title: Thermomechanical Formation-Structure-Property Relationships in Photopolymerized Copper-Catalyzed Azide-Alkyne (CuAAC) Networks.
abstract: Bulk photopolymerization of a library of synthesized multifunctional azides and alkynes was carried out toward developing structure-property relationships for CuAAC-based polymer networks. Multifunctional azides and alkynes were formulated with a copper catalyst and a photoinitiator, cured, and analyzed for their mechanical properties. Material properties such as the glass transition temperatures (Tg) show a strong dependence on monomer structure withTgvalues ranging from 41 to 90 °C for the series of CuAAC monomers synthesized in this study. Compared to the triazoles, analogous thioether-based polymer networks exhibit a 45-49 °C lowerTgwhereas analogous monomers composed of ethers in place of carbamates exhibit a 40 °C lowerTg. Here, the formation of the triazole moiety during the polymerization represents a critical component in dictating the material properties of the ultimate polymer network where material properties such as the rubbery modulus, cross-link density, andTgall exhibit strong dependence on polymerization conversion, monomer composition, and structure postgelation.
authors.affiliation: Department of Chemical and Biological Engineering and Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80309-0596, United States.
authors.forename: Austin
authors.initials: A
authors.lastname: Baranek
authors.affiliation: Department of Chemical and Biological Engineering and Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80309-0596, United States.
authors.forename: Han Byul
authors.initials: HB
authors.lastname: Song
authors.affiliation: Department of Chemical and Biological Engineering and Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80309-0596, United States.
authors.forename: Mathew
authors.initials: M
authors.lastname: McBride
authors.affiliation: Department of Chemical and Biological Engineering and Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80309-0596, United States.
authors.forename: Patricia
authors.initials: P
authors.lastname: Finnegan
authors.affiliation: Department of Chemical and Biological Engineering and Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80309-0596, United States.
authors.forename: Christopher N
authors.initials: CN
authors.lastname: Bowman