Influence of molecular architecture on behavior of thermoresponsive poly-2-ethyl-2-oxazine in saline media

Linear and calix[4]arene based star-shaped poly-2-ethyl-2-oxazines have been explored in saline solutions at NaCl concentration of 0.0050gcm⁻³. The calix[4]arene core promotes an aggregation in solutions of the star-shaped polymer and a decrease in its phase separation temperature. Poly-2-ethyl-2-oxazine is more sensitive to the presence of NaCl in solution than the known poly-2-isopropyl-2-oxazolines.