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Oligo(ß-Alanine)-Grafted Butyl Rubber (IIR) with Mixed O(ligo(ß-Alanine) Lengths

Chen, Junyi
http://rave.ohiolink.edu/etdc/view?acc_num=akron1427827046

Abstract Details

2015, Master of Science, University of Akron, Polymer Science.
Thermoplastic elastomers (TPE) are polymeric materials which include microphase-separated block and continuous phase of soft block with a low glass transition temperatures (Tg) that generally possess the processability of thermoplastics and the elasticity of vulcanized rubber1. The microphase-separated block act as a crosslinker by reversible physical interaction. As a result, the soft polymer block are fixed and form a network. When the system is raised to a temperature sufficiently high enough to break the secondary interactions of the hard block, the cross-linking behavior will be temporarily lost and the system will be allowed to be processed. On the other hand, the network of vulcanized rubber is chemical cross-linked via irreversible covalent bonding, which makes it impossible to be reprocessable. In our previous research, butyl rubber (IIR) containing novel hard domains of Oligo(ß-alanine) (nylon 3) was synthesized and characterized. Nylon 3 is unique to the nylon family because nylon 3 has a strong propensity to form flat (non-pleated), anti-parallel, beta sheets, has high thermal stability, and good solvent resistance2. It is proved by TEM that this system will microphase separate3. These Oligo(ß-alanine) crystalline domains will act as physically cross-linkers and reinforce the TPE. In this research, the focus has been the synthesis and characterization of IIR containing Oligo(ß-alanine) with different segment lengths. The goal of this project is to understand length-dependent molecular recognition of Oligo(ß-alanine)4. It is hypothesized that the aggregation domains of Oligo(ß-alanine)-grafted IIR with mixed Oligo(ß-alanine) lengths are discriminated by molecular length. This self-sorting behavior give a new method to modulate mechanical property of TPE.
Li Jia, Dr. (Advisor)
Gary Hamed, Dr. (Committee Member)
58 p.
Polymer Chemistry; Polymers

Recommended Citations

Citations

  • Chen, J. (2015). Oligo(ß-Alanine)-Grafted Butyl Rubber (IIR) with Mixed O(ligo(ß-Alanine) Lengths [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1427827046

    APA Style (7th edition)

  • Chen, Junyi. Oligo(ß-Alanine)-Grafted Butyl Rubber (IIR) with Mixed O(ligo(ß-Alanine) Lengths. 2015. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1427827046.

    MLA Style (8th edition)

  • Chen, Junyi. "Oligo(ß-Alanine)-Grafted Butyl Rubber (IIR) with Mixed O(ligo(ß-Alanine) Lengths." Master's thesis, University of Akron, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1427827046

    Chicago Manual of Style (17th edition)

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