期刊
POLYMER TESTING
卷 31, 期 7, 页码 926-930出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2012.06.012
关键词
AFM; Elastic modulus; Indentation; Polymer film
资金
- National Research Foundation of Korea (NRF)
- Korean government (MEST) [2011-0000409]
The elastic moduli of polystyrene (PS), polymethylmethacrylate (PMMA) and polydimethylsiloxane (PDMS) films were evaluated using an Atomic Force Microscope (AFM) with a steel micro-spherical probe tip. The elastic moduli of the polymeric films were determined with respect to indentation depth using the Hertz and Johnson-Kendall-Roberts (JKR) models. The measured elastic moduli of PS, PMMA and PDMS were determined to be 2.6 GPa, 0.74 GPa, and 4 MPa at indentation depths of 1.7 nm, 4 nm, and 120 nm, respectively. These results confirm the validity of the proposed method for effectively measuring the elastic properties of polymeric thin films. (c) 2012 Elsevier Ltd. All rights reserved.
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