화학공학소재연구정보센터
Journal of Polymer Science Part B: Polymer Physics, Vol.57, No.7, 359-367, 2019
3 Determining thermo-mechanical properties of polydimethylsiloxanes from their strain-induced spectral fingerprints
Adaptive properties and complex shapes of modern day soft matter components create a challenge for materials applications where mechanical properties of intricate fabricated components cannot be determined from conventional invasive and destructive mechanical tests. In particular, challenges arising from variable mechanical properties of polydimethylsiloxanes (PDMSs) constantly attract wide-scale attention in the fields of material sciences, biological systems, and microfluidics. Herein, a noninvasive and nondestructive strain-induced infrared spectroscopic method (S-FTIR) is developed. S-FTIR is a method that maps thermo-mechanical response of PDMS to its strain-induced spectral fingerprint. From the results of this study, strong correlations of up to 95% between spectral fingerprint of PDMS and its corresponding nonlinear thermo-mechanical response is seen. Given the nature of these results, it is expected that S-FTIR will provide an interesting new analytical approach to understand soft materials and allow for the characterization of micro and nanoscale devices composed of these polymeric materials as well. (c) 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 359-367