Effects of network structures on the tensile toughness of copper-catalyzed azide-alkyne cycloaddition (CuAAC)-based photopolymers.

ABSTRACT: In the present study, the photo-initiated copper-catalyzed azide-alkyne cycloaddition (CuAAC) polymerization was utilized to form structurally diverse glassy polymer networks. Systematic alterations in the monomer backbone rigidity (e.g., cyclic or aliphatic groups with a different length of backbone) and the reactive functional group density (e.g., tetra-, tri-, di-, and mono-functional azide and alkyne monomers) were used to provide readily tailorable network structures with crosslink densities (estimated from the rubbery modulus) varying by a factor of over 20. All eight of the resultant networks exhibited glass transition temperatures (T_g) between 50 and 80 °C with tensile toughness ranging from 28 to 61 MJ m^-3. A nearly linear dependence of yield stress and elong

SUBMITTER: Song HB 

PROVIDER: S-EPMC8057713 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature