| 4号航空有机玻璃在大气老化中表面开裂的原因分析 |
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| 引用本文： | 过梅丽,刘贵春,张复盛,刘士昕.4号航空有机玻璃在大气老化中表面开裂的原因分析[J].航空学报,1990,11(6):281-289. |
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| 作者姓名： | 过梅丽 刘贵春 张复盛 刘士昕 |
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| 作者单位： | 北京航空航天大学
(过梅丽，刘贵春，张复盛)，北京航空航天大学(刘士昕) |
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| 摘 要： | 本文用多种测试技术研究了YB-3和YB-4两种航空有机玻璃板材在结构和性能上的差别,以及它们在大气老化中对各种环境因素的敏感性。指出YB-4在大气老化中容易表面开裂的原因是:原始板材的分子量较低,分子量分布过宽;对氧和水较敏感。
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| 关 键 词： | 航空有机玻玻 大气老化 分子量和分子量分布 开裂 |
AN ANALYSIS OF CRACKING OF AVIATION PERSPEX YB-4 DURING WEATHERING |
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| Beijing University of Aeronautics and Astronautics Guo Meili,Liu Guichun,Zhang Fusheng and Liu Shfxin.AN ANALYSIS OF CRACKING OF AVIATION PERSPEX YB-4 DURING WEATHERING[J].Acta Aeronautica et Astronautica Sinica,1990,11(6):281-289. |
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| Authors: | Beijing University of Aeronautics and Astronautics Guo Meili Liu Guichun Zhang Fusheng and Liu Shfxin |
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| Institution: | Beijing University of Aeronautics and Astronautics |
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| Abstract: | The cracking phenomenon of aviation perspex YB-4 during weathering is discussed. Various techniques, such as GPC, TMA (Deformation-temperature) ,IR, ESGA, TG, DMA, stress-solvent crazing, and stress-strain testing have been employed to investigate and compare the structure and properties of perspex YB-4 and YB-3, and their changes in aging. The results show that the most important reasons that lead to relatively, easily cracking of YB-4 during weathering are the following; ( 1 ) The average molecular weight of original YB-4 is lower and its molecular weight distribution is wider. They are the inherent weaknesses of YB-4 in quality. ( 2 ) Oxygen and water, especially the latter, have more serious effects on YB-4 than on YB-3. |
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| Keywords: | aviation perspex weathering molecular weight and molecualr weight distribution cracking |
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