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Issue 43, 2011
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Water uptake of poly(2-N-alkyl-2-oxazoline)s: influence of crystallinity and hydrogen-bonding on the mechanical properties

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Abstract

Poly(2-oxazoline)s are suitable materials to study structure–property relationships as their preparation by a living cationic ring-opening polymerization procedure and the relatively facile monomer synthesis allow accurate control over the molecular structure. In this contribution, the number of carbon atoms in the linear side-chain is systematically varied from a short methyl- to a long nonyl-group. As some of the materials are known to be hygroscopic, the effect of water uptake on the mechanical properties is investigated in detail. The combination of water uptake measurements, FT-IR spectroscopy and indentation revealed that only the samples with very short side-chains show significant hygroscopicity, while samples with longer side-chains exhibit crystalline behavior. Furthermore, depending on the polymer structure, it could be differentiated between side-chain and main-chain crystallinity.

Graphical abstract: Water uptake of poly(2-N-alkyl-2-oxazoline)s: influence of crystallinity and hydrogen-bonding on the mechanical properties

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Article information


Submitted
03 Jun 2011
Accepted
15 Aug 2011
First published
04 Oct 2011

J. Mater. Chem., 2011,21, 17331-17337
Article type
Paper

Water uptake of poly(2-N-alkyl-2-oxazoline)s: influence of crystallinity and hydrogen-bonding on the mechanical properties

E. F.-J. Rettler, H. M. L. Lambermont-Thijs, J. M. Kranenburg, R. Hoogenboom, M. V. Unger, H. W. Siesler and U. S. Schubert, J. Mater. Chem., 2011, 21, 17331
DOI: 10.1039/C1JM12541A

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