Gamma radiation induced effects of compressed silicone foam
Gamma radiation induced effects of compressed silicone foam
复制标题
压缩硅酮泡沫的伽马辐射诱导效应
DOI：
10.1016/j.polymdegradstab.2015.02.007
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发表时间：
2015-04-01
影响因子：
5.9
通讯作者：
Wu, Wen-Hao
中科院分区：
文献类型：
--
作者：
Chen, Hong-Bing;Liu, Bo;Wu, Wen-Hao
本研究研究了不同吸收剂量和温度水平下伽玛辐射对机械压缩二氧化硅增强硅酮泡沫的影响。结果表明，辐照温度对材料形貌和性能没有明显影响。 SEM 表征显示，随着辐射剂量的增加，微观结构会塌陷或变形，这与样品厚度的减少一致。辐照样品的拉伸强度随着剂量水平显着增加，最终随着极端暴露而略有下降。对于在 45 摄氏度下暴露于 500 kGy 剂量的样品，断裂伸长率随着辐射单调下降，从控制值 136.1 +/- 4.0% 降至 27.0 +/- 2.0%。DSC 研究显示剂量依赖性结晶现象和熔化行为。随着吸收剂量的增加，可溶性物质的分子量略有下降。性质和形态的变化可能归因于辐照诱导的交联和辐射分解，并提出了可能的机制。 (C) 2015 Elsevier Ltd. 保留所有权利。
The effects of gamma radiation on mechanically-compressed, silica-reinforced silicone foam at various levels of absorbed dose and temperature were investigated in this study. The results show that irradiation temperature does not have an obvious influence upon the material morphology and properties. SEM characterization shows collapsed or deformed microstructures with increasing doses of irradiation, consistent with decreased sample thicknesses. The tensile strengths of irradiated samples increase significantly with dose level, eventually decreasing slightly with extreme exposure. Elongation at break decreases monotonically with irradiation, from a control value of 136.1 +/- 4.0% to 27.0 +/- 2.0% for samples exposed with a dose of 500 kGy at 45 degrees C. DSC studies show dose dependent crystallization phenomena and melting behaviors. The molecular weight of soluble materials decrease slightly with increasing absorbed doses. The property and morphology changes are probably attributed to the irradiation-induced crosslinking and radiolysis, the likely mechanisms for which are proposed. (C) 2015 Elsevier Ltd. All rights reserved.