Synthesis of Polymer Precursors NIPAM and NIPMAM

NIPAM (97%; Sigma-Aldrich, Munich, Germany)
and NIPMAM (97%; Sigma-Aldrich Munich, Germany) were recrystallized
from n-hexane. Acryloylchloride (98%; Sigma-Aldrich
Munich, Germany), n-propylamine (99%, Fluka; Buchs,
Switzerland), triethylamine (99%; Grüssing, Filsum, Germany),
dichloromethane (p.A.), ammonium persulfate (≥98%; Sigma-Aldrich
Munich, Germany), N,N′-methylenebisacrylamide
(99%; Sigma-Aldrich Munich, Germany), SDS (≥99%; Sigma-Aldrich
Munich, Germany), and SDeS (≥99%; Sigma-Aldrich Munich, Germany)
were used without purification. Water was purified using an Arium
pro VF system (Satorius Stedim Systems GmbH, Göttingen, Germany).
The synthesis of NnPAM was described elsewhere.^{29 (link),30 (link),37 (link)}