Enhancement of intrinsic thermal conductivity of liquid crystalline epoxy through the strategy of interlocked polymer networks

Abstract

To enhance intrinsic thermal conduction of liquid crystalline epoxy (LCE), a novel strategy based on interlocked polymer networks is proposed. Two cured versions of LCE respectively containing Schiff base bonds...

Enhancing intrinsic thermal conductivities of epoxy resins by introducing biphenyl mesogen-containing liquid crystalline co-curing agents

“…In contrast, LCER1, LCER2, and LCER3 present a strong scattering in their SAXS curves, demonstrating fluctuations of the electron density, which suggests the presence of regions of mesogenic unit aggregation and microphase separation. 47 The above results indicate that the microscopically ordered structure is enhanced by increasing the mass fraction of BLCM. In the meantime, the POM images of LCER1, LCER2, and LCER3 (Fig.…”

Effect of the Structure of Epoxy Monomers and Curing Agents: Toward Making Intrinsically Highly Thermally Conductive and Low-Dielectric Epoxy Resins

“…It is noteworthy that the diffraction peaks of cured LCE-based samples were weaker compared with that of the LCE monomer. This is ascribed to the fact that the curing agents that lack the mesogenic units will make the mesogenic groups hard to aggregate on a large scale and the cross-linked network will also generate hindrance for the formation of ordered regions . However, a smaller scale of regular regions was still formed due to the irresistible tendency of mesogen aggregating.…”

“…The intrinsic thermal conduction of the obtained epoxy resins was enhanced by 141%. Zhang et al 30 fabricated an interlocked liquid crystalline epoxy (LCE) copolymer network through topological reorganization enabled by the dynamic Schiff base bond and the Diels–Alder bond. The thermal conduction of the interlocked polymer network was improved to 0.329 W/(m·K) from 0.218 and 0.255 W/(m·K) of the parent single polymer networks.…”

Phase-controllable topochemical polymerization of liquid crystalline epoxy according to spacer length

“…9,10 Over the decades, various studies have focused on overcoming the limitations of thermally conductive matter. 11–15 The methods to improve the thermal conductivities of polymer materials may be divided into two main categories. 16–18 The first is the development of a polymer composite material using fillers, such as ceramics, metals, and carbon fibers.…”