Mingyi silicone（anhui）co,.ltd
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In the rapidly evolving landscape of material science, Dimethylvinyl ethoxy silane (IOTA DVES) stands as a pivotal intermediate. Known as a "Vinyl End-Capper," this organosilicon monomer (CAS No. 5356-83-2) plays a decisive role in the precision synthesis of specialty silicones. As industries shift toward more durable, heat-resistant, and chemically stable materials, the purity and performance of intermediates like IOTA DVES have become the gold standard for innovation in the automotive, electronics, and aerospace sectors.
The chemical formula (CH_3)_2C_2H_3SiOC_2H_5 reveals the balanced engineering of IOTA DVES. It possesses a singular silicon atom bonded to two methyl groups, one vinyl group, and one ethoxy group. This specific arrangement provides a bimodal reactivity profile:
The Vinyl Functionality: Provides a site for hydrosilylation reactions (addition curing) or radical polymerization. This is essential for creating elastomers that require high mechanical integrity.
The Ethoxy Functionality: Acts as the "anchor." Upon hydrolysis, it releases ethanol and forms silanols, which can further react with inorganic substrates or other siloxane chains via condensation.
With a high vinyl content of 22% and a high purity of 99.5%, IOTA DVES ensures that chemical reactions proceed predictably, minimizing unwanted side reactions that could compromise the final product's clarity or stability.
A. Precision End-Capping in Polysiloxane Synthesis
In the production of vinyl-terminated polydimethylsiloxane (Vinyl Fluid), IOTA DVES is used to "cap" the ends of the polymer chains. This is not merely a termination step; it is a customization step. By adjusting the ratio of DVES to the siloxane backbone, manufacturers can precisely dial in the desired viscosity. This is critical for Liquid Silicone Rubber (LSR) injection molding, where flowability and cure speed are paramount.
B. Surface Functionalization of Nanoparticles
As nanotechnology advances, the surface modification of silica nanoparticles, carbon nanotubes, and metallic oxides has become essential. IOTA DVES acts as a superior surface modifier. The ethoxy group reacts with the surface hydroxyl groups ($M-OH$), creating a hydrophobic vinyl-functional layer. This prevents particle agglomeration and ensures that the fillers become an integral, covalently bonded part of the polymer matrix, significantly enhancing the composite's tensile strength.
C. Hybrid Polymer Coatings
Modern coatings demand more than just color. They require UV resistance, scratch resistance, and moisture repellency. IOTA DVES is increasingly used to synthesize silicone-acrylic or silicone-epoxy hybrids. These hybrid resins combine the cost-effectiveness and adhesion of organic polymers with the legendary durability of silicones.
At IOTA, we understand that for high-tech applications, even trace impurities can lead to failure. Our DVES is produced under stringent vacuum distillation conditions.
Boiling Point Stability: With a narrow boiling range (93°C-99°C), our product exhibits excellent thermal consistency.
Optical Clarity: A refractive index of 1.3983 ensures that when used in LED or optical-grade encapsulants, the light transmission remains unimpaired.
Density & Volatility: At $0.790 , g/cm^3$ and a vapor pressure of $44.8 , mmHg$, it is easy to handle in standard industrial reactors.
IOTA DVES is a flammable and moisture-sensitive liquid. To maintain its $99%$ purity, users should adhere to the following:
Nitrogen Blanketing: Containers should be purged with dry nitrogen after every use to prevent hydrolysis caused by atmospheric moisture.
Temperature Control: Store in a cool, well-ventilated area away from oxidizing agents and open flames.
Safety Protocols: Always wear chemical-resistant gloves and goggles. In case of contact, the ethoxy group may release ethanol upon hydrolysis, so adequate ventilation is required.
Choosing IOTA DVES means choosing a foundation of quality for your silicone formulations. Whether you are developing low-volatility components for automotive sensors or high-strength fillers for industrial sealants, our vinyl end-capper provides the reliability and reactivity your project demands.
