Change of distribution of free volume holes during crystallization of poly(ethylene terephthalate) revealed by positron annihilation lifetime spectroscopy

Hamdy F.M. Mohamed, Yasuo Ito, Masayuki Imai

研究成果: Article査読

21 被引用数 (Scopus)

抄録

Change of free volume holes during crystallization of amorphous poly(ethylene terephthalate) at 130°C was investigated by positron annihilation lifetime technique together with the measurements of specific density and wide angle x-ray scattering (WAXS). The o-Ps intensity, I3, decreased by 24.6% with the crystallization. This value agreed with the degree of crystallinity determined by the specific density and WAXS, which indicates that o-Ps annihilation takes place in the amorphous part. The average o-Ps lifetime increased slightly by the crystallization. Detailed analysis of the o-Ps lifetime by a continuous distribution model showed that the small size component of the distribution disappeared due to the crystallization. The result is favorably compared with the recently proposed picture of crystallization which deals with the conformational change of ethylene group.

本文言語English
ページ(範囲)4841-4845
ページ数5
ジャーナルJournal of Chemical Physics
105
11
DOI
出版ステータスPublished - 1996
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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