Surface thermomechanical and glass transition temperature measurements of polymeric solids

Tisato Kajiyama, Keiji Tanaka, Atsushi Takahara

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The surface molecular motion of polymeric solids was investigated on the basis of scanning force microscopic and temperature-dependent X-ray photoelectron spectroscopic measurements. The surface of the monodisperse polystyrene films was in a glass-rubber transition state even at 293 K in the case of number-average molecular weight less than ca. 30k. The surface glass transition temperature, Tgs for the symmetric poly(styrene-block-methyl methacrylate) diblock copolymer films were much lower than those for the bulk samples. A remarkable depression of Tg at the air-polymer interface was explained by the surface localization of chain end groups.

Original languageEnglish
Pages (from-to)677-682
Number of pages6
JournalMacromolecular Symposia
Volume118
DOIs
Publication statusPublished - Jan 1 1997

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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