Synthesis of hyperbranched polymers with controlled structure

Long‐Chain Hyperbranched Polymers: Synthesis, Properties, and Applications

“…Hyperbranched polymers (HBPs) are highly branched macromolecules, resembling dendrimers, with a 3D dendritic globular conformation . Both of HBPs and dendrimers have demonstrated several common characteristics when compared with linear ones, such as a high number of terminal functional groups, lower solution and melt viscosity, better solubility, and lack of chain entanglement.…”

Recent Progress on Synthesis of Hyperbranched Polymers with Controlled Molecular Weight Distribution

“…So far, all reports that used multifunctional core molecule in either batch or semibatch polymerizations limited their initial feed ratios of monomer or inimer to core < 100:1, in order to obtain hyperbranched polymers with relatively low polydispersites (M w /M n 1.5) (22). Thus, the strategy of slow monomer addition, together with the use of multifunctional small molecules as core shows certain limitation on producing high-molecular-weight hyperbranched polymers.…”

“…Meanwhile, reports that attempted to produce hyperbranched polymers with 100% degree of branching (DB) by using special AB 2 monomers with slow reversible reaction of the first B group and fast reaction of the second B group will not be discussed. Instead, interested readers could learn more on this aspect from several recently published papers and review (17)(18)(19)(20)(21)(22).…”

Rhodium-complexed hyperbranched poly(ethyleneimine) and polyamidoamine and their non-covalent immobilization on magnetic nanoparticles

“…Therefore, these polymers could easily be very attractive for numerous industrial applications as favored alternative dendrimers analogues [18]. In addition, hyperbranched polymers attracted a great deal of interests in different fields including biology [19] or drug delivery [20,21], bioimaging [22] and catalysis [23e27] Due to the fact that hyperbranched polymers are capable of enhancing chemical reactivity and solubility because of their intrinsic high degree of branching (DB), which can reach up to 100% [28], these dendritic molecules have been adopted for many catalytic applications [29e32]. The judicious choice of a peripheral functionality is considered as an essential parameter for tuning their chemical properties, when being utilized as ligands for various metal catalyzed reactions [33e37], or for the stabilization of metal nanoparticles [38e43].…”