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Development of a Chemiresistor Sensor for Polypropylene Degradation Products

  • Shawn M. Dirk (a1), Patricia S. Sawyer (a2), Robert Bernstein (a3), James M. Hochrein (a4), Cody M. Washburn (a5), Stephen W. Howell (a6) and Darin C. Graf (a7)...

Abstract

This paper presents the development of a sensor to detect the oxidative and radiation induced degradation of polypropylene. Recently we have examined the use of crosslinked assemblies of nanoparticles as a chemiresistor-type sensor for the degradation products. We have developed a simple method that uses a siloxane matrix to fabricate a chemiresistor-type sensor that minimizes the swelling transduction mechanism while optimizing the change in dielectric response. These sensors were exposed with the use of a gas chromatography system to three previously identified polypropylene degradation products including 4-methyl-2-pentanone, acetone, and 2-pentanone. The limits of detection 210 ppb for 4-methy-2-pentanone, 575 ppb for 2-pentanone, and the LoD was unable to be determined for acetone due to incomplete separation from the carbon disulfide carrier.

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Development of a Chemiresistor Sensor for Polypropylene Degradation Products

  • Shawn M. Dirk (a1), Patricia S. Sawyer (a2), Robert Bernstein (a3), James M. Hochrein (a4), Cody M. Washburn (a5), Stephen W. Howell (a6) and Darin C. Graf (a7)...

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