Ionic configurations in PEO based electrolytes endcapped by CH3-, OH- and SO3-groups

Self-assembly of physically crosslinked micelles of poly(2-acrylamido-2-methyl-1-propane sulphonic acid-co-isodecyl methacrylate)-copper(II) complexes

“…The glass transition temperature showed slight changes with the incorporation of Cu 2+ ions to the polymers and the polycomplexes exhibited also a single glass transition. A different behaviour was observed for AMPS co (20), the glass transition temperature increases from 82°C to 121°C by metal complex formation. Metallic ions may act as crosslinkers between polymer chains, reducing the segmental mobility and changing physical properties (increasing T g ).…”

“…Increasing the AMPS content in the copolymer led to a slight increase on the temperature decomposition. However, two decomposition stages at lower temperatures were observed for AMPS co (20) at 274 and 329°C, probably due to the lower molecular weight and higher polydispersity compared to those of the copolymers AMPS co (11) and (30).…”

“…The relatively high T g in the random copolymers are due to the amide and sulphonic groups attached to the backbone of the polymers facilitating entanglement of the polymer chains. As the i-DMA hydrophobic content increased T g decreased and an exceptional low value of T g was found for AMPS co (20) due to its lower molecular weight and higher polydispersity. The glass transition temperature showed slight changes with the incorporation of Cu 2+ ions to the polymers and the polycomplexes exhibited also a single glass transition.…”

“…This fact can be explained since the AMPS carbonyl moiety is located on the same chain as the ligand binding site. The sharp peak at 1040 cm À1 was assigned to the SO À 3 , symmetric stretch, which is known to exhibit narrow bands in other complexes [20], while (amorphous) polymer modes are generally much broader. The decrease of the intensity of the band at 1040 cm À1 associated to SO À 3 group also confirmed the interaction between sulphonic moieties and Cu 2+ ions and the involvement of this moiety as one of the coordination groups.…”

Transport Property and Raman Spectroscopic Studies of the Polymer Electrolyte System P ( EO ) n ‐ NaTFSI

“…44 T orell and coworkers have recently used this approach to calculate the fraction of "free" (or solvated) cations in electrolytes based on PEO complexed with MCF 3 S0 3 salts (M=Na or Li). 45 Figure 9 shows Raman spectra of the region 700-900 em•\ including the 8 5 (CF 3 ) Raman mode at -741 cm• 1 and the oxygen-sodium ion (0-Na) ring breathing mode at -865 cm• 1 , for polymer salt complexes corresponding to compositions of O:Na=60:1, 15:1 and 7:1, respectively. The spectrum of the pure PEO host matrix is also included.…”