Thermoresponsive Poly(2-oxazoline) Molecular Brushes by Living Ionic Polymerization: Kinetic Investigations of Pendant Chain Grafting and Cloud Point Modulation by Backbone and Side Chain Length Variation
作者： Ning Zhang , Robert Luxenhofer , Rainer Jordan
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摘要: Molecular brushes of poly(2-oxazoline)s were prepared by living anionic polymerization 2-iso-propenyl-2-oxazoline to form the backbone and subsequent cationic ring-opening 2- n - or iso -propyl-2-oxazoline for pendant chain grafting. In situ kinetic studies indicate that initiation effi ciency rates are independent from number initiator functions per molecule. This was attributed high oxazolinium salt stretched conformation backbone, which is caused electrostatic repulsion moieties along macroinitiator. The resulting molecular showed thermoresponsive properties, is, having a defi ned cloud point (CP). dependence CP as function side length well concentration studied.
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