The synthesis, characterization and rheological properties in aqueous solution of two telechelic polymers of different structures and size are reported: they are water soluble polyacrylamides, hydrophobically modified with linear and di-substituted hydrophobic initiators. The polymers were prepared via free radical micellar polymerization. The results of static light scattering (SLS), showed similar weight-average molecular weights (M-w) in all of the synthesized polymers. No signal corresponding to the presence of the hydrophobic group of the initiator could be observed by H-1 NMR; however, the presence of these hydrophobic groups was demonstrated using rheological measurements.