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

Journal of Applied Sciences ›› 1994, Vol. 12 ›› Issue (4): 355-360.

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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

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

Abstract

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

SHI ZIKANG. A STUDY ON THE RELATIONSHIP BETWEEN THE CHANGE OF PERFORMANCE AND CRYSTALLINITY OF POLYTETRAF LUOROETHYLENE BY MEANS OF THE POSITRON ANNIHILATION LIFETIME SPECTROSCOPY[J]. Journal of Applied Sciences, 1994, 12(4): 355-360.

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

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