Liquid‐crystalline epoxy resins: a glycidyl‐terminated benzaldehyde azine cured in the nematic phase

Abstract

A novel glycidyl-terminated benzaldehyde azine was synthesized and subsequently cured with an aromatic diamine. The resulting liquid-crystalline network was characterized by means of optical microscopy, X-ray analysis and dynamic-mechanical analysis. The influence of the curing temperature on the nematic textures is pointed out. The curing reaction was followed by means of differential scanning calorimetry and dielectric analysis.

The effect of mesogenic length on the curing behavior and properties of liquid crystalline epoxy resins

“…Ober et al synthesized symmetric twin LCE resins [9] and Jahromi et al [10][11][12][13] and Broer et al [14] reported the curing reaction of aromatic ester based LCE resins. In addition, biphenol epoxy resin [8,[15][16][17], azo epoxy resin [16], chalcone epoxy resin [18], azine epoxy resin [19], azomethine [20] and binaphthyl epoxy resin [21] were studied by many research groups. These studies mainly reported the curing behavior, anisotropic orientation and morphology of cured liquid crystalline thermosets.…”

Liquid crystalline elastomers based on diglycidyl terminated rigid monomers and aliphatic acids. Part 1. Synthesis and characterization

“…It was demonstrated that in the case of epoxies with highly crosslinked structures, superior mechanical properties, thermostability and chemical resistance were obtained [12,[26][27][28][29][30][31].…”

Liquid crystalline photoactive hyperbranched and linear benzylidene polyester with terminal epoxy and pendant hydroxyl groups

“…27,28 They are highly promising polymeric materials as the oriented liquid crystal networks can be used as an optical compensation film for a liquid crystal display. 29 Fabrication of uniaxially oriented nematic networks from diepoxy monomer in presence of photointiator was demonstrated by Broer et al 30 A large number of reports are available on synthesis of liquid crystalline epoxy polymers with variety of nonphotoactive mesogens [31][32][33][34][35] and photoactive mesogens [36][37][38][39][40] due to their potential utilization in the development of magnetic/ electric field or light induced liquid crystalline networks formation.…”