Reversible Dynamic Behavior of Condensation‐Cured Silicone Elastomers Caused by a Catalyst

This study demonstrates that dibutyltin‐dilaurate (DBTL), commonly used to catalyze condensation‐cured silicone elastomers, causes dynamic behavior in the silicone network, which is attributed to the catalyst finding a way to become part of the elastomer network. Furthermore, it establishes that by...

Full description

Saved in:
Bibliographic Details
Published in:Macromolecular materials and engineering 2023-06, Vol.308 (6), p.n/a
Main Authors: Jurásková, Alena, Olsen, Stefan Møller, Skov, Anne Ladegaard
Format: Article
Language:English
Subjects:
Catalysts
condensation cure
Curing
Dibutyltin
dynamic networks
Elastomers
Investigations
NMR
Nuclear magnetic resonance
Polydimethylsiloxane
Polyesters
rheology
silicone elastomers
Silicones
tin catalysts
Viscoelasticity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study demonstrates that dibutyltin‐dilaurate (DBTL), commonly used to catalyze condensation‐cured silicone elastomers, causes dynamic behavior in the silicone network, which is attributed to the catalyst finding a way to become part of the elastomer network. Furthermore, it establishes that by choosing an appropriate silanol‐terminated polydimethylsiloxane (HO‐PDMS‐OH) chain length, the catalyst causes the gelation of the system without a cross‐linker. To the best of authors' knowledge, this is the first time that the DBTL catalyst is shown, apart from the catalytic effect, to have the ability to act as a cross‐linker. The concentration of the catalyst, dibutyltin dilaureate (DBTL),  is shown to influence the stress–strain properties of silicone elastomers strongly. Further investigation of this phenomenon indicates that DBTL has the ability to integrate into the silicone elastomer network and cause dynamic behavior of the elastomer. In addition, it is proven that DBTL enables the curing of a bifunctional polymer without the addition of a cross‐linker.
ISSN:1438-7492
1439-2054
DOI:10.1002/mame.202200615