Molecular characteristics of poly(propylene imine) dendrimers as studied with translational diffusion and viscometry

The generation of dendrimers based on poly(propylene imine) with CN end groups [DAB-dend(CN)(N)] and with palmitol end groups [DAB-dend-(C15)(N)] was by methods of translational diffusion and viscometry. The volumes of the DAB dend (CN), and DAB-dend-(05), dendrimers and the previously Studied DAB-dend (lacto), dendrimer were compared to evaluate the volumes of the end groups in hybrid dendrimers. The volume of the hybrid dendrimers compared to that of the initial dendrimers increases proportionally to the number of end groups: this means that the end groups are predominantly located on the periphery of each molecule, thus ensuring this volume will increase. It is shown that the volume of the end groups Cor DAB-dend-(C15)(x) is 3.5 times greater, and for DAB-dend-(lacto), it is 5.0 times greater than that Occupied by free molecules corresponding to the end groups,, The values of the intrinsic viscosity were compared with the Values Of the diffusion coefficient and the chemical formula molecular weight