Self-diffusion in solutions of carboxylated acrylic polymers as studied by Pulsed Field Gradient NMR. 2. Diffusion of macromolecules

摘要: The diffusion constants of carboxylated acrylic copolymers in isopropanol (IPA) have been investigated using the PFG NMR technique. A range compositions butyl methacrylate and methacrylic acid random (BMA–MAA 100/0 through to 60/40 10 mol% steps) studied. polymer diffusivity is two orders magnitude slower than that for solvent. maximum value G max = T/m gradient pulse was used suppress solvent signal measure low self-diffusion coefficient polymers. Polymer studies at different times showed constant decreased with increasing time. influence concentration on aggregation solution BMA/MAA molar ratio long increased BMA which similar short time studies. data obtained discussed published results models “anomalous diffusion” macromolecules solutions.