Abstract
Hyperbranched polymers differ from classical oligomers and polymers by their structural symmetry, high degree of branching and maximized terminal functionality density. The divergent synthesis of a series of polydisperse hyperbranched polyesters based upon pentaerythritol and 1, 2, 4-benzenetricarboxylic anhydride, modified by glycidyl methacrylate and methacrylic anhydride is described, proceeding in a stepwise growth manner starting from an initiator core, building hyperbranched arms. These materials have about 8, 12 or 16 methacrylate double bonds at the chain extremities on each molecule. The resulting hyperbranched methacrylated polyester resins are expected to have high photocure rate than linear unsaturated polyester by addition of photoinitiator and comonomer.
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