Vinyltriethoxysilane

Vinyltriethoxysilane
Names
	Preferred IUPAC name Ethenyltri(ethoxy)silane
	Other names Triethoxyvinylsilane
Identifiers
CAS Number	78-08-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	6269;
ECHA InfoCard	100.000.984
PubChem CID	6516;
UNII	8V1TKX755V ;
CompTox Dashboard (EPA)	DTXSID3044463 ;
	InChI InChI=1S/C8H18O3Si/c1-5-9-12(8-4,10-6-2)11-7-3/h8H,4-7H2,1-3H3 Key: FWDBOZPQNFPOLF-UHFFFAOYSA-N;
	SMILES CCO[Si](C=C)(OCC)OCC;
Properties
Chemical formula	C8H18O3Si
Molar mass	190.31
Appearance	Colorless liquid
Density	0.903 g/cm3
Boiling point	160–161 °C (320–322 °F; 433–434 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Vinyltriethoxysilane is an organosilicon compound with the formula (C₂H₅O)₃SiCH=CH₂. It is a colorless liquid. The compound is bifunctional, featuring both a vinyl group and hydrolytically sensitive ethoxysilyl groups. As such it is a crosslinking agent.^[1]

Applications

Vinyltriethoxysilane and the related vinyltrimethoxysilane are used as monomers and comonomer for polymers such as ethylene-vinyltrimethoxysilane and ethylene-vinyl acetate-vinyltrimethoxysilane. Vinyltrialkoxysilanes are also used as cross-linking agents during the manufacture of cross-linked polyethylene (PEX). The alkoxysilane moiety is reactive toward water, and in the presence of moisture, it forms silicon-oxygen-silicon bonds that cross-link the material to cure it. Moisture-curable polymers are used as electrical insulation in some kinds of cables and for water pipe in under-floor heating installations.

Vinyltrialkoxysilanes are also used as a coupling agents or adhesion promoters for treatment of glass fibers and particulate minerals in order to form stronger bonds with resin and produce fiberglass with better mechanical properties. Amino-functional silanes such as (3-aminopropyl)triethoxysilane and epoxy-functional silanes are used for the same purpose. The silane group attaches to the glass substrate via covalent Si-O-Si bond, while the resin reacts with the vinyl-, amino-, or epoxy- group and binds to it.

References

^ Wolff, Siegfried (1996). "Chemical Aspects of Rubber Reinforcement by Fillers". Rubber Chemistry and Technology. 69 (3): 325–346. doi:10.5254/1.3538376.

[1] Wolff, Siegfried (1996). "Chemical Aspects of Rubber Reinforcement by Fillers". Rubber Chemistry and Technology. 69 (3): 325–346. doi:10.5254/1.3538376.

[1]