摘要
研究了热塑性树脂聚醚砜(PES)对环氧树脂在液氮温度(LNT)下的断裂韧度、冲击韧性及其他力学性能的影响。结果表明:当PES质量分数大于23%时,PES在环氧树脂中形成连续相或半连续相结构,能有效阻止裂纹扩展,使树脂KⅠC在室温和液氮温度下分别增加247%和77%。在室温下,PES不能使环氧树脂冲击性能提高,但液氮温度下可使冲击韧性增加59%。液氮温度下,环氧树脂的弯曲、压缩和拉伸性能随PES质量分数增加而降低,但相对而言,弯曲和压缩性能受PES的影响较少,而拉伸性能受PES的影响较大。
The fracture toughness （KIC ） , impact strength and other mechanical properties of an epoxy modifled with poly （ether sulphone） （PES） at liquid nitrogen temperature （LNT） are studied. The results show that the KIC of the epoxy can be increased at both RT and LNT by adding PES when PES forms a continuous or semicontinuous phase structure in the epoxy （ PES content~〉23% ）. At PES content of 30%, the KIC of the epoxy increases by 247% at RT and 77% at LNT respectively. At RT, the impact strength of the epoxy can not be increased by adding PES, but at LNT it can be increased by 59%. The mechanical properties at LNT such as flexural, compressive and tensile strengths and modulus reduce with increasing PES content, however, the influence of adding PES on the tensile properties of the epoxy is higher than that on the compressive properties.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2006年第3期33-35,40,共4页
Aerospace Materials & Technology
关键词
超低温
聚醚砜
环氧树脂
相结构
韧性
力学性能
Cryogenic temperature
PES
Epoxy resin
Phase structure
Toughness
Mechanical properties
