Synthesis and Characterization of Conductive Oligoanilines–Graphene / Ag nanowire -Polyurethane Composite Materials
| Autor: | Tzu-Chi Wang, 王孜齊 |
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| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 The study is based on tetraaniline synthesized by using aniline dimer as monomer and FeCl3 as oxidant. However, tetraaniline are commonly classified as rigid, brittle, and difficult to process. And the experiment uses the polyurethane to improve its disadvantages. The prepolymer with -NCO group was obtained by the reaction of Poly-(caprolactone)-diol (PCL) as soft segments and 4,4-diphenylmethane diisocyanate (MDI) as hard segments which were with the molecular weight 2000 and 250 respectively. Then the tetraaniline could connect end to end in two shorts of the prepolymer with -NCO group to form copolymer. The copolymer could be blended with Ag nanowire or graphene as addition agent while dissolve in DMF. The structures of nanocomposites were investigated by FTIR spectra and MS. The analysis of microstructure was by SEM. The physical properties of nanocomposites were investigated by DMA, Four-point probe, and XRD. The experimental results of Ag nanowire content 3% in the copolymer, and the best conductivity is 4.60*10-2S/cm. However, the stretched molecular chains in nanocomposites are orientation as the increase in conductivity. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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