Universität zu Köln

Bose, Ranjita K., Hohlbein, Nico, Garcia, Santiago J., Schmidt, Annette M. and van der Zwaag, Sybrand (2015). Connecting supramolecular bond lifetime and network mobility for scratch healing in poly(butyl acrylate) ionomers containing sodium, zinc and cobalt. Phys. Chem. Chem. Phys., 17 (3). S. 1697 - 1705. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1463-9084

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Abstract

In this work, we correlate network dynamics, supramolecular reversibility and the macroscopic surface scratch healing behavior for a series of elastomeric ionomers based on an amorphous backbone with varying fractions of carboxylate pendant groups completely neutralized by Na+, Zn2+ or Co2+ as the counter ions. Our results based on temperature dependent dynamic rheology with simultaneous FTIR analysis clearly indicate that the effective supramolecular bond lifetime (tau(b)) is an important parameter to ascertain the ideal range of viscoelasticity for good macroscopic healing. The reversible coordination increased with higher valence metal ions and ionic content. Both rheological and spectroscopic analyses show a decrease in supramolecular assembly with temperature. The temperature dependent tb was used to calculate the activation energy (E-a) of dissociation for the ionic clusters. According to self-healing experiments based on macroscale surface scratching, a supramolecular bond lifetime between 10 and 100 s results in samples with complete surface scratch healing and good mechanical robustness.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bose, Ranjita K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hohlbein, Nico UNSPECIFIED UNSPECIFIED UNSPECIFIED Garcia, Santiago J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, Annette M. UNSPECIFIED UNSPECIFIED UNSPECIFIED van der Zwaag, Sybrand UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-419638
DOI:	10.1039/c4cp04015e
Journal or Publication Title:	Phys. Chem. Chem. Phys.
Volume:	17
Number:	3
Page Range:	S. 1697 - 1705
Date:	2015
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	1463-9084
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language METHACRYLIC ACID IONOMER; POLYMER NETWORKS; MECHANICAL-PROPERTIES; GLASS TRANSITIONS; BEHAVIOR; DYNAMICS; GELS Multiple languages Chemistry, Physical; Physics, Atomic, Molecular & Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41963