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

Polymers

Petra J. M. Bouten²  Kathleen Lava²  Jan C. M. van Hest¹  Richard Hoogenboom² 

[1] Radboud University Nijmegen, Institute for Molecules and Materials (IMM), Heyendaalseweg 135, 6525 AJ Nijmegen, The NetherlandsSupramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium;

关键词: poly(2-oxazoline)s;    copolymers;    LCST;    cloud point temperature;    thermal properties;    glass transition temperature;   

DOI  :  10.3390/polym7101494

来源: mdpi

【 摘 要 】

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 (T_CPs) could be tuned in between 24 °C and 108 °C by variation of the PAOx composition. To the best of our knowledge, the T_CPs of PMestOx and PC3MestOx are reported for the first time and they closely resemble the T_CPs 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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.