| 세션명 | Korea-Australia Joint Symposium: Next Generation Polymer Science and Technology (English) |
|---|---|
| 발표장 | 삼다홀B |
| 논문코드 | 1L2-3 |
| 발표일 | 2019-10-10 |
| 발표시간 | 14:20-14:45 |
| 논문제목 | The Long and the Short of Polymer Grafting - Exploring the Limits and Quantification of the ‘Grafting-to’ Approach |
| 발표자 | Leonie Barner |
| 발표자 소속 | School of Chemistry, Physics and Mechanical Engineering, Institute for Future Environments, Queensland University of Technology (QUT) |
| 저자 | Leonie Barner†, Lukas Michalek, Kai Mundsinger, Christopher Barner-Kowollik |
| 소속 | School of Chemistry, Physics and Mechanical Engineering, Institute for Future Environments, Queensland University of Technology (QUT) |
| 논문초록 | Polymers covalently attached to surfaces can exhibit different confirmations, depending on the distance amongst tethering sites which is described by the grafting density σ. By functionalisation of a quartz crystal microbalance sensor via the ‘grafting-to’ approach of PMMA, a grafting density determination was established demonstrating that grafting a distribution of polymer chains onto an interface critically affects the shape of the distribution, with shorter chains being preferentially attached. The preferred surface attachment of shorter chains was underpinned by single-molecule force spectroscopy measurements, establishing the preferential grafting factor, κ, which allows to predict the molar mass distribution of polymers on the surfaces compared to the initial distribution in solution. Application of poor solvents is proven to be beneficial for the ‘grafting-to’ approach. The shorter polymer chains are preferentially grafted onto the surface, leading to a distortion effect between the molar mass distribution in solution and on surfaces which effect is significantly higher for better solvent quality than for poorer solvent quality. |
THE POLYMER SOCIETY OF KOREA