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Relationship between free volume and mechanical properties of polyurethane irradiated by gamma rays
Sui, HL; Liu, XY; Zhong, FC; Li, XY; Wang, BY; Ju, X;王宝义
2014
发表期刊JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
卷号300期号:2页码:701-706
摘要Polyurethane was irradiated at various gamma radiation doses up to 1,000 kGy at room temperature in nitrogen. Positron annihilation lifetime spectroscopy, tensile test and dynamic mechanical analysis were used to find the relationship between free volume and mechanical properties. An increase of the free volume fraction in soft segments (SS) and a decrease of the free volume fraction in hard segments (HS) during gamma radiation was observed and analyzed. The results showed that HS in polyurethane had the excellent resistance to gamma radiation, whereas SS had a tendency to degrade. The reason for the decrease of the strain at break and the ultimate tensile strength was analyzed, which showed the changes in the mechanical properties of polyurethane irradiated by gamma rays were mainly determined by the changes of free volume in SS. If the resistance properties of polyurethanes exposed to radiations need to be improved, SS should be paid more attention to.
关键词Polyurethane Free volume Positron annihilation lifetime spectroscopy Gamma ray
学科领域Chemistry; Nuclear Science & Technology
DOI10.1007/s10967-014-3048-7
收录类别SCI
WOS记录号WOS:000334505700035
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225157
专题多学科研究中心
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GB/T 7714
Sui, HL,Liu, XY,Zhong, FC,et al. Relationship between free volume and mechanical properties of polyurethane irradiated by gamma rays[J]. JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY,2014,300(2):701-706.
APA Sui, HL,Liu, XY,Zhong, FC,Li, XY,Wang, BY,&Ju, X;王宝义.(2014).Relationship between free volume and mechanical properties of polyurethane irradiated by gamma rays.JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY,300(2),701-706.
MLA Sui, HL,et al."Relationship between free volume and mechanical properties of polyurethane irradiated by gamma rays".JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 300.2(2014):701-706.
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