Synthesis and properties of polyurethane elastomers crosslinked with amine-terminated AB2-type hyperbranched polyamides

Molecular dynamics in polyester- or polyether-urethane networks based on different diisocyanates

“…Chemical network parameters depend on the crosslinker's nature. Recently some papers dealing with the use of dendritic molecules as crosslinking agents were published [8]. Especially random hyperbranched (HB) macromolecules, which can be easily obtained by one-pot synthetic methods, are very promising crosslinking agents [2,9,10].…”

Molecular dynamics of linear and hyperbranched polyurethanes and their blends

“…Polyurethanes are, in most cases, segmented block copolymers composed of soft polyester or polyether segments and hard segments, formed by diisocyanates and low molar mass diols. The use of HB polymers as precursors with a compact architecture instead of linear polyether or polyester polyols results in HB PU with different material properties [32]. For the present work, two kinds of PU with different architecture, linear and HB, were synthesized: HB PU was made of HB polyester (Boltorn Ò H40, the fourth generation) and hexamethylene diisocyanate.…”

Dendrimers Clicked Together Divergently

“…This combination of functionality and architecture lend the dendrimers toward use as cross-linkers by a process that is similar to that demonstrated for other dendrimers 77,78 and hyperbranched polymers. 79,80 Investigations of the applications of these Click-constructed dendrimers as reactive and multifunctional globular macromolecules are underway. …”