Ling, Tai Shyan (2010) The synthesis and characterization of liquid crystalline polymer with alkyl chains. Universiti Malaysia Sabah. (Unpublished)
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Abstract
A rod-shaped monomer containing azobenzene based mesogen moieties with allyl as terminal group was synthesized. Ethyl 4-(4-allytoxylphenylazo)benzoate was synthesized from Ethyl 4-(4-hydroxyphenyl(azo)benzoate) using Williamson ether synthesis by allyl bromide. It is polymerized using AlBIN as Initiator, leads to formation of a final compound, which was Poly[Ethyl 4-(4-allytoxylphenylazo)benzoate]. Fourier-Transform-IR (FT-IR) was used to Identify the molecular structure of the compounds. FT-IR spectrums show the presence of aliphatic alkyl chains, azobenzene moieties, and carboxyl group In the final compound. UV spectromebic analysis shows the presence of azo linkage In PoIy[Ethyl 4-(4-allytoxylphenylazo)benzoate]. The phase transition temperatures and enthalpies were evaluated by thermal analysis of differential scanning calorimetry (DSC). From the thermogram, it shows endothermic peak at 124.44 °C and exothermic peak at 115.76°C.
| Item Type: | Academic Exercise |
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| Keyword: | azobenzene, allyl bromide, AIBIN, Fourier-Transform-IR (FT-IR), differential scanning calorimetry (DSC), rod-shaped |
| Subjects: | T Technology > TP Chemical technology |
| Department: | SCHOOL > School of Science and Technology |
| Depositing User: | ADMIN ADMIN |
| Date Deposited: | 04 Sep 2015 16:42 |
| Last Modified: | 27 Oct 2017 10:23 |
| URI: | https://eprints.ums.edu.my/id/eprint/11736 |
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