| Literature DB >> 22121033 |
Meta M Bloksma1, Renzo M Paulus, Huub P C van Kuringen, Friso van der Woerdt, Hanneke M L Lambermont-Thijs, Ulrich S Schubert, Richard Hoogenboom.
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).Entities:
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Year: 2011 PMID： 22121033 DOI： 10.1002/marc.201100587
Source DB: PubMed Journal: Macromol Rapid Commun ISSN： 1022-1336 Impact factor: 5.734