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. 2022 Nov 8;38(46):14371–14386. doi: 10.1021/acs.langmuir.2c02515

Table 2. Summary of DLS Diameters (DH)a Obtained for Aqueous Dispersions of Diblock Copolymer Micelles at 25 °C by SDb and by PIMc.

  DH (nm)
polymer SDb PIMc
H66-b-G275 phase separation at H2O > 80% N/Ad
H38-b-G475 39 ± 2 30 ± 2
H73-b-G475 phase separation at H2O > 80% 40 ± 2
H93-b-G975 34 ± 2 32 ± 2
H75-b-G269G96 phase separation 138 ± 2e
H68-b-G264G911 phase separation 49 ± 2
H45-b-G253G922 34 ± 2 29 ± 2
H60-b-G253G922 39 ± 2 26 ± 2
H67-b-G222G953 59 ± 2 24 ± 2
a

Mean value of three measurements ± difference between maximum and minimum values.

b

Polymers were dissolved in DMF and then water was slowly added to 80% (w/w %). Residual DMF was removed by dialysis. Final polymer concentration: 1.5 mg mL–1 in water.

c

1.5 mg mL–1 polymer in water with 1.5 equiv of NaOH, resulting in a measured pH 11–11.5. HCl (0.1 M) was then gradually added to reach pH 4.5–5.

d

1.5 mg mL–1 polymer in water at pH 12.4. After polymer addition, the measured pH was 12.3. HCl (0.1 M) was then gradually added and phase separation occurred at pH < 10.4.

e

1.5 mg mL–1 polymer in water at pH 12.6. After polymer addition, the measured pH was 12.5. HCl (0.1 M) was then gradually added to reach pH 4.