| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Enhancement of mechanical properties of polyimide film by simple microwave irradiation |
| 초록 |
Polyimide films have been prepared by conventional thermal imidization of poly(amic acid)s (PAAs). However, we found that the mechanical properties of polyimide films can be significantly enhanced by microwave (MW) irradiation of PAAs and thermal imidization. The optimum MW irradiation conditions were determined to be 240W for 2 min. MW-treated pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA)-based polyimide (PO) films showed 27% higher tensile strength and 32% higher elongation at break than the control PO film, which was prepared without MW irradiation. The improved tensile strength can be attributed to the increase in molecular weight of the polyimides. This hypothesis was supported by a model study showing that the reaction of phthalic acid with aniline occurs by MW irradiation. The process requires relatively low MW power and can be performed in a very short amount of time and no need of incorporation of inorganic materials. |
| 저자 |
최주영, 진승원, 김동민, 송인호, 남경남, 박형주, 정찬문
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| 소속 |
연세대 |
| 키워드 |
polyimide film; microwave; molecular weight; tensile strength; film flexibility; end group reaction
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| E-Mail |
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