The synthesis and characterization of thermally labile dendronized linear AB step-polymers is described. First through third generation dendritic AB monomers 14a-c containing both a furan and furan-protected maleimide functionality were prepared by the Cu(I)-catalyzed azide-alkyne cycloaddition reaction followed by polymerization via the thermally reversible furan-maleimide Diels-Alder reaction. The assembly, disassembly, and reassembly behavior of linear dendronized step-polymers 16a-c was studied by GPC.