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 년도별 목차보기 |
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| 발행년도/권호 |
1996 년 / 권호: V.8,no.2,Apr |
| 논문제목1(원어) |
Poly(amic acid) 전구체 용액의 성질 |
| 논문제목2(타언어) |
Property of Poly(amic acid) Precursor Solution |
| 저자(원어) |
Ahn, Young Moo (Dept. of Clothing and Textiles, Hansung Univ., Seoul, Korea) |
| 저자(타언어) |
Ahn, Young Moo (Dept. of Clothing and Textiles, Hansung Univ., Seoul, Korea) |
| 소속(원어) |
Ahn, Young Moo (Dept. of Clothing and Textiles, Hansung Univ., Seoul, Korea) |
| 소속(타언어) |
Ahn, Young Moo (Dept. of Clothing and Textiles, Hansung Univ., Seoul, Korea) |
| 시작/끝
페이지 |
43 ~ 48 총페이지 : 6 |
| 언어(원어) |
Korean |
| 초록 |
Condensation type aromatic polyimides were synthesized in DMF solvent by two step low temperature solution polymerization. By employing monomers as p-phenylene 3diamine and 3 kinds of dianhydrides such as pyromellitic dianhydride, 3,3\\\',4,4\\\'-benzophenone tetracarboxylic dianhydride and trimellitic anhydride chloride, poly(amic acid) precursors were sythesized. These reactions were exothermic and very fast. When synthesized poly(amic acid)s were dissolved in DMF solvent and stood long time, the polymers were hydrolyzed and their degradation reactions were accelerated as the solution concentrations were dilute. Also, when water is added there-to the degradation rates were accelerated 8faster. In addition, in a very dilute solution state, the reduction viscosity is greatly increased to show properties of conventional polyelectrolytes. This also showed properties sensitive to the concentration change as carboxyl groups per unit segment are increased |
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