Polymer chain diffusion at a temperature below its bulk glass transition temperature

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Abstract

In this study, it was examined whether the dynamics of polymer chains at a surface is different from that in the bulk, and if so, to what extent they differ in terms of surface glass transition temperature and diffusion coefficient. Obtained results clearly indicate that surface chains can travel for a relatively large distance in comparison with the characteristic length scale of usual segmental motion even at a temperature below its bulk glass transition temperature, Tg b. This is consistent with our previous results that the surface glass transition temperature is much lower than the corresponding Tg b. Also, it was experimentally revealed that there was a gradient of molecular motion in the surface region.

Original languageEnglish
Pages (from-to)141-146
Number of pages6
JournalChinese Journal of Polymer Science (English Edition)
Volume21
Issue number2
Publication statusPublished - Mar 2003

All Science Journal Classification (ASJC) codes

  • Materials Chemistry
  • Polymers and Plastics

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