| γ辐照接枝聚四氟乙烯特性和自由体积的关系 |
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| 引用本文： | 冯嘉祯,刘宝钧,杨文英,李莹.γ辐照接枝聚四氟乙烯特性和自由体积的关系[J].原子能科学技术,1999,33(3):211-218. |
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| 作者姓名： | 冯嘉祯 刘宝钧 杨文英 李莹 |
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| 作者单位： | 1. 天津师范大学物理系,300074
2. 天津市技术物理所,300080 |
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| 摘 要： | 用正电子湮没技术研究在聚四氟乙烯照接技过程中的自由体积与正电子湮没寿命谱的关系。吸收剂量，吸收剂量率以及辐照环境等对接枝率有明显影响。而正电子湮没寿命可十分敏感地反映接枝率的变化。接技率的变化规律可用自由体积模型解释。用扫描电子显微镜对样品进行了观察比较。
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| 关 键 词： | 正电子湮没 辐照技术 自由体积 聚四氟乙烯 |
THE RELATION BETWEEN FREE VOLUME AND THE CHARACTER OF γ-IRRADIATED GRAFT IN PTFE |
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| Feng Jiazhen,Liu Baojun,Yang Wenying,Li Ying.THE RELATION BETWEEN FREE VOLUME AND THE CHARACTER OF γ-IRRADIATED GRAFT IN PTFE[J].Atomic Energy Science and Technology,1999,33(3):211-218. |
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| Authors: | Feng Jiazhen Liu Baojun Yang Wenying Li Ying |
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| Abstract: | The positron annihilation technique was applied to study the relation between relative free volume and irradiated graft for PTFE. The results indicate that the relative free volume responds very sensitively to the graft rate. The graft rate can be changed with the variations of absorbed dose, absorbed dose rate and irradiation environment. These rules are discussed in terms of the free volume model and are in agreement with the results from electron microscopy. |
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| Keywords: | Positron annihilation technique Irradiated graft Free volume |
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