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A Novel Approach to Photoacoustic FT-IR Spectroscopy: Rheo-Photoacoustic Measurements

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A new rheo-photoacoustic Fourier transform infrared cell has been developed to perform stress-strain studies on polymeric materials. The rheo-photoacoustic measurements lead to the enhancement of the photoacoustic signal and allow one to monitor the effect of elongational forces on the molecular structure of polymers. Propagating acoustic waves are detected as a result of the deformational changes and thermal property changes upon the applied stress. Applications of this technique to fibers, films, and adhesion of thin films are presented.

Keywords: FT-IR; Rheo-photoacoustic spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702894204452

Affiliations: 1: Department of Polymers and Coatings, North Dakota State University, Fargo, North Dakota 58105 2: Department of Mechanical Engineering, North Dakota State University, Fargo, North Dakota 58105

Publication date: November 1, 1989

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