New types of liquid crystalline epoxy resins cured by a mesogenic hardening compound
| Autor: | Kenji Tsunashima, Shunichi Osada, Shinichi Yano, Toshihide Inoue |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
chemistry.chemical_classification
Bisphenol A Materials science Polymers and Plastics Mesogen Organic Chemistry Mesophase Polymer Epoxy chemistry.chemical_compound Dicarboxylic acid Differential scanning calorimetry chemistry Chemical engineering Liquid crystal visual_art Materials Chemistry visual_art.visual_art_medium Organic chemistry |
| Zdroj: | Polymer. 37:1925-1932 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/0032-3861(96)87310-1 |
| Popis: | The new epoxy resins, EPD-CAA10 and EPTB-CAA10, were synthesized by reacting stoichiometrically the diepoxides, 4,4′-bis(2,3-epoxypropoxy)bisphenol A (EPB) and 4,4′-bis-2,3-epoxypropoxy)-3,3′,5,5′-tetramethylbiphenol (EPTB), respectively, with a mesogenic hardening compound, 4,4′-bis(ω-carboxydecanoxy)azoxybenzene (CAA10), using tri-n-butylamine as a catalyst. The reaction procedures and the mesogenic phase transitions for the two epoxy resins were studied by the use of infra-red (i.r.), spectroscopy, differential scanning calorimetry (d.s.c.) polarizing microscopy and X-ray diffraction spectroscopy. It was found that both of the differential EPB-CAA10 and EPTB-CAA10 systems had a mesophase which was functionalized by the mesogenic hardening compound; EPB-CAA10 showed a smectic-like mesophase between 70 and 90°C when the polymer was not gelated but had no mesophase when gelated, while EPTB-CAA10 also had a smectic-like mesophase when not gelated, but showed a nematic phase when gelated. |
| Databáze: | OpenAIRE |
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