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Liquid crystalline epoxy thermosets with naphthyl mesogen

Abstract : The curing reaction of the diglycidyl ether of 2,7-dihydroxy-naphthalene (2,7-DGEDHN) epoxy mesogenic resin, in the presence of sulfanylamide (SAA), diaminopyridine (DAP) and diaminodiphenylsulfone (DDS) as curing agents, was studied by differential scanning calorimetry, optical microscopy and X-ray diffraction. The curing reaction of 2,7-DGEDHN/SAA mixture led to a texture of nematic-like structure of the Schlieren type. The mixture 2,7-DGEDHN/DAP on curing presents a high-density smectic-like structure of the Schlieren type. The curing reaction of the 2,7-DGEDHN/DDS mixture led to a network without liquid crystalline properties.
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Submitted on : Tuesday, March 1, 2011 - 3:21:33 PM
Last modification on : Thursday, September 24, 2020 - 5:22:54 PM

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Alice Mititelu-Mija, Constantin N. Cascavala, Patrick Navard. Liquid crystalline epoxy thermosets with naphthyl mesogen. Designed Monomers and Polymers, VSP BV, 2005, 8 (5), pp.Pages 487-499. ⟨10.1163/1568555054937944⟩. ⟨hal-00572471⟩

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