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Title Synthesis and Properties Study of a Doubly-Crosslinked Material Based on a Hyperbranched Polyacrylate with Hydrocarbon-Fluorocarbon Ester Substituents
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Publication Date
Degree MS
Discipline/Department Polymer Science
Degree Level masters
University/Publisher University of Akron
Abstract Both covalent and especially physical crosslinks can improve the mechanicalproperties of a material. Aliphatic fluorocarbons are highly immiscibile withaliphatic hydrocarbons, including when incorporated as linked alkoxysubstitutents on liquid crystalline mesogens. This indicates that fluorocarbonhydrocarbonsegments will also result in physical crosslinks in a materialcontaining both types of segments. Atom transfer radical coupling (ATRC) wasrecently developed as an approach to couple polymer chains with halogen endgroups, such as the many halogen atoms found in hyperbranched polymersprepared by self-condensing vinyl polymerization (SCVP) of an inimerpolymerized by atom transfer radical polymerization. The Pugh group recentlydeveloped the first hyperbranched polyacrylates prepared by homopolymerizationof acrylate inimers, including inimers containing fluorocarbon-hydrocarbonsegments. Based on these results, we hypothesize that it is possible to synthesizea doubly-crosslinked material using a hyperbranched polyacrylate prepared bySCVP of [2-bromo-2-(2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluorononan-1-ivoxycarbonyl)]ethyl acrylate, followed by chemical crosslinking by ATRC throughthe many halogen atoms throughout the hyperbranched structure. We firstoptimized the polymerization conditions for our model, a non-fluorinated analogof the hyperbrached polymer, and then successfully crosslinked this hyperbrachedpolymer to an insoluble powder using ATRC conditions withazobisisobutyronitrile (AIBN) as a reducing agent.
Subjects/Keywords Polymer Chemistry; Polymers; ATRP; ATRC; SCVP; double crosslinked; fluorinated side chain
Contributors Pugh, Coleen (Advisor)
Language en
Rights unrestricted ; This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
Country of Publication us
Format application/pdf
Record ID oai:etd.ohiolink.edu:akron1369046926
Repository ohiolink
Date Retrieved
Date Indexed 2016-12-22
Grantor University of Akron

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