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Thermoresponsive Poly(2‐oxazine)s
Author(s) -
Bloksma Meta M.,
Paulus Renzo M.,
van Kuringen Huub P. C.,
van der Woerdt Friso,
LambermontThijs Hanneke M. L.,
Schubert Ulrich S.,
Hoogenboom Richard
Publication year - 2012
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100587
Subject(s) - lower critical solution temperature , cationic polymerization , side chain , cloud point , polymer chemistry , monomer , solubility , polymer , polymerization , ether , ring opening polymerization , oxazoline , chemistry , materials science , aqueous solution , organic chemistry , copolymer , catalysis
The monomers 2‐methyl‐2‐oxazine (MeOZI), 2‐ethyl‐2‐oxazine (EtOZI), and 2‐ n ‐propyl‐2‐oxazine ( n PropOZI) were synthesized and polymerized via the living cationic ring‐opening polymerization (CROP) under microwave‐assisted conditions. pEtOZI and p n PropOZI 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 .