| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.342 |
| 발표분야 | 고분자 합성 |
| 제목 | Synthesis and Characterization of Poly(urethane-imide) for Fuel Cell Membrane |
| 초록 | Poly(urethane-imide)s were prepared by reactino between hydroxy endgroup containing sulfonated polyimide (PI) by solution imidizatino and -NCO end-capped polyurethane (PU). Poly(amic acid) was prepared from 2,2'-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (HFBAPP), 2,2'-bis(3-amino-4-hydroxyphenyl)hexafluoropropane diamine (AHHFP), 4,4'-Diamino Diphenyl 2,2'-Disulfonic Acid (BDSA), and 1, 4, 5, 8-naphathalene tetracarboxylic diahydrides (NTDA). The PU prepolymers were prepared by the reaction of polyethylenge glycol, tolylene 2,4-diisocyanate which has -NCO terminated groups. The effect of PU content on the ion conductivity, Ion exchange capacity, thermal property, morphology and mechanical properties was studied. The poly(urethane-imide)s were characterized by FT-IR, Ion conductivity. Thin Film Stress Analyzer (TFSA), X-ray diffractometer, TGA, Ion Exchange Capacity, hydrolytic stability, Water sorption, and solubility. The ion conductivity of poly(urethane-imide)s was higher than that of normal sulfonated polyimide. Especially, poly(urethane-imide) containing ethylege groups in urethane showed the bese results than other poly(urethane-imide)s. High hydorlytic stability and good soubility were achieved by higher PU content. Compared to typical polyurethane, these polymers exhibited better thermal stabilities due to the presence of the imide groups. The modulus and hardness by Nano-indentation decreased with an increase in the flexible PU. Finally the ion conductivity of poly(urethane-imide)s was strongly affected by the morphological structure, chain mobility, and modulus. The best candidate for the intended application was calculated. This work was supported by the Ministry of Science of Thchnology of Korea torough the National Research Laboratory Program and Centre for Electronic Packaging Materials of Korea Science and Engineering foundation |
| 저자 | 조태수, 장원봉, 신대용, 설용건, 한학수 |
| 소속 | 연세대 |
| 키워드 | soluble polyimide; polyurethane; poly(urethane-imide); dielectric constant; residual stress; morphology; modulus |
