摘要
采用微粉化处理过的双氰胺固化环氧树脂,自制FH-1作为促进剂制备出一种可中温固化、具有一定潜伏性的环氧树脂固化体系,通过偏光显微镜对比微粉化前后双氰胺在环氧中的分散状态。结果表明,微粉化双氰胺在环氧树脂中均匀分散且不会沉淀,贮存期可达3个月以上。自制FH-1促进剂使得固化反应温度下降40～50℃。浇注体冲击强度为56.3kJ/m2,拉伸强度为91.4MPa,断裂伸长率为4.6%,固化体系具有较高的韧性。单向玻纤增强复合材料湿态保持率在70%以上,树脂与纤维浸润性优异。
A latent and medium-temperature cured epoxy resin system was prepared from epoxy/ micronized-dicyandiamide/FH-1. Polarizing microscope revealed that the micronized dicyandiamide could be well-distributed and kept stable in epoxy. The initial curing temperature was decreased about 40～ 50℃ compared with that based on non-micronized-dicyandiamide. The optimal mechanical properties of the resin were flexural strength 56.3 kJ/m^2, tensile strength 91.4 MPa, elongation at break 4. 6%. For the composites reinforced with fiber-glass, the retention rate of mechanical properties at wetting condition was over 70%.
出处
《中国塑料》
CAS
CSCD
北大核心
2013年第2期30-33,共4页
China Plastics
关键词
微粉化双氰胺
预浸料
韧性
湿热性能
micronized dicyandiamide
prepreg
toughness
hot-wet mechanical property
