摘要
以偶氮二甲酰胺（AC）为发泡剂,采用预聚、发泡的两步法制备双马来酰亚胺泡沫,研究AC含量对泡沫泡孔结构、密度、尺寸稳定性温度和压缩性能的影响。结果表明：可通过发泡剂用量的改变实现泡沫密度在60-280kg/m3范围内调整,发泡剂用量对泡孔尺寸及其均匀性影响较小。随发泡剂用量降低,尺寸稳定性温度和压缩性能提高,当泡沫密度为280kg/m3时,尺寸稳定性温度可达220℃,压缩强度和模量分别为4.8MPa和200MPa,满足结构泡沫的耐温性能和力学性能要求。
Bismaleimide foam using azodicarbonamide （AC） as the foaming agent was prepared through prepolymerization and foaming. The influence of AC on bubble structure, density, high-temperature dimensional stability temperature（HDT） as well as compressive properties of the bismaleimide（BMI） foam was investigated. The results show that foam density could be adjusted from 60kg/m3 to 280kg/m3 by content of AC, meanwhile, AC dosage has little influence on cell size and its distribution. As the content of AC decreases, the HDT and compressive strength increase. When the foam density is 280kg/m3 , the HDT is 220℃, compressive strength and modulus are 4. 8MPa and 200MPa respectively, meeting the require- ments of the high-temperature and mechanical properties of structural foams.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2016年第5期42-46,共5页
Journal of Materials Engineering
关键词
发泡剂含量
双马来酰亚胺泡沫
泡孔结构
尺寸稳定性温度
压缩性能
content of AC
bismaleimide foam
bubble structure
dimensional stability temperature
compressive property
