Synthesis and application of water‐soluble hyperbranched poly(ester)s from maleic anhydride and glycerol

Abstract

A water-soluble hyperbranched polyester with a considerable number of hydroxyl terminal groups was synthesized by reacting maleic anhydride and glycerol in the absence of a solvent. The synthesized intermediate product was converted to the hyperbranched polyester by condensation polymerization, and the water by-product produced during the esterification reaction may be removed by vacuum distillation. In the synthesis process, the crosslinking reaction occurs readily if maleic anhydride is in excess. The result shows that the product synthesized by this one-step method is insoluble in water at room temperature, whereas the product of a quasi onestep method, in which pentaerythritol was added as a core molecule, has good water solubility when pentaerythritol and the raw material have a molar ratio of 1 : 100 or 1 : 150. The resulting hyperbranched polyester was purified by column chromatography and characterized by infrared spectrometry. The synthetic hyperbranched polyester was used at 0.5% as a crosslinking agent for acrylic ester to inform acrylic ester latex film; the water absorption of the film was decreased significantly, the viscosity was increased, and some mechanical properties were improved.

Synthesis of Cu-Ag@Ag particles using hyperbranched polyester as template

“…They have been widely used in many fields. [6][7][8] Using hyperbranched polymers as templates to synthesize metal nanoparticles is attracting more and more attentions in recent years. Sun et al [9] synthesized silver nanoparticles using methoxycarbonyl-terminated hyperbranched poly (amine-ester) as templates; Mahapatra and Karak [10] synthesized silver nanoparticle in DMSO solution in the presence of hyperbranched polyamine; and Sun et al [11] researched the effects of hyperbranched poly(amido-amine)s generation number on synthesis of Ag nanoparticles.…”

Synthesis of novel hyperbranched polymers featuring oxazoline linear units and their application in fast‐drying solvent‐borne coating formulations

“…GPC analysis also revealed that a dramatic effect upon the molecular weight of the HBPs had occurred during the end‐capping procedures (Table and Supporting Information Figs. 9 and 10, GPC traces)—the high PDIs (>20) of acid‐terminated 7a and 7b (PDI values of this magnitude have been reported for hyperbranched polyesters) were reduced to below 3.5 postend‐capping with citronellol.…”

Monomers and Macromonomers from Renewable Resources

“…The preparation of hydroxyesters or hydroxyacids from glycerol and their polycondensation by transesterifi cation has been the subject of recent studies aimed at preparing biodegradable hyperbranched polycarbonates [29] and polyesters [30,31] . Although hyperbranched polyglycerols (Figure 1.11 ) have not thus far been synthesized directly from glycerol, much work has been devoted to their preparation, because of their interesting properties, including biocompatibility, biodegradability, water solubility and aptitude to easy functionalization.…”