| 초록 |
Poly (m-phenylene isophthalamide) (PMIA) is one of the most important aromatic polyamides and has been widely used because of its high thermal resistivity combined with excellent mechanical properties. Also PMIA has superior electrical properties. Meta-linked aromatic polyamide was synthesized by solution polymerization of m-phenylene diamine with isophthaloyl chloride in a polar organic solvent such as dimethylacetamide(DMAc). When forming PMIA films, properties of film can be different according to DMAc contens in polymer. Thus, PMIA film evaporates DMAc as solvent at 80℃ for 2 hours. By contrast, we make control group which has been stretching maximum length using dried film. And lastly, stretched film has been heat treated at 200℃ for 10mins. Therefore, through this method, these films are prepared at each concentration. |
