Reactivity of Polysilazanes Allows Catalyst free Curing of Silicones

René Sønderbæk‐Jørgensen, Sebastian Meier, Kim Dam‐Johansen, Anne L. Skov, Anders E. Daugaard*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

48 Downloads (Pure)


Silicones are typically cured at room temperature by means of metal catalyst such as tin or platinum. When networks are formed the catalyst become unrecoverable, which is of economic as well as environmental concern. Very few methods for producing metal catalyst-free room-temperature vulcanised (RTV) silicones exist and require conditions unavailable in industrial settings. Through the study of organic polysilazane (PSz) reactivity with simple alcohols by NMR, we discovered an unexpected fragmentation preference for breaking the Si-N bond rather than the Si-H; thereby, casting a new light on the fragmentation mechanism of polysilazanes. Utilising the polysilazane fragmentation as a silyl ether coupling agent for multifunctional carbinol silicones, we present a method of producing catalyst free RTV silicone networks at ambient conditions. These silicone networks were proven chemically similar to a standard condensation cured silicone and stoichiometric variations of PSz content demonstrated adjustable network properties.
Original languageEnglish
Article number2200157
JournalMacromolecular Materials and Engineering
Number of pages7
Publication statusPublished - 2022


Dive into the research topics of 'Reactivity of Polysilazanes Allows Catalyst free Curing of Silicones'. Together they form a unique fingerprint.

Cite this