title: Thermoresponsive poly(2-oxazine)s.
abstract: The monomers 2-methyl-2-oxazine (MeOZI), 2-ethyl-2-oxazine (EtOZI), and 2-n-propyl-2-oxazine (nPropOZI) were synthesized and polymerized via the living cationic ring-opening polymerization (CROP) under microwave-assisted conditions. pEtOZI and pnPropOZI were found to be thermoresponsive, exhibiting LCST behavior in water and their cloud point temperatures (T(CP)) are lower than for poly(2-oxazoline)s with similar side chains. However, comparison of poly(2-oxazine) and poly(2-oxazoline)s isomers reveals that poly(2-oxazine)s are more water soluble, indicating that the side chain has a stronger impact on polymer solubility than the main chain. In conclusion, variations of both the side chains and the main chains of the poly(cyclic imino ether)s resulted in a series of distinct homopolymers with tunable T(CP).
authors: Laboratory of Macromolecular Chemistry and Nanoscience, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors: Meta M
authors: MM
authors: Bloksma
authors: Renzo M
authors: RM
authors: Paulus
authors: Huub P C
authors: HP
authors: van Kuringen
authors: Friso
authors: F
authors: van der Woerdt
authors: Hanneke M L
authors: HM
authors: Lambermont-Thijs
authors: Ulrich S
authors: US
authors: Schubert
authors: Richard
authors: R
authors: Hoogenboom
mesh_terms: D015394:Molecular Structure; D010078:Oxazines / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D012995:Solubility; D013696:Temperature
chemical_list: D010078:Oxazines; D011108:Polymers