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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1990, Vol. 11 ›› Issue (6): 281-289.
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Guo Meili, Liu Guichun, Zhang Fusheng, Liu Shfxin
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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.
Key words: aviation perspex, weathering, molecular weight and molecualr weight dis-tribution cracking
Guo Meili;Liu Guichun;Zhang Fusheng;Liu Shfxin. AN ANALYSIS OF CRACKING OF AVIATION PERSPEX YB-4 DURING WEATHERING[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1990, 11(6): 281-289.
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