Relationships between lateral force and viscoelastic properties for amorphous polymer films based on lateral force microscopy

Won Ki Lee, Jeong Sik Yoon, Keiji Tanaka, Noriaki Satomi, Xiqun Jiang, Atsushi Takahara, Chang Sik Ha, Tisato Kajiyama

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8 Citations (Scopus)


The relationships between lateral force and viscoelastic properties of amorphous polymer surfaces with Tg's lower and higher than room temperature (295 K, RT) and their blend systems have been studied on the basis of lateral force microscopic (LFM) measurement. Under the conditions of scanning rate of 102-105 nm sec-1, normal load of 5 nN and RT, the lateral forces of poly(methyl methacrylate) (PMMA) and polyisoprene (PI) homopolymers with Tg's fairly higher and lower than RT, respectively, did not depend on the scanning rate. Whereas, the lateral force of poly(methyl acrylate) (PMA) with Tg≤RT decreased with an increase in the scanning rate. Also, poly(vinyl acetate) (PVAc) with Tg≥RT showed slight dependence on the scanning rate. The scanning rate dependence of lateral force was similar to the frequency dependence of mechanical loss modulus. The results indicate that the magnitude of lateral force strongly depends on the state of thermal molecular motion. The lateral force-viscoelastic properties of miscible polymer blends was also investigated by LFM.

Original languageEnglish
Pages (from-to)369-376
Number of pages8
JournalPolymer Bulletin
Issue number3
Publication statusPublished - Sep 1997


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

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