Synthesis and Characterization of Novel Liquid Crystalline Epoxy Resin with Low Melting Point |
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| Authors: | Hisanao Yamamoto Akira Fujita Miyuki Harada Mitsukazu Ochi |
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| Institution: | 1. Faculty of Chemistry, Materials and Bioengineering , Kansai University , Suita-shi , Osaka , Japan;2. Asahi-Kasei E-materials Co., Ltd. , Fuji-shi , Shizuoka , Japan;3. Faculty of Chemistry, Materials and Bioengineering , Kansai University , Suita-shi , Osaka , Japan |
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| Abstract: | A liquid crystalline epoxy resin (LCE) having α-methylstilbene as a mesogenic unit and an ethylene-oxy unit as a spacer (DGE(C2-MS-C2)) was synthesized and characterized. DGE (C2-MS-C2) has a lower melting point (MP) compared to the diglycidylether of 4,4′-dihydroxy-α-methylstilbene (DGEDHMS). The curing of DGE (C2-MS-C2) with diaminodiphenylethane (DDEt) in a mesophase generated a liquid crystalline (LC) network, which have a more highly layered structure than DGEDHMS. The LC network showed extensively large fracture energy on a tensile test. Introducing spacers outside the mesogen unit promotes the mesogen unit to form a highly ordered structure, which enhances the versatility of LC epoxy resins. |
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| Keywords: | Fracture toughness layered structure LC thermosets liquid crystalline epoxy resin |
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