New liquid-crystalline thermosets from liquid-crystalline bisazomethynic epoxy resins with naphthylene disruptors in the central core

Epoxy resin (EP) is one of the most famous thermoset materials. In general, because EP has a three-dimensional random network, it possesses thermal properties similar to those of a typical heat insulator. Recently, there has been substantial interest in controlling the network structure of EP to create new functionalities. Indeed, the modified EP, represented as liquid crystalline epoxy (LCE), is considered promising for producing novel functionalities, which cannot be obtained from conventional EPs, by replacing the random network structure with an oriented one. In this paper, we review the current progress in the field of LCEs and their application to highly thermally conductive composite materials.

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Oligomers and Dendrimers Based on Siloxane and Silsesquioxane Cores: Does the Structure of the Central Core Affect the Liquid-Crystalline Properties?

Molecular Crystals and Liquid Crystals Science and Technology Section A Molecular Crystals and Liquid Crystals ◽

10.1080/10587259908023791 ◽

1999 ◽

Vol 332 (1) ◽

pp. 455-461 ◽

Cited By ~ 26

Author(s):

G. H. Mehl ◽

A. J. Thornton ◽

J. W. Goodby

Keyword(s):

Liquid Crystalline ◽

Central Core ◽

Core Affect

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Synthesis of Three Novel Aromatic Biazomethine Liquid- Crystalline Epoxy Resins and Curing Reaction with Aromatic Diamine

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.216.34 ◽

2011 ◽

Vol 216 ◽

pp. 34-38

Author(s):

Jun Gang Gao ◽

Xiao Na Zhang ◽

Yong Gang Du

Keyword(s):

Melting Point ◽

Epoxy Resins ◽

Liquid Crystalline ◽

Diphenyl Ether ◽

Hydroxyl Group ◽

Aromatic Diamine ◽

Curing Reaction ◽

Ozawa Equation ◽

Liquid Crystalline Epoxy ◽

Clearing Temperature

Three class of novel liquid crystalline epoxy resins containing azomething groups: N,N’-Bis[4-(2,3-epoxypropoxy)benzylidene]-4,4-diamino-diphenyl ether (p-BEPBDDE), N,N’-Bis[4-(2,3-epoxypropoxy)benzylidene]-4,4-diamino-diphenyl methane (p-BEPBDDM) and N,N’-Bis[(4-(2,3-epoxypropoxy)-benzyliden)-1,4- phenylene diamine] (p-BEPBPD) were synthesized and characterized. The results show that p-BEBDDE and p-BEBDDM belong to smectic texture and melting point is 239.5 and 178 oC, respectively. The p-BEPBD is nematic texture between its melting temperature (Tm) of 192 oC and clearing temperature (Ti) of 238 oC. The curing reaction can be described by Ozawa equation, and the alcohol-hydroxyl group can accelerate the curing reaction and decrease Ea in DSC experiment.

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Synthesis and characterization of liquid crystalline epoxy resins

10.31274/etd-180810-1710 ◽

2014 ◽

Author(s):

Yuzhan Li

Keyword(s):

Epoxy Resins ◽

Liquid Crystalline ◽

Synthesis And Characterization ◽

Liquid Crystalline Epoxy

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Research Progress of New Methods for Toughening Epoxy Resin

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.490-495.3598 ◽

2012 ◽

Vol 490-495 ◽

pp. 3598-3602 ◽

Cited By ~ 3

Author(s):

Li Ying Guo ◽

Li Yan Wang ◽

Xin Su

Keyword(s):

Epoxy Resin ◽

Epoxy Resins ◽

Liquid Crystalline ◽

Research Progress ◽

Nano Particle ◽

Technology Research ◽

Future Prospects ◽

Thermoplastic Resin ◽

Rigid Polymer ◽

New Methods

The epoxy is a thermosetting resin, for the lack of toughness after cured ,a brief introduction of epoxy resin toughening technology research progress, detailed in the recent years a number of toughening epoxy resins new methods, including toughened thermoplastic resin, IPN toughening, core-shell particle toughening, thermotropic liquid crystalline toughness, rigid polymer toughening, nano-particle toughening and so on. At last, the paper provided an overview of the progress of epoxy toughening modification technology and its future prospects.

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