| 초록 |
Polyacrylonitrile homopolymer is rarely used as a precursor of carbon fibers due to its high stabilization temperature and low processability. The high cyclization initiation temperature causes thermal damage to surface of PAN during the stabilization process, which raise the degradation of mechanical properties of carbon fibers. To overcome above problems, carboxyl group-containing polysilsesquioxane (PSQ-COOH) which are hybrid organic-inorganic materials are incorporated into PAN to improve the properties such as thermal stability and mechanical strength. During the cyclization of PAN, carboxyl groups of PSQ-COOH can act as an ionic initiator to catalyze the cyclization reaction between nitrile groups at a relative low temperature and enhance the thermal stability. In this study, we designed a series of composites containing poly(acrylonitrile-co-itaconic acid) and PSQ-COOH. Finally, Characteristics of poly(AN-co-IA)/PSQ-COOH composites were analyzed by various analytical tools. |
