imide) (PEI) and polysulfone (PSF), has been studied. epoxy monomer was based on the diglycidyl ether of bisphenol A (DGEBA) aromatic 4,4′-methylenebis(3-chloro 2,6-diethylaniline) (MCDEA). Phase-separation conversions are reported for various PSF/PEI proportions blends containing 10 wt% total TP. On basis phase-separation results, a conversion–composition diagram at 200 °C compiled. This used to design particular cure cycles order generate different morphologies during process. It found that, depending ratio employed, particulate or morphology characterized by distribution irregular PEI-rich domains dispersed an epoxy-rich obtained initially miscible blends. Scanning electron microscopy (SEM) characterization revealed that exhibits phase-inverted structure matrix presents bimodal size TP-rich particles. For ratios near miscibility limit, slight temperature change result profiles. Copyright © 2005 Society Chemical Industry
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