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| Titel: |
Synthesis of LC p-Biphenyl di{4-[2-(2,3-epoxypropyl)ethoxy] benzoate} and Curing Kinetics with Succinic Anhydride |
| Auteur: |
Chen, Jing Gao, Jun-gang Liu, Yun Luo, Qingjun Liu, Guodong |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 57 (2008) nr. 2 pagina's 154-164 |
| Jaar: |
2008-02 |
| Inhoud: |
A liquid crystalline (LC) diepoxide of p-biphenyl di{4-[2-(2,3-epoxypropyl)ethoxy] benzoate} (p-BPEPEB) was synthesized from allyl 2-hydroxyethyl ether, 4-hydroxy ethyl benzoate, 4,4-biphenol and m-chloroperoxybenzoic acid (MCPBA). Its structure was characterized by FTIR, 1HNMR. The thermal properties and liquid crystalline behavior were investigated by using DSC, POM and XRD. The results show that the p-BPEPEB has a smectic liquid crystalline structure, and the melting point is 155°C. The curing kinetics of p-BPEPEB with succinic anhydride was investigated by nonisothermal DSC method. The results show that the cured system's initial temperature Ti is 90.8°C; peak temperature Tp is 128.4°C and finishing temperature Tf is 144.7°C. The apparent activation energy Ea is 213.69 KJ/mol, and with the increase of conversion rate the value reduces. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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