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研究了聚对苯二甲酸乙二酯的玻璃化转变和结晶过程对正电子湮没寿命谱的影响.结果表明,结晶过程对正电子湮没的长寿命组份τ_3的寿命值不敏感,用这种方法测得的“T_g”不随结晶度而变化,而长寿命组份的相对强度则随结晶度的增加而减小.
The effect of glass transition and crystallization process on the lifetime of positron annihilation was studied.The results show that the crystallization process is insensitive to the lifetime of positron annihilation long-life component τ_3, The “T_g” measured by the method does not change with the degree of crystallinity, whereas the relative intensity of the long-lived fraction decreases with increasing crystallinity.