Synthesis and Properties Study of Liquid Crystalline Epoxy Resin Containing Azomethine-Based Monomeric Mesogens
Junjie Huang, Hongmei Pan, Deliang Le, Zengxin Ouyang, Kemei Pei
TL;DR
This paper reports the synthesis of a liquid crystalline epoxy resin with improved properties like toughness and thermal conductivity.
Contribution
A novel epoxy resin containing azomethine-based mesogens was synthesized and shown to have enhanced mechanical and thermal properties.
Findings
The epoxy monomer exhibits reversible liquid crystal properties with a 14.4% liquid crystal fraction after curing at 120 °C.
The resin's fracture toughness and thermal conductivity are higher than those of ordinary epoxy resins.
DSC, XRD, and POM confirmed the liquid crystalline behavior of the synthesized monomer.
Abstract
The epoxy monomer N,1-bis(4-(2-oxiranemethoxy)phenyl)methylamine (HBAP-EP) was synthesized through the Schiff base reaction and epichlorohydrin method, and the HBAP-EP monomer was cured using p-aminobenzene sulfonamide (SAA). Differential scanning calorimetry (DSC), X-ray diffraction (XRD), and polarizing optical microscopy (POM) demonstrated that the epoxy monomer exhibits reversible liquid crystal properties, and the liquid crystal fraction of the monomer can reach 14.4% after curing at 120 °C. The fracture toughness of the resin cured at 120 °C can reach 0.93 KJ·m−2, and its thermal conductivity is 0.3229 W·(m·K)−1, both of which are higher than those of ordinary epoxy resin.
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Taxonomy
TopicsEpoxy Resin Curing Processes · Synthesis and properties of polymers · Liquid Crystal Research Advancements