The study on the dispersion and properties of nanoparticle within poly(amide urethane) using supramolecular interaction.
| Autor: | Shih, Che-Hao, 史哲豪 |
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| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 In conventional polymer chemistry, self-assembled polymers are usually formed through covalent linkages including bonds connecting monomer units and attaching functional groups to the polymer backbone. Recently, the supramolecular chemistry is used in different area, and the research mainly discusses the concept of supramolecular chemistry into polymer field. In the supramolecular chemistry, the supramolecular polymer formed by reversible hydrogen bonding is usually researched and this thesis explores dispersion and properties of nanoparticle within poly(amide urethane) using hydrogen bonding. We successfully synthesized a new polyurethane [poly(amide urethane)called PAU] and polyhedral oligomeric silsesquioxane(POSS-U) bearing complementary multiple-hydrogen bonding functional group, and blended them with different ratio. From DSC, we found that POSS-U can recognize into the hard segment of PAU because of the hydrogen bonding interaction. From XRD and SAXS, we can see that they affect the morphology of PAU upon changing the content of POSS-U. From TEM, we can investigate the presence of nanoscale POSS-U aggregation in hard segment of PAU. The improvements of mechanical properties of PAU blending POSS-U were investigated by tensile test. We also used the same concept for dispersing the gold nanoparticles, and we can observe the self-assembled aggregation of gold nanoparticles in hard segment of PAU. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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