In our ongoing efforts to develop poly(2‐oxazoline)s (POx) for biomedical applications, we report on the preparation of defined, star‐like hydrophilic POx. Using pluritriflate initiators, we show, through online kinetic measurements by gas chromatography, that multiple initiating groups are of equal reactivity for the initiation of the polymerization of 2‐oxazolines. The overall polymerization rate increases linearly with the number of initiator functions per molecule. Thus, all initiating moieties are of the same reactivity and all arms grow at the same rate. This is crucial for the establishment of a meaningful structure‐property relationship for polymers of star architectures.magnified image

Cover: Kinetic investigations on the polymerization of 2methyl-2-oxazoline with pluritriflate initiators showed that defined star-like poly(2-oxazoline)s with evenly propagating arms can be obtained. Further details can be found in the article by R. Luxenhofer, M. Bezen, and R. Jordan* on page 1509.