Table 1. Theoretical Number Average Molecular Weight (Mn), Number Average Hydrodynamic Diameter (Dh), Electrophoretic Mobility, and Apparent Zeta Potential (ζ) of Bottlebrush Polymers.
Sample | Mna (g mol–1) | Dh (nm)b | Electrophoresis mobility (μm cm V–1 s–1)c | ζ (mV)d |
---|---|---|---|---|
P[BiBEM-g-(PAA50-b-PNIPAm50)]320 (SBB50) | 2.96 × 106 | 39.5 ± 5.4 | –1.29 ± 0.04 | –16.5 ± 0.6 |
P[BiBEM-g-(PAA50-b-PNIPAm150)]320 (SBB150) | 6.58 × 106 | 41.8 ± 1.3 | –0.82 ± 0.06 | –10.5 ± 0.7 |
P[BiBEM-g-(PAA50-b-PNIPAm50)]1600 (LBB50) | 1.53 × 107 | 105.5 ± 5.3 | –1.26 ± 0.05 | –15.4 ± 0.6 |
P[BiBEM-g-(PAA50-b-PNIPAm150)]1600 (LBB150) | 3.34 × 107 | 91.5 ± 4.9 | –0.71 ± 0.09 | –9.1 ± 1.2 |
Theoretical number average molecular weight calculated according to the chemical composition.
Hydrodynamic diameters were determined in water at 100 mg L–1 of polymer concentration at pH 6.5 (10 mM NaCl) by dynamic light scattering (Malvern Zetasizer Nano ZS). Bottlebrush size distributions are shown in Figure S3.
Electrophoretic mobility measured with 100 mg L–1 of polymer solution at pH 6.5 with 10 mM NaCl (Malvern Zetasizer Nano ZS).
Apparent zeta potentials were calculated from the mobility using the Smoluchowski model.