Abstract
Dielectric properties of ionic networks formed from the supramolecular assembly of amine and carboxy functionalised polymers were measured and analyzed.
Highlights
A supramolecular structure arises as a result of reversible, noncovalent interactions between polymer chains or units on polymer chains
Before applying frequency sweep steps, each sample was tested at the starting and nal temperature to determine the range of its linear viscoelastic response (LVR)
The dielectric properties of a family of supramolecular ionic networks have been characterised by dielectric relaxation spectroscopy (DRS)
Summary
A supramolecular structure arises as a result of reversible, noncovalent interactions between polymer chains or units on polymer chains. The reaction between a diamine such as HMDA and telechelic carboxylic acids causes the formation of – in ideal cases and with stoichiometric ratios – one long supramolecular polymer, while the reaction between multifunctional amines such as TAEA and PPI dendrimers and carboxylic acid end-functionalised PEGs (e.g. DiCOOH-PEGs) lead to supramolecular ionic networks.[2] The proton transfer reaction from the carboxylic acid groups to the amino groups is a simple and fast way to prepare supramolecular ionic structures These ionic structures, derived from ionic assembly between so-called Jeffamine polyetheramines and several multifunctional carboxylic acids such as citric acid (CA), tricarballylic acid (TCAA), trimesic acid (TMA), ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DETPA) (Fig. 2), were investigated in relation to some of the multiple variables in a simple system. The ionic networks (entries [13–19], Table 1) were prepared by manual mixing -followed by magnetically stirring stoichiometric amounts of
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