Figure 10.

(A) Influence of temperature on light transmittance (500 nm) through a sample of aqueous poly(OEG₄-CH)₁₅₀. Solid red line = heating; dashed blue line = cooling; 1 °C/min. (B) Reversible change in optical transmittance of aqueous poly(OEG₄-CH)₁₅₀ when temperature was alternated between 30 °C (high transmittance) and 45 °C (low transmittance); 5 min per each heating/cooling cycle. (C) Cloud point temperatures of poly(OEG₄-CH)₁₅₀ measured in different Hofmeister salts (Na⁺ counterion) at concentrations up to 1.0 M. All poly(amino acid)s were prepared at 3 mg/mL. Reproduced with permission [28]. Copyright 2014, American Chemical Society.