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Modification of Silicone Elastomers Using Silicone Comonomers Containing Hydrophilic Surface Active Endgroups

Published online by Cambridge University Press:  07 January 2014

Jonathan Goff ,
Barry Arkles  and
Santy Sulaiman
Jonathan Goff
Affiliation:
Gelest Inc, 11 E Steel Road, Morrisville, PA 16067, U.S.A.
Barry Arkles
Affiliation:
Gelest Inc, 11 E Steel Road, Morrisville, PA 16067, U.S.A.
Santy Sulaiman
Affiliation:
Gelest Inc, 11 E Steel Road, Morrisville, PA 16067, U.S.A.
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Abstract

A facile technique was developed for a long-term increase in silicone elastomer surface hydrophilicity, eliminating the need for post-cure surface treatment (e.g. oxygen plasma or surface grafting). Well-defined silicones (1-4 kDa) with a central vinyl functionality and discrete PEG2, PEG3 and tetrahydrofurfuryl (THF) pendant endgroups were synthesized, characterized and used as comonomers in addition-cure, platinum catalyzed 2-part silicone elastomer formulations. The modified silicone elastomers were optically clear and maintained the mechanical performance characteristic of this class of material with up to 20 wt.% comonomer in the 2-part formulation. Contact angle measurements of deionized water on the silicone elastomer surface showed improved wettability with comonomer content. The elastomer surface shifted from hydrophobic (contact angle ∼120°C) to hydrophilic (contact angle < 90°C) at ∼5 wt.% comonomer loadings for extended time frames (> 5 months). Coefficient of friction measurements of the modified silicone elastomers revealed an increase in surface lubricity with comonomer loadings.

Keywords

polymersurface chemistrybiomaterial
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1626: Symposium K – Adaptive Soft Matter through Molecular Networks , 2014 , mrsf13-1626-k11-07
Copyright
Copyright © Materials Research Society 2014 

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References

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