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REAL-TIME MECHANICAL AND MECHANO-ELECTRICAL BEHAVIOR OF CARBON BLACK FILLED FILMS

Shen, Liyang
http://orcid.org/0000-0001-9928-2877
http://rave.ohiolink.edu/etdc/view?acc_num=akron1437691543

Abstract Details

2015, Master of Science in Polymer Engineering, University of Akron, Polymer Engineering.
The mechano-electrical behavior of a carbon black filled polyolefin film was investigated by using an instrumented stretching system designed to track true stress, true strain, and electrical conductivity during deformation. The results showed two distinctive behaviors at room temperature: during initial elastic deformation resistivity increases, this is followed by an unusual decrease in resistance, immediately beyond the yield point, presumably associated with crystal structure breakup and realignment of the polyolefin leading to the organization of percolated carbon black networks. Further increase in strain, led to a rapid rise in resistance associated with network damage and depercolation of the carbon black. By increasing the deformation temperature, the initial slope of resistance vs. strain decreases progressively. When the stretching temperature reaches the melting range, the resistivity decreases at initial deformation. At this temperature, the resistivity of the material continues to decrease with increasing deformation until a constant conductivity is reached until sample failure. Cyclic tests were performed to study the electrical resistivity at small strains. The resistivity decreases after several cycles, which is possibly caused by particle alignment. The stress relaxation effect was also studied, which revealed resistivity in the step-holding test was higher than the continuous stretching test. The composite loses conductivity at lower strain for step-holding test relative to continuous stretching. The microstructure and morphology were also characterized by wide angle X-ray scattering and electron microscopy, which provided evidence of alignment and orientation of polymer chains and conductive filler with deformation.
Mukerrem Cakmak, Dr. (Advisor)
Bryan Vogt, Dr. (Advisor)
Yu Zhu, Dr. (Committee Member)
Polymers

Recommended Citations

Citations

  • Shen, L. (2015). REAL-TIME MECHANICAL AND MECHANO-ELECTRICAL BEHAVIOR OF CARBON BLACK FILLED FILMS [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1437691543

    APA Style (7th edition)

  • Shen, Liyang. REAL-TIME MECHANICAL AND MECHANO-ELECTRICAL BEHAVIOR OF CARBON BLACK FILLED FILMS. 2015. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1437691543.

    MLA Style (8th edition)

  • Shen, Liyang. "REAL-TIME MECHANICAL AND MECHANO-ELECTRICAL BEHAVIOR OF CARBON BLACK FILLED FILMS." Master's thesis, University of Akron, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1437691543

    Chicago Manual of Style (17th edition)

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This open access ETD is published by University of Akron and OhioLINK.