| 학회 | 한국고분자학회 |
| 학술대회 | 2002년 가을 (10/11 ~ 10/12, 군산대학교) |
| 권호 | 27권 2호, p.334 |
| 발표분야 | 분자전자 부문위원회 |
| 제목 | Confinement Effect of Nano-hybrids Thin Films on the Dielectric Relaxation Characteristics |
| 초록 | The dielectric properties of nano-hybrids composed of methylsilsesquioxane(MSSQ) and 8-arm star shaped polymer(porogen) have been investigated at different temperature and frequency by dielectric relaxation measurement(HP 4194A LCR meter). The parameters monitored by dielectric relaxation method are dielectric constants for the alignment of molecular dipoles and loss factor(tan δ) for the energy needed to align the dipoles. Porogen contents in nano-hybrids varied up to 30 wt%. The dielectric properties of the pure porogen and MSSQ/porogen hybrids were studied frequency ranged from 10 kHz to 1MHz at temperature from -200 to 200 ℃. In this study, it was found that the confinement by fixed wall in nano-sized pores should disturb molecular motions, which shifted glass transition temperature to higher region. The change of glass transition temperature depends on end group functionality in both MSSQ and porogen, and size distribution of porogen. |
| 저자 | 박재만1, 민성규2, 송기태, 송민규, 진문영*, 이희우 |
| 소속 | 1서강대, 2*한국화학(연) |
| 키워드 | Dielectric relaxation; hybrids thin films; MSSQ; porogen |
