Ionic Conductivity of Chain Extension Supramolecular Polymer Material based on Reactive Hydrogen Bonding Motif

Abstract

Abstract

Self-assembly of low molecular weight oligomers possessing good mechanical properties at room temperature and having a low melt viscosity at elevated temperatures are of interest for many applications, such as hot melts and thermoplastic elastomers. Association between end groups can be based on a variety of secondary interactions, such as Vander Waals, hydrophobic, ionic interactions, or hydrogen bonding. A low molecular weight poly (ethylene glycol) (PEG) was functionalized with 2-Ureido-4[1H] pyrimidinone (UPy) functional groups at both ends and their chemical structure as well as the material properties were studied. The chain extension telechelic polymer was characterized by FTIR, ¹H NMR spectral studies. The rheological studies revealed that the supramolecular structure of poly (ethylene glycol) is stable upon heating upto 90⁰C. In these polymers, blend with LiClO₄ and its conductivity was measured by Electronic impedance spectroscopy. Self-assembly polymers having relatively weak association in combination with crystallization leads to physical cross links, which result in materials with improved properties.

Keywords: Supramolecular polymer, hydrogen bonding, elastomers