Synthesis of Hyperbranched Aromatic Polyamide from Aromatic Diamines and Trimesic Acid

Tuning the Solubility of Copper Complex in Atom Transfer Radical Self-Condensing Vinyl Polymerizations to Control Polymer Topology via One-Pot to the Synthesis of Hyperbranched Core Star Polymers

“…In early syntheses of hyperbranched polymers, reactions of monomers ABx (x ≥ 2) where the A and B groups can condense with each other exclusively resulted in step-growth polymerization becoming a predominant method. Thus, an enormous numbers of different types of hyperbranched polymers have been synthesized, including polyphenylenes [8,9], polyesters [10][11][12], polyether [13,14], polysiloxysilanes [15], and polybenzamides [16,17], a variety of which have been reviewed [18,19]. Through conventional step-growth mechanisms, hyperbranched polymers can be synthesized in one-pot, avoiding the need for multiple reactions with protection, deprotection, and purification steps typically required for constructing perfect dendrimers, but with the drawback of large polydispersities in molecular weight and structure.…”

Liquid crystalline photoactive hyperbranched and linear benzylidene polyester with terminal epoxy and pendant hydroxyl groups

“…2,3 The study of HBP is being continued due to their highly branched backbone with programmable free active functional sites, which offer enhanced physicochemical properties. [4][5][6] They show many interesting properties similar to those of dendrimers such as (a) freedom from entanglements, (b) good solubility in common organic solvents, and (c) low melt and solution viscosity. 7 Limited availability of AB n monomers increases the use of readily available A 2 þ B 3 monomers for the synthesis of HBP.…”

Modification of bisphenol-A based bismaleimide resin (BPA-BMI) with an allyl-terminated hyperbranched polyimide (AT-PAEKI)

“…However, because the aliphatic polyester possesses low thermal stability and modulus, these systems showed significant compromise in either T g or modulus. Recently, a plethora of heat-resistance HBPs, such as hyperbranched PEK [7,9,[19][20][21], ether imide [10,[22][23][24][25][26][27], aromatic polyester [4,28] and aromatic polyamide [8,29,30], have been reported. Despite this great variety, no study on the toughening of epoxy or BMI resin with any of these HBPs has been reported.…”