摘要
用多种有机溶剂测定了三号航空有机玻璃（简称ＹＢ－３，化学成分主要是ＰＭＭＡ的应力—溶剂银纹临界应力σ_ｃ。发现σ_ｃ基本上随溶剂与ＰＭＭＡ溶度参数之差的增加而增加。同时也研究了吸水，紫外光辐照等单一因素的作用以及吸水／紫外光辐照／应力—溶剂银纹的循环作用。认为水主要起增塑作用，紫外光主要引起分子主链断裂，两者都导致σ_ｃ下降；而多因素的循环作用对ＹＢ－３的破坏作用远远大于任何单一因素的作用。后者是特别值得引起注意的。
The critical stress of stress-solvent,σc, of an aviation organic glass, YB3(PMMA), with various organic solvents was measured. Results show that σc increases essentially with the increase of the solubility parameter difference between solvent and PMMA. The effects of water sorption UV radiation, and their combination or cycling on σc were also studied. It has been found that the water sorbed acts as a plasticizer, UV radiation mainly leads to molecular chain breaking, and the cycling of water sorption UV radiation, stress-solvent crazing has a far severer effect on the failure of the organic glass than any single environmen tal factor, which is particularly worth being noted.
出处
《材料科学与工程》
CSCD
1995年第4期38-42,共5页
Materials Science and Engineering
基金
国家自然科学基金
关键词
有机玻璃
航空用
环境因素
应力
溶剂银纹
aviation organic glass, stress-solvent, crazing, critical stress,water sorption, UV radiation, cycling, environmental cracking
