One‐pot synthesis of 2‐phenyl‐2‐oxazoline‐containing quasi‐diblock copoly(2‐oxazoline)s under microwave irradiation

Abstract

The microwave‐assisted statistical copolymerization of 2‐phenyl‐2‐oxazoline with 2‐methyl‐2‐oxazoline or 2‐ethyl‐2‐oxazoline is discussed in this contribution. Kinetic studies of these statistical copolymerizations as well as reactivity ratio determinations were performed to investigate the monomer distribution in these copoly(2‐oxazoline)s, demonstrating the formation of quasi‐diblock copolymers. In addition, the synthesis of copolymer series with monomer concentrations ranging from 0 to 100 mol % is described. These copolymer series were characterized with 1H NMR spectroscopy, gas chromatography, and gel permeation chromatography. Moreover, the glass‐transition temperatures and solubility of these copolymers were studied, and this revealing better mixing of poly(2‐methyl‐2‐oxazoline) (pMeOx) with poly(2‐phenyl‐2‐oxazoline) (pPhOx) than poly(2‐ethyl‐2‐oxazoline) (pEtOx) with poly(2‐phenyl‐2‐oxazoline) (pPhOx). © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 416–422, 2007.

Design Strategies for Functionalized Poly(2-oxazoline)s and Derived Materials

“…Regarding the pronouncedly different polymerization rates of alkyl-substituted 2-oxazolines and their aromatic counterparts, Schubert and co-workers studied the kinetics and reactivity ratios of statistical microwave-assisted copolymerizations of PhOx with either MeOx or EtOx [162]. The formation of quasi-diblock copoly(2-oxazoline)s was proven.…”

Poly(2‐oxazoline)s as Smart Bioinspired Polymers

“…[55,63] A quasi-block copolyoxazoline was obtained from the copolymerization of 2-ethyl-2-oxazoline and 2-phenyl-2-oxazoline under microwave irradiation. [58] This way, by choosing the proper comonomer system, it is possible to design copolymers with adjusted bulk properties (glass transition temperature, surface properties, morphology) [64] or thermo-sensitivity (cloud point). [56,59,61,62] A strictly alternating, degradable amino-ester type copolymer could be prepared from the copolymerization of an equimolar mixture of 2-oxazoline (R ¼ H) and b-propiolactone.…”

Microwave‐assisted chemical synthesis of conducting polyindole: Study of electrical property using Schottky junction

“…spiroorthoester, phenyl oxazoline, polymers (poly 9,9-dihexylfluorene, polyesters), and polymer composites/copolymers. [8][9][10] On the other hand, with the advent of conducting polymers, the researchers are exploring the potential of these materials as a substitute of conventional inorganic semiconductors in area of Additional Supporting Information may be found in the online version of this article. sensors, catalysis, optoelectronic devices mostly due to their magnetic, optical, and electronic properties, which are analogous to metals while retaining the processability and flexibility of conventional polymers.…”