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SunY.the (final comments 2).pdf (2.09 MB)

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Cocoon construct around supramolecular domains in supramolecular elastomers

Sun, Yu
http://rave.ohiolink.edu/etdc/view?acc_num=akron1460410519

Abstract Details

, Master of Science in Polymer Engineering, University of Akron, Chemistry.
A fundamental paradox exists in elastomers. The strength and toughness of elastomers is a function of hysteretic dissipation of energy, but the dissipative processes inevitably involve displacement of molecular segments from their original locations and cause incomplete elastic recovery. Recently, our group investigated the use of oligo(ß-alanine) segments as the hard component of thermoplastic elastomers.19 The oligo(ß-alanine) segments form ß-sheets via hydrogen bonding, and these ß-sheets stack to form crystal domains dispersed in an elastic matrix. Like the ß-sheet crystals in silks,20 these crystal domains physically crosslink and reinforce the elastomer. In the case of oligo(ß-alanine) grafted-butyl rubber ((ß-Ala)x-g-IIR), the crystal domains are surrounded by geminal divinyl functional groups. In this research, I attempt to utilize these reactive groups to form a covalently constructed cocoon shell around the ß-sheet crystals. After attempting a number of methods, sulfur/TMTD vulcanization system is used to form the covalent construct around the crystals. Preliminary tensile test shows the tensile strength and modulus are improved by the covalent bond formation around the crystals. Future work will focus on structural, morphological, thermal, and mechanical characterization of the cocoon construct.
Li Jia (Advisor)
Toshikazu Miyoshi (Committee Member)
Polymer Chemistry

Recommended Citations

Citations

  • Sun, Y. (n.d.). Cocoon construct around supramolecular domains in supramolecular elastomers [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460410519

    APA Style (7th edition)

  • Sun, Yu. Cocoon construct around supramolecular domains in supramolecular elastomers. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1460410519.

    MLA Style (8th edition)

  • Sun, Yu. "Cocoon construct around supramolecular domains in supramolecular elastomers." Master's thesis, University of Akron. Accessed MAY 04, 2024. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460410519

    Chicago Manual of Style (17th edition)

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