| 세션명 | 대학원생 구두발표 (II) |
|---|---|
| 발표장 | 제10회장 (105) |
| 논문코드 | 1O10-10 |
| 발표일 | 2018-10-11 |
| 발표시간 | 16:05-16:20 |
| 논문제목 | Enhanced Mechanical Properties of Polymer Nanocomposites Using Dopamine-Modified Polymers at Nanoparticle Surfaces in Very Low Molecular Weight Polymers |
| 발표자 | 권나경 |
| 발표자 소속 | 울산과학기술원 |
| 저자 | 권나경, 김소연† |
| 소속 | 울산과학기술원 |
| 논문초록 | While incorporation of nanoparticles (nanofillers) into polymer matrices is well-known as one of the methods to improve the mechanical properties of polymers, it is still challenged to enhance mechanical properties in very low molecular weight polymers like as those in high molecular weight. Here, we report the dramatically enhanced mechanical properties of very low and unentangled poly(ethylene glycol) (PEG) can be obtained by employing the dopamine-modified PEG (DOPA-mPEG) brush polymers as a physical grafting agent on silica nanoparticle surfaces. We found DOPA-mPEG grafting on silica surface can i) increase effective particle volume of particles in PEG matrix, ii) form suprastructures with particle aggregations, and ii) enhance the shear modulus of PEG by a factor of 105 at an appropriate surface grafting density. Extensive small-angle X-ray scattering, and oscillatory shear experiments were performed to investigate the detailed microstructure and rheological properties. |
THE POLYMER SOCIETY OF KOREA