SAXS Studies on the Structure Behaviors of Crosslinked PTFE Irradiated by Gamma Ray
SAXS Studies on the Structure Behaviors of Crosslinked PTFE Irradiated by Gamma Ray
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DOI：
10.1177/0967391111019004-529
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发表时间：
2011-06
影响因子：
2.1
通讯作者：
Tian Feng;Tang Zhongfeng;Xu Hongjie;Wang Jie;W. Guozhong;Li Xiuhong
中科院分区：
文献类型：
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作者：
Tian Feng;Tang Zhongfeng;Xu Hongjie;Wang Jie;W. Guozhong;Li Xiuhong
采用热分析和SAXS技术研究了室温空气中γ射线辐照交联聚四氟乙烯(XPTFE)的结构变化。辐照XPTFE的断链在室温下占主导地位，并且随着剂量的增加而增加。辐照期间断链增强了结晶。 XPTFE经γ射线辐照后的熔化温度和熔化热随着吸附剂量的增加而增加。样品的散射强度随着剂量的增加而降低。在伽马射线剂量达到100 kGy之前，样品的分形维数减小，但过渡层参数的厚度变小，然后随着剂量超过100 kGy而增加。辐照的XPTFE样品表现出自相似结构。 XPTFE在空气中经伽马射线辐照后结构发生变化，是XPTFE断链的原因。
The structural changes of crosslinked polytetrafluoroethylene (XPTFE) by gamma ray irradiation in air at room temperature were studied by thermal analysis and SAXS techniques. The chain scission of irradiated XPTFE was predominant in room temperature and increased with an increase of dose. The crystallization is enhanced by chain scission during irradiation. The melting temperature and melting heat of XPTFE irradiated by gamma ray increased with the adsorbed dose. The scattering intensity of samples decreased with increasing dose. The fractal dimension of sample decreased but the thickness of transition layer parameter becomed smaller before 100 kGy gamma ray dose, and then it increased with dose above 100 kGy Irradiated XPTFE samples exhibited self-similarity structure. Chain scission of XPTFE is responsible for its structural change after XPTFE irradiated by gamma ray in air.