Conformations of polyelectrolyte macromolecules with different charge density in solutions of different ionic strengths

18th International Conference PhysicA.SPb

Dommes, O.A.^1 ; Okatova, O.V.^1 ; Pavlov, G.M.^1,2

Institute of Macromolecular Compounds Russian, Academy of Sciences, Bolshoy pr. 31, St.Petersburg

199004, Russia^1

Saint Petersburg State University, Universitetskaya nab. 7/9, St.-Petersburg

199034, Russia^2

关键词: Conformational behavior;    Degrees of polymerizations;    Hydrophilic copolymers;    Interpolymer complexes;    Intrinsic viscosity;    Isolated molecules;    Molecular hydrodynamics;    Translational diffusion coefficient;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/769/1/012017/pdf
DOI  :  10.1088/1742-6596/769/1/012017

来源: IOP

【 摘 要 】

Studies of charged polymer chains are interesting in both fundamental and applied aspects. Especially, polyelectrolytes attract huge attention of researchers due to their ability to form interpolymer complexes with synthetic and biopolymers. The study was carried out on the fractions of hydrophilic copolymers of N-methyl-N-vinyl acetamide and N-methyl-N-vinyl amine hydrochloride of different degrees of polymerization and of different charge density using methods of molecular hydrodynamics. Hydrodynamic and conformational characteristics as well as molar masses of isolated molecules were estimated. In addition, the intrinsic viscosity of fractions was studied at the extreme ionic strengths - in distilled water (∼10-6M) and in 6M NaCl. Scaling relations for intrinsic viscosity, sedimentation and translational diffusion coefficients with molar mass were obtained. Conformational behavior of macromolecules with different linear charge density was compared.