Temperature and molecular weight dependence of mutual diffusion coefficient of cyclic polystyrene/cyclic deuterated polystyrene Bilayer films

Daisuke Kawaguchi, Yutaka Ohta, Atsushi Takano, Yushu Matsushita

研究成果: Contribution to journalShort survey査読

17 被引用数 (Scopus)

抄録

Temperature and molecular weight dependence of diffusion behavior of cyclic polystyrenes/Cyclic Deuterated Polystyrene Bilayer Films with high purity by secondary ion mass spectroscopy (DSIMS). Monodisperse cyclic and linear polystyrenes (c-hPS, l-hPS) and those deuterated counterparts (c-dPS, l-dPS) were used in this study. Temperature dependence for c-PS and l-PS were calculated based on the empirical equations. Taking a slight difference in molecular weights of linear and cyclic molecules into account, temperature dependence value is calculated. The temperature dependence of segmental frictional coefficient for c-PS is found to be the same as that for l-PS. The effect of small amounts of linear contaminants on the diffusion of cyclic molecules might be more significant in low molecular weight regime than in high molecular weigh. The results also show that the linear contaminants can diffuse much faster than the cyclic molecules at a same annealing temperature.

本文言語英語
ページ(範囲)6748-6752
ページ数5
ジャーナルMacromolecules
45
16
DOI
出版ステータス出版済み - 8 28 2012
外部発表はい

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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