Vinyl
Functionality
Vinyl-functional silicone polymers or intermediates provide carbon–carbon double bonds.
Technical Resource · Silicone Elastomers & Crosslinking
How Hydrosilylation Works in Silicone Chemistry
Understanding the reaction between Si–H and vinyl functionality and the roles of DVTMDS and TMDS in organosilicon synthesis.
Si–H
Hydrosilane
Functionality
C=C
Vinyl
Functionality
Suitable catalyst / hydrosilylation reaction
Si–C LINKAGE
Functional modification / Network formation
Introduction
What Is Hydrosilylation?
Hydrosilylation is an important reaction pathway in organosilicon chemistry. In a typical reaction, a silicon–hydrogen bond reacts with a carbon–carbon double bond in the presence of a suitable catalyst, forming a new silicon–carbon bond.
This chemistry is widely used in silicone synthesis, functional modification and addition-cure silicone systems.
Simplified reaction: Si–H + C=C → Si–C
Reaction Logic
How Hydrosilylation Supports Silicone Crosslinking
Vinyl
Si–H
Functionality
Hydride-functional silicones or siloxanes provide reactive Si–H groups.
Catalyst-Assisted Reaction
The Si–H groups react with compatible unsaturated groups under suitable catalytic conditions.
Network
Formation
When multifunctional materials are used, repeated reactions can build a crosslinked silicone network.
Functional Intermediates
DVTMDS vs TMDS
Vinyl-Functional Siloxane
DVTMDS —
Divinyltetramethyldisiloxane
CAS 2627-95-4
Provides terminal vinyl functionality for hydrosilylation chemistry, organosilicon synthesis and functional modification.
Vinyl / C=C
Reactive Intermediate
Hydrosilylation
Si–H Functional Siloxane
TMDS — 1,1,3,3-Tetramethyldisiloxane
CAS 3277-26-7
Provides reactive Si–H functionality for hydrosilylation, organosilicon synthesis and specialty modification reactions.
Si–H
Reactive Intermediate
| Functional Intermediate | Main Reactive Functionality | Role in Hydrosilylation |
|---|---|---|
| DVTMDS | Vinyl / C=C | Provides unsaturated functionality |
| TMDS | Si–H | Provides hydrosilane functionality |
| HMDSO | No vinyl or Si–H reactive group | Used as a different type of siloxane intermediate |
Performance Factors
Factors That Influence Hydrosilylation Performance
Functional Group Content
Stoichiometric Balance
Catalyst System
Raw Material
Purity
Moisture & Contamination
The complete formulation matters: polymer structure, functionality, molecular weight, catalyst system, stoichiometry and curing conditions all influence final performance.
Recommended Products
Functional Siloxanes for Evaluation
Vinyl-Functional
DVTMDS
A high-purity vinyl-functional siloxane intermediate for hydrosilylation chemistry, organosilicon synthesis and functional silicone material development.
View DVTMDS →Si–H Functional
TMDS
A reactive Si–H-containing siloxane intermediate used in hydrosilylation reactions, synthesis and functional modification.
View TMDS →Disiloxane
HMDSO
A low-viscosity disiloxane used in specialty organosilicon processing and synthesis applications.
View HMDSO →Technical Support
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