DLS measurements were performed on a Zetasizer Nano ZS (Malvern Panalytical GmbH, Kassel, Germany) with a 633 nm HeNe-laser at 173°. Autocorrelations for each sample were obtained 3 times for 40 seconds and results are presented as mean. Prior to the measurements, all samples (polymer = 10 g/L) were diluted 1/5 (v/v) with ultrapure H 2 O to polymer = 2 g/L. The samples were measured unfiltered in quartz cuvettes (d = 10 mm, QS, Hellma) at 25 °C.