Functional silicone elastomers via novel siloxane copolymers and chain extenders

Frederikke Bahrt Madsen, Anders Egede Daugaard, Søren Hvilsted, Anne Ladegaard Skov

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Abstract

Functional silicone polymers and elastomers with altered/improved bulk and/or surface properties are highly desired to expand the application range even further. Novel functional silicone polymers and elastomers were prepared via two different methods. One method was through the synthesis of siloxane copolymers[1] (via the tris(pentafluorophenyl)borane catalysed Piers-Rubinsztajn reaction[2]), which allows for the attachment of functional molecules through copper-catalysed azide-alkyne 1,3-dipolar cycloaddition (CuAAC)[3]. The synthesised copolymers allow for a high degree of chemical freedom, as several parameters can be varied during the preparation phase. As an example, the space between the functional groups can be varied, by using different dimethylsiloxane spacer units between the functional molecules. Furthermore, the degree of functionalisation of the copolymers can be varied accurately by changing the feed of functional molecules. As a result, a completely tuneable elastomer system, with respect to functionalisation, is achieved. The second method of functionalising silicone elastomers involves the synthesis of a so-called ‘chain extender’ that allows for chemical modifications such as CuAAC. This route is promising as an easy-to-use additive to commercial RTV silicone elastomer systems. We have investigated how the different functionalisation variables affect elastomer properties including dielectric and viscoelastic properties.
Original languageEnglish
Publication date2015
Number of pages1
Publication statusPublished - 2015
EventTenth International Workshop on Silicon-Based Polymers - Centre Paul Langevin, Aussois , France
Duration: 26 Apr 201530 Apr 2015
http://ispo-2015.sciencesconf.org/

Workshop

WorkshopTenth International Workshop on Silicon-Based Polymers
LocationCentre Paul Langevin
CountryFrance
CityAussois
Period26/04/201530/04/2015
Internet address

Bibliographical note

Conference abstract

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