서울대학교 · 공학
Jae Ryoun Youn 교수의 연구실은 고분자 복합재료 및 나노복합소재의 제조 및 응용을 중심으로 연구를 진행하고 있습니다. 특히 마이크로셀룰라 포아의 형성 메커니즘, 나노입자 분산을 통한 고분자 복합소재의 유동성 및 기계적 성질 향상, 그래핀 기반 다공성 소재의 기계적 안정성 제고 등에 초점을 맞추고 있습니다. 또한, 고분자 반응 동역학과 거품 성장 메커니즘의 이론적 모델링을 통해 실용적 응용에 기여하는 기초 연구를 수행하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Abstract A new method of producing microcellular polyester composites is developed. The microcellular foam which is produced by supersaturating the polyester resin with nitrogen is cured by dielectric heating. The lightweight composite contains about 10 μm size bubbles. By substituting the microcells for the particulate fillers of the conventional composites, the weight of the composite is reduced by 30 to 40 percent. A theoretical analysis based on classical nucleation theory is applied to pred
Abstract Melt rheology and processability of exfoliated polypropylene (PP)/layered silicate nanocomposites were investigated. The nanocomposites were prepared by melt compounding process in the presence or absence of a PP‐based maleic anhydride compatibilizer. PP/layered silicate nanocomposites showed typical rheological properties of exfoliated nanocomposites such as nonterminal solid‐like plateau behavior at low frequency region in oscillatory shear flow, higher steady shear viscosity at low s
Abstract Processing of microcellular foam was studied for polyurethane. Assuming that the bubble growth is controlled by diffusion, theoretical prediction was carried out numerically to understand the bubble growth mechanism in the cavity during mold filling. Final bubble sizes were also predicted by considering the gelation time and the diffusion boundary. Viscosity change of the mixed polyurethane resin during polymerization reaction was predicted by considering reaction kinetics. The gelation
