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Development of Ion-Containing Polymers and Study of their Molecular, Mechanical, and Flexoelectric Properties

Marin Angel, Juan Camilo
http://rave.ohiolink.edu/etdc/view?acc_num=akron1627232468950217

Abstract Details

2021, Doctor of Philosophy, University of Akron, Polymer Engineering.
A crucial objective in the study of polymers is to comprehend how the interactions of atoms and molecules govern the molecular structure and the macroscopic properties of the materials. When those molecular characteristics are determined by the interactions of ions and polymer chains, the material is broadly classified as an ion-containing polymer. This classification contains an enormous number of materials, and it encompasses work from the first half of the last century to the most contemporary research in material development. Such long history has enriched the field with a broad spectrum of applications, such as mechanical and solubility modifiers, self-healing agents, or ionic conductivity boosters. In particular, this research investigates the effect of some ion-polymer interactions over the flexoelectric effect, and the rubbery behavior of a polymer matrix. To that purpose, a polymer membrane was designed targeting specific molecular characteristics. The flexoelectric response of the system was quantified, and the effect of the molecular structure over the electrochemical response was analyzed. The mechanism of polarization and the flexoelectric properties of the aforementioned membranes were studied. These membranes exhibited remarkably high flexoelectric coefficients (>1000 uC/m) that were at least three times larger than those reported in the literature to date. In addition, a rubbery film was developed based on a renewable monomer and ion-pair comonomers synthesized in-house. The viscoelastic response and chemical characterization were analyzed as a function of the molecular features. The effect of the ion-pair comonomers over the transient response of the rubbery films was well understood as a function of the molecular structure. The results established that the ion-pair comonomers imparted stretchability and additional stress relaxation mechanisms to the films. The molecular characteristics of the sol-fraction of the films were also analyzed. The aforementioned renewable monomer was also used to synthesize a Hemi – halato telechelic polymer that had never been reported before. The processes and conditions involved in the synthesis and characterization were optimized. Lastly, this research signifies that the renewable materials can be tuned via molecular modifications to obtain functional renewable rubbers. Molecular design is a powerful tool that allows the enhancement of the mechanical and electrochemical properties and facilitates the inclusion of renewable materials into the field of material development.
Kevin Cavicchi (Advisor)
Weinan Xu (Committee Chair)
Fardin Khabaz (Committee Member)
Toshikazu Miyoshi (Committee Member)
Yi Pang (Committee Member)
244 p.
Chemistry; Energy; Polymer Chemistry; Polymers
Sustainability, flexoelectricity, polarization, terpenes, telechelic polymer, ionomers, relaxation time

Recommended Citations

Citations

  • Marin Angel, J. C. (2021). Development of Ion-Containing Polymers and Study of their Molecular, Mechanical, and Flexoelectric Properties [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1627232468950217

    APA Style (7th edition)

  • Marin Angel, Juan. Development of Ion-Containing Polymers and Study of their Molecular, Mechanical, and Flexoelectric Properties . 2021. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1627232468950217.

    MLA Style (8th edition)

  • Marin Angel, Juan. "Development of Ion-Containing Polymers and Study of their Molecular, Mechanical, and Flexoelectric Properties ." Doctoral dissertation, University of Akron, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1627232468950217

    Chicago Manual of Style (17th edition)

akron1627232468950217
© 2021, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.