A comparative study of the structure–property behavior of highly branched segmented poly(urethane urea) copolymers and their linear analogs

Metallo‐supramolecular Crosslinked Polyurethanes

“…); in the absence of a metal salt, PUBIP is a soft, elastic material with a strain at break of over 1100%. Such behavior is similar to literature reports for other PUs based on PTMO and having HS contents of roughly 30% . Furthermore, as the samples are deformed, strain‐induced crystallization of the PTMO soft segment occurs, reinforcing the polymer and producing an increase in observed modulus in the tensile data (Fig.…”

A model of charge transport and electromechanical transduction in ionic liquid-swollen Nafion membranes

“…In the case of the RuO 2 -plated membranes, a linear poly(urethane urea) was used as the binder layer and was applied by painting from a 3% (by weight) solution in a mixed solvent of 50% (by weight) isopropyl alcohol and 50% tetrahydrofuran. The synthesis and properties of the poly(urethane urea) have been reported previously [31]. After drying the binder layer, the membranes were sandwiched between two waxed paper-backed gold leaves (approximately 50e100 nm in thickness) and pressed at 170 C and 2.5 MPa for 10 s. The waxed paper was then peeled away and the edges of the samples were trimmed prior to testing.…”

Dendritic Polymers Based on Urethane Chemistry – Syntheses and Applications

“…The polymers showed microphase separated morphologies and mechanical properties close to their linear analogs. [45,46] Investigations on the rheological behavior of a highly branched polyurethane system, based on H 12 MDI-capped polyether diol as A 2 -compound and TMP as B 3 -unit, showed a strong decrease in viscosity of the highly branched system in comparison to a linear polymer. [47] The degree of branching of these long soft segment containing polymers was determined to be between 30 and 50% by NMR-measurements.…”