Polysiloxanes di-Me, di-Ph vinyl group-terminated
[CAS# 68951-96-2]

Identification

• Classification: Chemical reagent >> Organic reagent >> Siloxane
• Name: Polysiloxanes di-Me, di-Ph vinyl group-terminated
• Molecular Weight: ~9300
• CAS Registry Number: 68951-96-2
• EC Number: 805-681-5

Properties

• Density: 1.036 g/mL (25 ºC)
• Index of Refraction: 1.465
• Boiling point: >400 ºC
• Flash point: >113 ºC (closed cup)

Discovory and Applicatios

Polysiloxanes di-Me, di-Ph vinyl group-terminated are a class of specialized silicone polymers that combine the unique properties of siloxane chemistry with the reactivity of vinyl groups at the polymer chain's terminus. These compounds feature a siloxane backbone (Si-O-Si) with methyl (Me) and phenyl (Ph) groups attached to the silicon atoms, and vinyl groups at the ends, which significantly influence the material's properties and its reactivity.

The discovery of polysiloxanes di-Me, di-Ph vinyl group-terminated stems from the desire to create materials that could be crosslinked or polymerized under specific conditions, leading to enhanced physical properties. The incorporation of vinyl groups at the polymer's terminal ends provides a reactive site that can participate in polymerization reactions, such as radical or addition polymerizations, allowing for the formation of more complex structures. The methyl groups contribute to the polymer's flexibility and hydrophobicity, while the phenyl groups increase rigidity, heat resistance, and optical properties.

The primary application of polysiloxanes di-Me, di-Ph vinyl group-terminated lies in the production of high-performance materials that require controlled crosslinking. These materials are widely used in the formulation of elastomers and coatings. The vinyl groups at the chain ends allow for crosslinking in the presence of suitable curing agents, such as peroxides or platinum catalysts. This crosslinking process results in enhanced mechanical properties, including increased elasticity, tensile strength, and resistance to wear and deformation, making these materials ideal for use in sealing and gasketing applications.

In addition to their role in elastomers and coatings, polysiloxanes di-Me, di-Ph vinyl group-terminated are employed in the development of advanced composites. The vinyl groups provide a reactive site that can bond with other materials, such as fillers, resins, or inorganic compounds, creating composite materials with superior mechanical properties, thermal stability, and electrical conductivity. These composite materials are commonly used in industries such as automotive, aerospace, and construction.

The versatility of polysiloxanes di-Me, di-Ph vinyl group-terminated is further demonstrated in their application in the production of high-performance adhesives. The vinyl groups at the polymer chain's terminus enable the polymer to form strong bonds with substrates, particularly in the presence of suitable catalysts or curing agents. This property is especially useful in applications requiring the bonding of metal, glass, and plastic surfaces, where high-temperature stability and resistance to environmental stress are crucial.

These polysiloxanes are also utilized in the formulation of specialty lubricants and release agents. The combination of the flexible methyl groups and the phenyl groups with the reactive vinyl groups makes these materials ideal for reducing friction in mechanical systems and preventing adhesion to molds and surfaces during manufacturing processes.

Furthermore, polysiloxanes di-Me, di-Ph vinyl group-terminated find applications in the production of electronic materials. Their ability to undergo controlled crosslinking and form stable, durable networks makes them ideal for use in encapsulation, insulation, and protective coatings for electronic devices. The materials' thermal stability and electrical insulating properties are particularly beneficial in protecting sensitive electronic components from heat and environmental damage.

In conclusion, polysiloxanes di-Me, di-Ph vinyl group-terminated are versatile and high-performance materials that have a wide range of applications in industries such as automotive, aerospace, electronics, and construction. Their unique combination of flexibility, reactivity, and thermal stability makes them indispensable in the development of advanced materials that meet the demanding requirements of modern technology.