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Proton conducting elastomers : Preparation & Characterisation

Olsson, Joel LU and Dahlqvist, John LU (2015) KTE720 20151
Centre for Analysis and Synthesis
Abstract
Herein a method for sulfonation of EPDM is described. This thesis aimed to prepare ion conducting elastomer films for use as corrosion inhibiting materials. To achieve ion conductivity, vulcanised samples were swelled in 1,2-dichloroethane and sulfonated using trimethylsilyl chlorosulfonate as sulfonating agent. Changes in mechanical, thermal and ion conductive properties were assessed. Sulfonated samples showed an increased storage modulus of up to one decade at room temperature. The thermal stability was affected by modification; loss of functionality and polymer degradation occurred already at 175 °C. A maximum ion conductivity of 13 mS cm-1 was obtained for a 20% crosslinked sample, with an ion exchange capacity of 0.66 meq g-1 and a... (More)
Herein a method for sulfonation of EPDM is described. This thesis aimed to prepare ion conducting elastomer films for use as corrosion inhibiting materials. To achieve ion conductivity, vulcanised samples were swelled in 1,2-dichloroethane and sulfonated using trimethylsilyl chlorosulfonate as sulfonating agent. Changes in mechanical, thermal and ion conductive properties were assessed. Sulfonated samples showed an increased storage modulus of up to one decade at room temperature. The thermal stability was affected by modification; loss of functionality and polymer degradation occurred already at 175 °C. A maximum ion conductivity of 13 mS cm-1 was obtained for a 20% crosslinked sample, with an ion exchange capacity of 0.66 meq g-1 and a water uptake of 24%. (Less)
Popular Abstract (Swedish)
Häri beskrivs en metod för sulfonering av EPDM. Detta examensarbete syftade till att tillverka jonledande, elastomera filmer för korrosionshämmande packningsmaterial. För att uppnå jonledning svälldes vulkaniserade prover i 1,2-dikloretan innan sulfonering med trimetylsilyl klorsulfonat som sulfoneringsagent. Förändringar i mekaniska och termiska egenskaper utvärderades, samtidigt som jonledning studerades. För sulfonerade prover ökade lagringsmodulen i rumstemperatur med upp till en dekad. Förlust av funktionalitet och nedbrytning av polymeren inleddes redan vid 175 °C. En maximal jonledning på 13 mS cm-1 erhölls för ett 20% tvärbundet prov, med en jonbyteskapacitet på 0.66 meq g-1 och ett vattenupptag på 24%.
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author
Olsson, Joel LU and Dahlqvist, John LU
supervisor
organization
course
KTE720 20151
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Elastomer, EPDM, Sulfonation, Ion, Conductive, Mechanical, Thermal, TGA, DSC, DMA, TMSCS, Trimethylsilyl chlorosulfonate, Polymer Technology
language
English
id
7366127
date added to LUP
2024-02-28 14:31:28
date last changed
2024-02-28 14:31:28
@misc{7366127,
  abstract     = {{Herein a method for sulfonation of EPDM is described. This thesis aimed to prepare ion conducting elastomer films for use as corrosion inhibiting materials. To achieve ion conductivity, vulcanised samples were swelled in 1,2-dichloroethane and sulfonated using trimethylsilyl chlorosulfonate as sulfonating agent. Changes in mechanical, thermal and ion conductive properties were assessed. Sulfonated samples showed an increased storage modulus of up to one decade at room temperature. The thermal stability was affected by modification; loss of functionality and polymer degradation occurred already at 175 °C. A maximum ion conductivity of 13 mS cm-1 was obtained for a 20% crosslinked sample, with an ion exchange capacity of 0.66 meq g-1 and a water uptake of 24%.}},
  author       = {{Olsson, Joel and Dahlqvist, John}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Proton conducting elastomers : Preparation & Characterisation}},
  year         = {{2015}},
}