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Polymers 2015, 7(10), 1998-2008; doi:10.3390/polym7101494

Thermal Properties of Methyl Ester-Containing Poly(2-oxazoline)s

1
Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium
2
Radboud University Nijmegen, Institute for Molecules and Materials (IMM), Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
*
Authors to whom correspondence should be addressed.
Academic Editor: Graeme Moad
Received: 13 August 2015 / Revised: 13 September 2015 / Accepted: 30 September 2015 / Published: 13 October 2015
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Abstract

This paper describes the synthesis and thermal properties in solution and bulk of poly(2-alkyl-oxazoline)s (PAOx) containing a methyl ester side chain. Homopolymers of 2-methoxycarbonylethyl-2-oxazoline (MestOx) and 2-methoxycarbonylpropyl-2-oxazoline (C3MestOx), as well as copolymers with 2-ethyl-2-oxazoline (EtOx) and 2-n-propyl-2-oxazoline (nPropOx), with systematic variations in composition were prepared. The investigation of the solution properties of these polymers revealed that the cloud point temperatures (TCPs) could be tuned in between 24 °C and 108 °C by variation of the PAOx composition. To the best of our knowledge, the TCPs of PMestOx and PC3MestOx are reported for the first time and they closely resemble the TCPs of PEtOx and PnPropOx, respectively, indicating similar hydrophilicity of the methyl ester and alkyl side chains. Furthermore, the thermal transitions and thermal stability of these polymers were investigated by DSC and TGA measurements, respectively, revealing amorphous polymers with glass transition temperatures between -1 °C and 54 °C that are thermally stable up to >300 °C. View Full-Text
Keywords: poly(2-oxazoline)s; copolymers; LCST; cloud point temperature; thermal properties; glass transition temperature poly(2-oxazoline)s; copolymers; LCST; cloud point temperature; thermal properties; glass transition temperature
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Bouten, P.J.M.; Lava, K.; van Hest, J.C.M.; Hoogenboom, R. Thermal Properties of Methyl Ester-Containing Poly(2-oxazoline)s. Polymers 2015, 7, 1998-2008.

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