Synthesis of hyperbranched polymers from commercially available A(2) and BB '(2) type monomers

This work describes a new strategy for the preparation of hyperbranched pol ymers 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 for mation of dimers that can be regarded as a new sort of AB'(2) type monomer; further polymerization of AB'(2) gives hyperbranched polymers; through thi s approach a new kind of water-soluble hyperbranched polysulfone-amine was synthesized by polyaddition of N-methylpropane-1,3-diamine (BB'(2)) to divi nyl sulfone (A(2)).