Liquid crystalline twin epoxy monomers based on azomethine mesogen: synthesis and curing with aromatic diamines

Choi, E‐Joon; Ahn, Hung-Kun; Lee, Jong Keun; Jin, Jung‐Il

doi:10.1016/s0032-3861(00)00111-7

Cited by 61 publications

(43 citation statements)

References 21 publications

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“…The other two peaks can be attributed to a presence of at least one LC phase. [33][34][35][36] We believe that the second and the third endothermic peak of PAMEs are related to the melting (crystal-liquid T m1 ) and isotropization transitions (T m2 ), respectively, (see Figure 3 and Table 2). [34] The DCS thermograms of PAME-I and PAME-III polymers have an additional exothermic peak above the glass transition temperature (presumably crystallization transition T c1 ) indicating formation of ordered structures due to a cold crystallization process above T g (Figure 3).…”

Section: Synthesis Of Pame-vimentioning

confidence: 99%

Synthesis and characterization of fluorinated poly(azomethine ether)s from new core-fluorinated azomethine-containing monomers

Kobzar

Ткаченко

Bliznyuk

et al. 2015

Designed Monomers and Polymers

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In this work, we describe the design and synthesis of novel core-fluorinated Schiff base monomers and conjugated polymers based on them. The new fully aromatic highly fluorinated poly(azomethine ether)s (PAMEs) were prepared by polycondensation of core-fluorinated azomethine-containing compounds. The structure of the monomers and polymers were confirmed by FTIR, F NMR spectroscopic analysis. The influence of synthesis condition on the properties of PAME compounds was investigated. Application of polarization microscopy with a temperature control thermal stage revealed thermotropic liquid crystalline (LC) behavior in the synthesized materials. Transition temperatures and a range of the existence of the LC phase were studied by a combination of the optical microscopy and DSC analysis. According to the TGA analysis, all the synthesized PAMEs show high thermal stability and thus offer a wide range of thermal processibility (up to 410-477 °C), which makes them prospective materials for many modern applications.

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Section: Synthesis Of Pame-vimentioning

confidence: 99%

Synthesis and characterization of fluorinated poly(azomethine ether)s from new core-fluorinated azomethine-containing monomers

Kobzar

Ткаченко

Bliznyuk

et al. 2015

Designed Monomers and Polymers

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“…The length of the mesogenic epoxy compound plays the main function in the appearance of a mesophase, [7], [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of New Liquid Crystals as Curing Agents for Epoxy Resins

Anber¹

2016

AJAC

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Abstract:A novel class liquid crystalline epoxy resins was synthesized by reacting the diglycidyl ether of bisphenol A (DGEBA) with three new liquid crystal diols, 4,4`-di-N-[(6-hydroxy hexoxy)-3-pyridyl methylidene ]amino phenyl benzamide, 4,4`-di-N-[(6-hydroxy butoxy)-3-pyridyl methylidene]amino phenyl benzamide, and 4,4`-di-N-[(6-hydroxy etoxy)-3-pyridyl methylidene]amino phenyl benzamide, contain azomethine groups. The new liquid crystals were characterized by Fourier transformed infra-red (FT-IR) and nuclear magnetic resonance (NMR) spectroscopy. Flexibility and adhesion properties were then investigated for the cured resins based on new azomethine mesogenic diols. The cured polymers were found to exhibit high flexibility and good adhesion properties compared to ordinary amine systems.

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“…With development of the science and technology of liquid crystals, an increasing number of new mesogens have been prepared and studied. [1][2][3][4][5] Hemiphasmidic liquid crystals, or hemiphasmids, are known as a kind of combination of a half-disclike and a rodlike moiety. 6 Because hemiphasmids and related structures can describe the borderline between rigid and flexible, rodlike and disclike, much attention has been paid to their synthesis, properties, and application.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of side‐chain liquid‐crystalline polysiloxanes containing hemiphasmidic mesogens

Yao

Zhang

Sun

et al. 2004

J of Applied Polymer Sci

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Liquid crystalline twin epoxy monomers based on azomethine mesogen: synthesis and curing with aromatic diamines

Cited by 61 publications

References 21 publications

Synthesis and characterization of fluorinated poly(azomethine ether)s from new core-fluorinated azomethine-containing monomers

Synthesis and characterization of fluorinated poly(azomethine ether)s from new core-fluorinated azomethine-containing monomers

Synthesis and Properties of New Liquid Crystals as Curing Agents for Epoxy Resins

Synthesis and properties of side‐chain liquid‐crystalline polysiloxanes containing hemiphasmidic mesogens

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