摘要
研究了T 403含量对环氧树脂浇注体动静态力学性能和断裂面微观形貌的影响,并考察了有效交联点间分子量与浇注体性能的关系。结果显示,随着T403含量的增加,浇注体拉伸、弯曲强度减小,冲击强度增加,拉伸断裂面形貌粗糙程度增加,表明T403有增韧作用。理论交联点间分子量大于有效交联点间分子量,表明实际交联反应的复杂性。
Epoxy modified by a flexible amine （ T403 ） was prepared by casting molding method. The effects of T403 contents on the static and dynamic properties and fracture surfaces of epoxy casts were studied. The relationships between effective average molecular weight of the network chain （Mc） and the mechanical properties of epoxy casts were investigated. With increasing the content of T403, the tensile and flexible strength decreased, while the impact strength increased, which demonstrated that the toughness of epoxy could be improved effectively by T403. SEM analysis showed that the roughness of fracture surfaces of epoxy casts increased with the addition of T403. The theoretical Me was larger than that of effective Me, which indicated the complexity of curing reaction.
出处
《玻璃钢／复合材料》
CAS
CSCD
2009年第1期38-41,共4页
Fiber Reinforced Plastics/Composites
关键词
柔性胺
环氧树脂
冲击强度
交联密度
flexible amine
epoxy resin
impact strength
crosslinking density
