| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.78 |
| 발표분야 | 산학협동 세션 (폴리이미드) |
| 제목 | Polyimide Based Nanohybrids |
| 초록 | Polyimides(PIs) have numerous applications in the electronic industries and their property improvements are vital with regard to such applications. The combination of nanoscale inorganic components with the PIs has a high potential for the future applications and therefore has attracted a lot of attention during the last years. Combining PI with silica particles from alkoxysilanes using sol-gel chemistry often led to inhomogeneously distributed micro-size silica domains in the PI matrix. This led to brittle composites with microscopic cracks. This talk will focus on our recent works on the enhancement of interfacial interaction in silica or silsesquioxane based PI nanohybrids. We prepared PI/silica or PI/silsesquioxane nanohybrids from 3,3/,4,4/-biphenyltetracarboxylic dianhydride (BPDA)-p-phenylene diamine (PDA) or BPDA-4,4/-oxydianiline (ODA) polyamic acid (PAA), and tetraethoxysilane(TEOS) and/or triethoxyvinylsilane (VSSQ) by thermal imidization and sol-gel reaction. We measured microstructure and thermal, dynamic mechanical, and dielectric properties of those nanohybrids. We found that microstructure and properties of PI/silica or PI/silsesquioxane nanohybrids are dependent on the interfacial interaction between PI and silica or silsesquioxane and the interfacial interaction is different depending on whether the amine used for the synthesis of PI is PDA or ODA. For instance, dielectric constants of the BPDA-PDA PI/PVSSQ hybrid films were monotonously decreased with VSSQ contents, whereas those of BPDA-ODA PI/PVSSQ hybrid films showed a minimum at a certain VSSQ contents. Moreover, it should be also noted that the addition of titania plays a role in reducing the silica particle size in the PI based nanohybrids. |
| 저자 | 하창식 |
| 소속 | 부산대 |
| 키워드 | polyimide; nanohybrid; silica; silsesquioxane |
