Effect of pH, Temperature, Molecular Weight and Salt Concentration on the Structure and Hydration of Short Poly(<i>N</i>,<i>N</i>-dimethylaminoethyl methacrylate) Chains in Dilute Aqueous Solutions: A Combined Experimental and Molecular Dynamics Study.

ABSTRACT: We study the microstructural properties and state of hydration of aqueous low-molecular-weight poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) solutions and their dependence on polymer concentration and pH by means of detailed atomistic Molecular Dynamics (MD) simulations and experiments. For infinitely dilute solutions with a degree of polymerization of N = 30 at basic pH conditions, no temperature dependence is observed on the overall shape and state of hydration of the polyelectrolyte. This is supported by the experimental component of our work according to which the hydrodynamic radius, R_h, does not change dramatically with temperature. Small, but not drastic, changes are observed for solutions with longer PDMAEMA chains (N = 50, 70, an

SUBMITTER: Mintis DG 

PROVIDER: S-EPMC12389623 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature