应用科学学报 ›› 1994, Vol. 12 ›› Issue (4): 355-360.

• 论文 • 上一篇    下一篇

用正电子湮没寿命谱学法研究聚四氟乙烯改性和结晶度关系

史子康   

  1. 中国科学院福建物质结构研究所
  • 收稿日期:1992-07-03 修回日期:1993-07-10 出版日期:1994-12-31 发布日期:1994-12-31

A STUDY ON THE RELATIONSHIP BETWEEN THE CHANGE OF PERFORMANCE AND CRYSTALLINITY OF POLYTETRAF LUOROETHYLENE BY MEANS OF THE POSITRON ANNIHILATION LIFETIME SPECTROSCOPY

SHI ZIKANG   

  1. Fujian Institute of Research on the Structure of Matter, Academia Sinica
  • Received:1992-07-03 Revised:1993-07-10 Online:1994-12-31 Published:1994-12-31

摘要: 该文首次提出用e+湮没寿命谱学参数计算PTFE的结晶度:研究了退火、60Co的低剂量照射对结晶度影响的机理;揭示出次长成份是e+、O-Ps捕获态的过渡态,在该态中不存在P-Ps的捕获湮没。

关键词: 退火, PTFE结晶度, 60Co照射, 正电子湮没

Abstract: In this paper, the positron annihilation lifetime spectroscopy parameters are used to calculate the crystallinity of PTFE for the first time.The mechanisms of influence of annealing and a low dose of 60Co-irradiation on the crystallinity are studied.Itis brought to light that the secondary long composition of the positron annihilation lifetime spectrum is the transition state to the captured positron e+ or positronium O-P.In this state there exists no positronium P-PS captured or annihilated.

Key words: PTFE crystallinity, 60CO-irradiation, positron annihilation, anneal