Mechanical Characterization of Elastomeric Polymer Through Micro Instrumented Indentation Technique

마이크로 압입시험기법의 응용을 통한 탄성체 고분자 소재의 역학적 특성화 및 계면 접합에너지 평가기법 연구

  • 이규제 (서울대학교 대학원 재료공학부) ;
  • 강승균 (서울대학교 재료공학부 대학원) ;
  • 강인근 (서울대학교 재료공학부 대학원) ;
  • 권동일 (서울대학교 재료공학부)
  • Published : 2007.09.01


In this study, the Johnson-Kendall-Roberts(JKR) theory was combined with the instrumented indentation technique (IIT) to evaluate work of adhesion and modulus of elastomeric polymer. Indentation test was used to obtain the load-displacement data for contacts between Tungsten Carbide indenter and elastomeric polymer. And the JKR contact model, contrived to take viscoelastic effects of polymer into account, was applied to compensate the contact area and the elastic modulus which Hertzian contact model would underestimate and overestimate, respectively. Besides, we could obtain the thermodynamic work of adhesion by considering the surface energy in this contact model. In order to define the relation between JKR contact area and applied load without optical measuring of contact area, we used the relation between applied load and contact stiffness by examining the correlation between JKR contact area and stiffness through dimensional analysis with 14 kinds of elastomeric polymer. From this work, it could be demonstrated that the interfacial work of adhesion and elastic modulus of compliant polymer can be obtained from a simple instrumented indentation testing without area measurement, and provided as the main algorithm of compliant polymer characterization.


Instrumented Indentation Technique;Dimensional Analysis;JKR(Johnson-Kendall-Roberts);Elastomeric Polymer;Work of Adhesion;Elastic Modulus


  1. Lee, G. J., Lee, H. K. and Kwon, D. I., 2007, 'Interfacial Characterization of Catalyst Coating on Electrolyte Polymer through Microscratch Analysis in DMFC,' Electrochimica Acta, Vol. 52, pp. 4215-4221
  2. Lee, G. J., Kang, S. K., Kang, I. G., and Kwon, D. I., 2007, 'Characterization of Elastic Modulus and Work of Adhesion in Elastomeric Polymer through Micro Instrumented Indentation Technique,' Proc. of KSME 2007 Spring Meeting, ublished on CD
  3. ASTM Definition of Term Relating to Adhesion D907-70, ASTM, Philadelphia, PA, 1970
  4. Johnson, K. L., Kendall, K. and Roberts, A. D. 1971, 'Surface Energy and the Contact of Elastic Solids,' Proc. of the Royal Society of London. A, Vol. 324, No. 1558, pp. 301-313
  5. White, F. M., 1979, Fluid Mechanics(3rd ed., 1994), McGraw-Hill, New York, pp. 251-293
  6. Sneddon, I. N., 1965, 'The Relation between Load and Penetration in the Axisymmetric Boussinesque Problem for a Punch of Arbitrary Profile,' Int. J. of Engineering of Science, Vol. 3, No. 1, pp. 47-57
  7. Hertz, H., 1882, 'On the Contact of Rigid Elastic Solids and on hardness,' for English Translation see miscellaneous Papers, Eds. Jones and Schott, 1896, London: Macmillan, pp. 90, 156