| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Structure and Rheological Properties of Polymer Nanocomposites with Bimodal Silica Nanoparticles |
| 초록 |
Bimodal particle dispersions have been of particular interest in colloidal science as they can exhibit unique packing structures increasing the maximum packing density. Though the concept of bimodal particles can be applied to polymer nanocomposites (PNCs), there have been no systematic studies on bimodal PNCs. The bimodal PNCs can be distinguished from bimodal colloidal systems by the presence of an interfacial layer created by polymer adsorption. In this work, we investigate the structural and rheological properties of bimodal polymer nanocomposites composed of poly(ethylene glycol)/silica nanoparticles. While the size ratio of big/small nanoparticles is about 3, the volume ratio between big/small particles and polymer molecular weight (MW) are varied. We report that the modulus of PNCs increases dramatically at a specific volume ratio of bimodal particles and discuss how it can be related to the interfacial layer-induced packing enhancement and network formation. |
| 저자 |
조성민, 김소연
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| 소속 |
서울대 |
| 키워드 |
polymer nanocomposite; bimodal system; rheology; interfacial layer
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| E-Mail |
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