玻璃钢/复合材料 ›› 2009, Vol. 209 ›› Issue (1): 38-41.

• 材料研究 • 上一篇    下一篇

柔性胺T403对环氧树脂体系力学性能及交联密度的影响

  

  1. (北京化工大学北京市新型高分子材料制备与加工重点实验室, 北京100029)
  • 出版日期:2009-01-28 发布日期:2009-01-25
  • 作者简介:蔡宏洋(1979-),男,硕士研究生,主要从事环氧树脂及其相关成型工艺的研究。

EFFECTS OF FLEXIBLE AMINE T403 ON THE MECHANIC PROPERTIES
AND CROSSLINKING DENSITY IN EPOXY SYSTEMS

  • Online:2009-01-28 Published:2009-01-25

摘要:

研究了T403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。

关键词: 柔性胺, 环氧树脂, 冲击强度, 交联密度

Abstract:

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 Mc was larger than that of effective Mc, which indicated the complexity of curing reaction.

中图分类号: