Study on polytetrafluoroethylene aqueous dispersion irradiated by gamma ray
- 作者：Jielong Su ; Guozhong Wu ; Yaodong Liu and Hongyan Zeng
- 关键词：Radiation ; PTFE ; Dispersion ; Degradation ; G(s)
- 刊名：Journal of Fluorine Chemistry
- 出版年：2006
- 期刊代码：52_00221139
- 类别：ch
- 出版时间：January 2006
- 卷：127
- 期：1
- 页码：91-96
- 文件大小：248 K
摘要
Gamma-radiation induced degradation of polytetrafluoroethylene (PTFE) in 60 wt.%dispersion was studied in the dose range of 20–200 kGy and the change in property of PTFE was characterized by differential scanning calorimetry (DSC), photon cross correlation spectroscopy (PCCS), X-ray diffraction (XRD), scanning electron microscopy (SEM), FT-IR spectroscopy and X-ray photoelectron spectroscope (XPS). It was found that the mean particle size of PTFE reduces from 250 nm of the control to 170 nm at 100 kGy, as confirmed by dynamic laser scattering and SEM. The crystallinity degree of PTFE increased at 20 kGy but remained unvaried at higher dose level. G-value of scission, G(s), was determined to be 0.46 μmol/J.