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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04008naa a2200433 4500 | |
| 001 | oai:DiVA.org:umu-223557 | |
| 003 | SwePub | |
| 008 | 240419s1992 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-2235572 URI |
| 024 | 7 | a https://doi.org/10.1016/0167-2738(92)90288-z2 DOI |
| 040 | a (SwePub)umu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Albinsson, I.u Department of Physics, Chalmers University of Technology, Gothenburg, Sweden4 aut |
| 245 | 1 0 | a Ion association effects and ionic conduction in polyalkalene modified polydimethylsiloxanes |
| 264 | 1 | b Elsevier,c 1992 |
| 338 | a print2 rdacarrier | |
| 500 | a Conference proceedings published in the journal Solid State Ionics, volumes 53-56 (1992) but also as a monograph (Solid State Ionics -91) by North-Holland, Amsterdam (1992). | |
| 520 | a Poly (ethylene oxide) and poly (propylene oxide) modified poly (dimethyl siloxane) (PDMS) have been complexed with LiCF3SO3, NaCF3SO3 and KCF3SO3. In order to study ion association in these systems, the nondegenerate symmetric stretch (A1, SO3) Raman modes have been studied as a function of temperature at several different salt concentrations. Ionic conductivity has also been measured. For the poly (ethylene oxide) modified PDMS (PEO-PDMS), ether oxygen to metal ratios ranged from 12500:1 to 9:1. Changing the cation from Li+ to Na+ to K+ increases the conductivity of the complex. Plots of the molar conductivity versus salt concentration show that the characteristic shape and the region of increase in the molar conductivity is influenced most by the fraction of “free” ions which increases with increasing salt concentration. Charged triplets and contact ion-pairs are also present at the higher salt concentrations; the number of triplets increases with concentration and temperature. Non-VTF behaviour is observed. For the poly (propylene oxide) modified PDMS (PPO-PDMS) (with excess PPO), phase separation is observed when these triflate salts are complexed in. These solutions above and below the boundary layer have been studied by Raman spectroscopy revealing that the upper region is siloxane rich. The formation of the boundary layer is attributed to an increasing difference in surface tension between the PPO/salt/PPO-PDMS complexes and the separate PPO, PPO-PDMS components. The boundary layer moves up with increase in salt concentration. There is evidence of “free” ions, contact-ion pairs, triplets and aggregates. Values of conductivity of 2.2×10−6 and 1.6×10−5 S/cm are quoted for 293 K and 8 mol% LiCF3SO3 in respectively PPO-PDMS/PPO and PEO-PDMS/PEO. Both are better conductors than the corresponding 8 mol% PPG4000/LiCF3SO3 complex. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Den kondenserade materiens fysik0 (SwePub)103042 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Condensed Matter Physics0 (SwePub)103042 hsv//eng |
| 653 | a Raman scattering | |
| 653 | a ionic conductivity | |
| 653 | a poly(dimethyl siloxane) | |
| 653 | a poly(ethylene oxide) | |
| 653 | a poly(propylene oxide) | |
| 653 | a LiCF3SO3 | |
| 653 | a NaCF3SO3 | |
| 653 | a KCF3SO3 | |
| 653 | a alkali triflate salts | |
| 700 | 1 | a Jacobsson, Peru Department of Physics, Chalmers University of Technology, Gothenburg, Sweden4 aut |
| 700 | 1 | a Mellander, Bengt-Eriku Department of Physics, Chalmers University of Technology, Gothenburg, Sweden4 aut |
| 700 | 1 | a Stevens, James R.u Department of Physics, Chalmers University of Technology, Gothenburg, Sweden4 aut |
| 710 | 2 | a Department of Physics, Chalmers University of Technology, Gothenburg, Sweden4 org |
| 773 | 0 | t Solid State Ionicsd : Elsevierg 53-56:Part 2, s. 1044-1053q 53-56:Part 2<1044-1053x 0167-2738x 1872-7689 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-223557 |
| 856 | 4 8 | u https://doi.org/10.1016/0167-2738(92)90288-z |
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