摘要
Abstract
Bismaleimide (BMI) foams were prepared using azodicarbonamide (AC) as the foaming agent. Micro-morphology of the foams were analyzed by scanning electron microscopy (SEM) and the foaming process and foamed structure such as cell size, cell density, expansion ratio etc. were also studied. The results showed that the modified BMI foam was a kind of closed-cell foam and its cell shape was pentagonal dodecahedron. The foamed structure can be controlled by foaming viscosity, temperature and foaming agent content. When the viscosity of foaming mixture was enhanced, foam density, cell nucleation density (N0) and cell density (Nf) increased, the cell diameter was decreased and become uniformed. The foam density was reduced with increased AC content, and it increased when AC content was over 7%. With the elevated foaming temperature, the cell size increased and the foaming stability became worse.关键词
双马来酰亚胺泡沫/微观形貌/泡孔结构Key words
bismaleimide(BMI) foam/micro-morphology/foam structure分类
通用工业技术
