1. With the continuous development of materials science and surface engineering technology, organosilicon compounds have attracted much attention due to their excellent chemical stability, interface regulation ability and bridge role in organic-inorganic hybrid materials. Among them, CAS NO.18001-13-3 (4-ethenylphenyl) trimethoxy-Silane, as a functional silane coupling agent with dual reactivity, has shown extensive and important application value in multiple high-performance material fields.

The product molecule contains both vinyl groups that can participate in polymerization reactions and trimethoxysilane groups that can form chemical bonds with inorganic surfaces. Therefore, it can serve as a "molecular bridge" to connect the organic and inorganic interfaces, playing an important role in polymer material modification, coating enhancement, biomedical materials and microelectronics industries.

2. Basic properties and structural characteristics

Chemical name : (4-ethenylphenyl) trimethoxy-Silane
Molecular formula : C11H16O3Si
Molecular weight : 224.33 g/mol
CAS number : 18001-13-3

Structural features :

One end is a vinyl benzene ring, which has good copolymerization ability and can participate in free radical polymerization reaction;

The other end is trimethoxysilane, which can hydrolyze to form silanol, and further form stable Si-O-Si covalent bonds with the surfaces of inorganic materials such as glass, alumina, and silica;

The functional groups at both ends of the molecule give it excellent interface coupling ability, making it suitable for a variety of surface treatments and composite material construction.

3. Reaction characteristics and functional mechanism

3.1 Hydrolysis and condensation reaction
In water or humid environment, trimethoxysilane groups will hydrolyze to form trihydroxysilane (Si-OH), which will then react with the surface of inorganic materials or other silanols to form stable silicon-oxygen bonds. This reaction is a key step in surface modification of glass, ceramics, etc.

3.2 Copolymerization Reaction Ability
Vinyl groups can participate in acrylic, styrene and other polymer systems through free radical polymerization, achieving a firm bond with the polymer skeleton and improving the interface strength and overall material performance.

3.3 Interface regulation function
With its amphiphilic structure, CAS NO.18001-13-3 (4-ethenylphenyl) trimethoxy-Silane can effectively improve the interface compatibility between organic and inorganic materials, reduce the interface energy, inhibit interface delamination and debonding, and improve the mechanical strength and durability of composite materials.

4. Main application areas

4.1) Organic-inorganic composite material reinforcement

CAS NO.18001-13-3 (4-ethenylphenyl) trimethoxy-Silane can significantly improve the interfacial bonding strength in the preparation of glass fiber reinforced resin , inorganic filler reinforced rubber and other composite materials. It is grafted into the resin matrix by copolymerization, and forms a covalent bond with glass or ceramic fillers with the help of silane groups, thereby achieving excellent mechanical properties and resistance to moisture and heat aging.

4.2) Coatings and adhesives

CAS NO.18001-13-3 (4-ethenylphenyl) trimethoxy-Silane is often used to prepare high-adhesion coating materials. By treating the surface of glass, metal or ceramic substrates, the adhesion, wear resistance and corrosion resistance of the coating can be improved. It is also used in UV curing coatings , electronic packaging adhesives and other systems.

4.3) Contact lens and intraocular lens materials

CAS NO.18001-13-3 (4-ethenylphenyl) trimethoxy-Silane Due to the polymerization ability of the vinyl group in the structure and its excellent contribution to biocompatibility, this silane has also been studied for use in the manufacture of medical polymers such as contact lens materials or intraocular lenses (IOLs). By copolymerizing with hydrophilic monomers such as HEMA and MMA, polymer materials with excellent optical properties and strong biocompatibility can be produced.

4.4) Surface modification in the microelectronics industry

In the semiconductor industry, this silane is used to construct a self-assembled monolayer (SAM) on the surface of silicon wafers . Through the participation of vinyl groups in subsequent photolithography or cross-linking reactions, it can be used to construct nano patterns and improve the adhesion of anti-etching layers. Its high stability and good film control ability make it potential in advanced packaging processes and MEMS manufacturing.

4.5) 3D printing photosensitive resin formula

With the development of photocuring 3D printing technology, CAS NO.18001-13-3 (4-ethenylphenyl) trimethoxy-Silane has also been used in high-performance photosensitive resin formulations. By regulating its copolymerization behavior and film-forming properties with the polymerization system, the dimensional accuracy and mechanical properties of 3D printed products can be improved, which is especially suitable for printing microstructure devices.

5. Examples of actual cases

Case 1: Glass fiber reinforced epoxy resin
In electronic packaging materials, a certain proportion of CAS NO.18001-13-3 (4-ethenylphenyl) trimethoxy-Silane is added to pre-treated glass fibers. The shear strength of the prepared composite material is increased by about 30%, the water absorption rate is reduced by 15%, and the reliability is significantly enhanced.

Case 2: High refractive index optical materials
A company developed an artificial lens material system for ophthalmic surgery. The silane was copolymerized with styrene monomers to produce a hydrophilic polymer lens with a refractive index of up to 1.53, which has excellent transparency and biocompatibility.

CAS NO.18001-13-3 (4-ethenylphenyl) trimethoxy-Silane is a silicone functional monomer with high reactivity and excellent interface affinity. With its unique dual-functional structure, it has shown strong application potential in modern materials engineering. With the continuous development of new materials technology, green chemistry and biomedical materials, its future application space will be broader. Whether in composite materials, functional coatings or optical medical fields, this silane will play an increasingly critical role.