| 학회 | 한국고분자학회 |
| 학술대회 | 2002년 가을 (10/11 ~ 10/12, 군산대학교) |
| 권호 | 27권 2호, p.245 |
| 발표분야 | 고분자 합성 |
| 제목 | Preparation of polyimide nanofoam from PPG-grafted polyimide precursors |
| 초록 | Polyimide nanofoams have been developed for use in dielectric layers in microelectronics. The foams generated were generally prepared from phase-separated block copolymers with the majority phase comprised of polyimide and the minor phase consisting of a thermally labile block. Films of the copolymers are cast and then heated to effect solvent removal and annealing, resulting in nano-phase separation of the two dissimilar blocks. The labile blocks are selectively removed via thermal treatments, leaving pores having the size and shape of the original copolymer morphology. In this presentation, the first polyimide nanofoam prepared from a labile block-grafted polyimide precursors will be reported. Polyimide synthesized from pyromellitic dianhydride (PMDA) and 4,4’-oxydianiline (ODA) was used as the matrix material for the generation of nanofoams, and specially functionalized poly(propylene glycol) oligomers were used as the thermally labile constituent. The synthesis and characterization of the grafted polyimide precursors, poly(amic acid-g-amic ester) were performed and the process for obtaining nanofoams was optimized. The foams were characterized by a variety of techniques including nuclear magnetic resonance spectrometer (1H-NMR), infrared spectrometer (IR), differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). |
| 저자 | 도진석1, 한상협*2, 나창운*, 이명훈* |
| 소속 | 1전북대, 2*전북대 |
| 키워드 | polyimide; nanofoam; poly(propylene glycol) |
