Hyperbranched aromatic epoxies in the design of adhesive materials

Synthesis and Characterization of Low Viscosity Aromatic Hyperbranched Poly(trimellitic anhydride ethylene glycol) Ester Epoxy Resin

“…[1] Hyperbranched epoxy resins are of special interest because of their easy synthetic accessibility, low viscosity, high solubility and large number of end functional groups allow for their production in large quantities and application on an industrial scale. While different synthetic approaches to hyperbranched epoxy resins have been reported, including end group modification of hyperbranched polymers, [2][3] proton transfer polymerization, [4][5][6][7] end functionalization of hyperbranched poly(siloxysilane) [8] and functionalization of poly(methyl acrylate) by ATRP, [9] all those products were either solids or high viscosity liquids and would need dilution with organic solvents, which is detrimental to the environment. Their use was therefore limited to only being a toughener of common epoxy resin.…”

“…[2][3][4][5][6][7][8][9] Little literature is available concerning the synthesis of inexpensive low viscosity liquid hyperbranched epoxy resin. The present paper reports the facile synthesis and detailed characterization of a carboxyl-end low viscosity hyperbranched polymer from commercially available low cost materials.…”

Influence of end groups in hyperbranched polyesters used as modifiers in the characteristics of epoxy thermosets cured by adipic dihydrazide

“…Moreover, the great number of terminal groups has a significant effect on the reactivity, can increase the compatibility with the resin and helps to maintain thermomechanical characteristics [9,10]. Based on their unique properties, HBPs have been applied not only as tougheners for ther-Influence of end groups in hyperbranched polyesters used as modifiers in the characteristics of epoxy thermosets cured by adipic dihydrazide mosets but also in cross-linking or adhesive agents [11], compatibilizers [12], dispersers [13], processing aids, and rheology modifiers [14,15]. One of the most effective methods of inhibiting crack growth after impact is the addition of a second phase that induces the formation of particles that absorb the impact energy and deflect the crack [5].…”

Synthesis and characterization of low viscosity aromatic hyperbranched polyester epoxy resin

“…1 Hyperbranched epoxy resins are of special interest as their easy synthetic accessibility, low viscosity, high solubility, large number of functional groups, allows for their production in large quantities and application on an industrial scale. In the literature, a number of different synthetic approaches of the predominant hyperbranched epoxy resins have been reported, including end group modification of hyperbranched polymers, 2,3 proton transfer polymerization, [4][5][6][7] end functionalization of hyperbranched poly(siloxysilane) 8 and functionalization of poly(methyl acrylate) by ATRP. 9 However, all these hyperbranched epoxy resins were either solid or high viscosity liquid and would need dilution with organic solvent, which is detrimental to environment.…”

“…[2][3][4][5][6][7][8][9] There are few literature available on the synthesis of economically inexpensive low-viscosity liquid hyperbranched epoxy resin. The present paper reports the synthesis and detailed characterization of a carboxyl-end hyperbranched polymer and a low-viscosity liquid hyperbranched epoxy resin from lower cost materials and simple technology.…”