China Plastics ›› 2017, Vol. 31 ›› Issue (1): 36-42 .DOI: 10.19491/j.issn.1001-9278.2017.01.007
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Abstract: The quasistatic tensile and compression tests of temperaturecycling treated silicone rubber foam(SRF) and rigid polyurethane foam (RPUF) were conducted to investigate the effect of temperature cycle on their mechanical properties by threedimensional digital speckle dynamic deformation techniques. The results indicated the tensile strength of SRF and highdensity RPUF were influenced by temperature cycle more significantly compared with lowdensity RPUF in the quasistatic tensile process, which led to a remarkable improvement in tensile strength. In the case of SRF, the compressive strength and Young’s modulus were improved remarkably, and the elastic deformation was also increased to some extent. However, its yield phenomenon was not so evident. In the case of lowdensity RPUF, the temperaturecycling treatment led to an improvement in yield stress but resulted in shortening of yield stage and a decrease in plastic deformation. As for the high density RPUF, not only the elastic deformation was improved, but the yield stage was also extended due to the temperaturecycling treatment. However, its loading capability to pressure was reduced in the quasistatic compression process.
Key words: silicone rubber foam, rigid polyurethane foam, effect of temperature cycle, stress distribution
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URL: https://www.plaschina.com.cn/EN/10.19491/j.issn.1001-9278.2017.01.007
https://www.plaschina.com.cn/EN/Y2017/V31/I1/36