Electrostatic long-range and short-range interactions in linear poly(allylamine hydrochloride) chains

Abstract

The efficiencies of two azo initiators in the polymerization of allylamine salts in water and organic solvents were compared. The hydrodynamic and molecular characteristics of poly(allylamine hydrochloride) in 0.1 M NaCl in the molecular mass range M×10−3=18−65 were studied, and the scaling relationships were derived for the intrinsic viscosity ([η]=7.65×10−3M0.8±0.1), translational diffusion coefficient (D0=2.41×10−4M−(0.59±0.05)), and velocity sedimentation coefficient (s0=2.77×10−15M0.41±0.05). The hydrodynamic data were interpreted in terms of electrostatic long-range and short-range interactions. The equilibrium rigidity of poly(allylamine hydrochloride) chains in 0.1 M NaCl and its structural and electrostatic constituents were quantitatively estimated. It was shown that the conformation of poly(allylamine hydrochloride) chains in pure water is close to rodlike.