Synthesis of hyperbranched polymers from commercially available A2 and BB′2 type monomers

This work describes a new strategy for the preparation of hyperbranched polymers from commercially available A(2) and BB'(2) type monomers without any catalysts; the rapid reaction of A groups with B groups results in the formation of dimers that can be regarded as a new sort of AB'(2) type monomer; further polymerization of AB'(2) gives hyperbranched polymers; through this approach a new kind of water-soluble hyperbranched polysulfone-amine was synthesized by polyaddition of N-methylpropane-1,3-diamine (BB'(2)) to divinyl sulfone (A(2)).