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Synthesis and Properties Study of a Doubly-Crosslinked Material Based on a Hyperbranched Polyacrylate with Hydrocarbon-Fluorocarbon Ester Substituents

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2013, Master of Science, University of Akron, Polymer Science.
Both covalent and especially physical crosslinks can improve the mechanical properties of a material. Aliphatic fluorocarbons are highly immiscibile with aliphatic hydrocarbons, including when incorporated as linked alkoxy substitutents on liquid crystalline mesogens. This indicates that fluorocarbonhydrocarbon segments will also result in physical crosslinks in a material containing both types of segments. Atom transfer radical coupling (ATRC) was recently developed as an approach to couple polymer chains with halogen end groups, such as the many halogen atoms found in hyperbranched polymers prepared by self-condensing vinyl polymerization (SCVP) of an inimer polymerized by atom transfer radical polymerization. The Pugh group recently developed the first hyperbranched polyacrylates prepared by homopolymerization of acrylate inimers, including inimers containing fluorocarbon-hydrocarbon segments. Based on these results, we hypothesize that it is possible to synthesize a doubly-crosslinked material using a hyperbranched polyacrylate prepared by SCVP of [2-bromo-2-(2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluorononan-1- iv oxycarbonyl)]ethyl acrylate, followed by chemical crosslinking by ATRC through the many halogen atoms throughout the hyperbranched structure. We first optimized the polymerization conditions for our model, a non-fluorinated analog of the hyperbrached polymer, and then successfully crosslinked this hyperbrached polymer to an insoluble powder using ATRC conditions with azobisisobutyronitrile (AIBN) as a reducing agent.
Coleen Pugh, Dr. (Advisor)
Robert Weiss, Dr. (Committee Member)
87 p.

Recommended Citations

Citations

  • Lu, Y. (2013). Synthesis and Properties Study of a Doubly-Crosslinked Material Based on a Hyperbranched Polyacrylate with Hydrocarbon-Fluorocarbon Ester Substituents [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1369046926

    APA Style (7th edition)

  • Lu, Yangtian. Synthesis and Properties Study of a Doubly-Crosslinked Material Based on a Hyperbranched Polyacrylate with Hydrocarbon-Fluorocarbon Ester Substituents . 2013. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1369046926.

    MLA Style (8th edition)

  • Lu, Yangtian. "Synthesis and Properties Study of a Doubly-Crosslinked Material Based on a Hyperbranched Polyacrylate with Hydrocarbon-Fluorocarbon Ester Substituents ." Master's thesis, University of Akron, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1369046926

    Chicago Manual of Style (17th edition)