Title

Thermal, Mechanical, and Conductive Properties of Imidazolium-Containing Thiol-Ene Photopolymerized Networks

List all Project Mentors & Advisor(s)

Dr. Kevin M. Miller

Second Project Mentor & Advisor(s)

Dr. Jeff Osborne

Presentation Format

Event

Abstract/Description

Thiol-ene "click" chemistry is a rapid radical mediated process between readily available thiol, -SH, and an alkene, C=C, that can be done in mild solvent conditions. Ionic liquids are poorly coordinated salts with low melting points that exhibit properties like low toxicity profiles, reduced volatility, low flammability and the ability to dissolve aqueous and organic-soluble materials. Poly(ionic liquid)s are polymerizable ionic liquids that combine the unique thermal, mechanical and electrochemical properties of ionic liquids while restraining the cationic or anionic center within the repeating unit of the polymer chain. In this study we used the poly(ionic liquid) 1,3-diallylimidazolium bis(trifluoromethylsulfonyl)imide was prepared along with pentaerythritol tetrakis(3-mercaptopropionate) in five different molar ratios to investigate the differences in thermal, mechanical and electrochemical properties in order to determine optimal crosslink density. It was found that the 1.0:2.0 network exhibited the highest glass transition temperature and storage modulus. The 1.0:3.0 network exhibited the highest conductivity.

Location

Barkley Room, Curris Center

Start Date

April 2016

End Date

April 2016

Affiliations

Honors Thesis

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Apr 21st, 12:30 PM Apr 21st, 1:30 PM

Thermal, Mechanical, and Conductive Properties of Imidazolium-Containing Thiol-Ene Photopolymerized Networks

Barkley Room, Curris Center

Thiol-ene "click" chemistry is a rapid radical mediated process between readily available thiol, -SH, and an alkene, C=C, that can be done in mild solvent conditions. Ionic liquids are poorly coordinated salts with low melting points that exhibit properties like low toxicity profiles, reduced volatility, low flammability and the ability to dissolve aqueous and organic-soluble materials. Poly(ionic liquid)s are polymerizable ionic liquids that combine the unique thermal, mechanical and electrochemical properties of ionic liquids while restraining the cationic or anionic center within the repeating unit of the polymer chain. In this study we used the poly(ionic liquid) 1,3-diallylimidazolium bis(trifluoromethylsulfonyl)imide was prepared along with pentaerythritol tetrakis(3-mercaptopropionate) in five different molar ratios to investigate the differences in thermal, mechanical and electrochemical properties in order to determine optimal crosslink density. It was found that the 1.0:2.0 network exhibited the highest glass transition temperature and storage modulus. The 1.0:3.0 network exhibited the highest conductivity.