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

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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Study on Curing Mechanism of Azo-Containing Twin Liquid Crystalline Epoxy Resins with Anhydride

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.702.119 ◽

2013 ◽

Vol 702 ◽

pp. 119-122

Author(s):

Teng Fei Shen ◽

Fa Chao Wu ◽

Ying Juan Sun

Keyword(s):

Differential Scanning Calorimetry ◽

Epoxy Resins ◽

Liquid Crystalline ◽

Curing Kinetics ◽

Scanning Calorimetry ◽

Curing Reaction ◽

Azo Group ◽

Liquid Crystalline Epoxy ◽

Curing Mechanism ◽

Kinetics Of

A series of novel azo-containing twin liquid crystalline (LC) epoxy monomers were cured with anhydrides without extra catalyst and the curing kinetics was investigated by non-isothermal differential scanning calorimetry (DSC) technique. The effect of Azo group on the Curing Kinetics of Epoxy/anhydride System was investigated and the result showed that Azo group served as a catalyst to accelerate the curing reaction. The curing mechanism was confirmed by the UV-Vis spectrum.

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Modeling of Curing Reaction Kinetics in Liquid-Crystalline Epoxy Resins

Industrial & Engineering Chemistry Research ◽

10.1021/ie9606810 ◽

1997 ◽

Vol 36 (8) ◽

pp. 2976-2983 ◽

Cited By ~ 30

Author(s):

Giovanni Micco ◽

Marta Giamberini ◽

Eugenio Amendola ◽

Cosimo Carfagna ◽

Gianni Astarita

Keyword(s):

Reaction Kinetics ◽

Epoxy Resins ◽

Liquid Crystalline ◽

Curing Reaction ◽

Liquid Crystalline Epoxy

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Synthesis and characterization of liquid crystalline epoxy resins to study the effect of mesogenic length on the physical properties

Journal of Polymer Research ◽

10.1007/s10965-020-02370-4 ◽

2021 ◽

Vol 28 (2) ◽

Author(s):

Yi-Sheng Lin ◽

Steve Lien-Chung Hsu ◽

Tsung-Han Ho ◽

Li-Cheng Jheng ◽

Yu-Hsiang Hsiao

Keyword(s):

Physical Properties ◽

Epoxy Resins ◽

Liquid Crystalline ◽

Synthesis And Characterization ◽

Liquid Crystalline Epoxy

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Advances in Liquid Crystalline Epoxy Resins for High Thermal Conductivity

Polymers ◽

10.3390/polym13081302 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1302

Author(s):

Younggi Hong ◽

Munju Goh

Keyword(s):

Thermal Conductivity ◽

Network Structure ◽

Epoxy Resins ◽

Liquid Crystalline ◽

Random Network ◽

Three Dimensional ◽

Heat Insulator ◽

Liquid Crystalline Epoxy ◽

Thermally Conductive ◽

Substantial Interest

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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