What is the main use of Bis [3- (Triethoxysilyl) Propyl] Disulfide?
Bis [3- (triethoxysilyl) propyl] disulfide compounds are important members of the silicone coupling agent family. Their main uses are quite extensive and play a key role in many fields.
First, in the field of composites, this compound can be called a bridge, which can effectively enhance the interfacial bonding force between inorganic materials and organic polymers. Inorganic fillers such as glass fibers, silica, etc., are mostly polar on the surface and are difficult to associate with non-polar organic polymers. The siloxane group at one end of the bis [3- (triethoxysilyl) propyl] disulfide compound can react with the hydroxyl group on the surface of the inorganic material to form a strong chemical bond; the organic functional group at the other end can chemically react or physically entangle with the organic polymer, thus greatly improving the mechanical properties and water resistance of the composite.
Second, in the rubber industry, it can be used as a vulcanization active agent. During the vulcanization process of rubber, the compound can promote the vulcanization reaction, shorten the vulcanization time, and improve the cross-linking density of the vulcanizate, thereby improving the strength, wear resistance and anti-aging properties of rubber products. Taking tire manufacturing as an example, the addition of this substance can improve the interaction between rubber and reinforcing fillers, improve the grip and wear resistance of tires, and prolong the service life.
Third, in the coatings and adhesives industry, it can improve the adhesion between the coating and the substrate. When this compound is added to the coating or adhesive, it can form a transition layer of chemical bonding on the surface of the substrate, enhancing the bonding strength between the coating or adhesive and the substrate, making the coating firmer, not easy to fall off, and improving the performance and durability of the coating and adhesive.
In short, bis [3- (triethoxysilyl) propyl] disulfide compounds occupy an important position in many industrial fields such as composites, rubber, coatings and adhesives due to their unique chemical structure and properties, which greatly promotes the improvement of related material properties and application expansion.
What are the physical properties of Bis [3- (Triethoxysilyl) Propyl] Disulfide
Bis [3- (Triethoxysilyl) Propyl] Disulfide is also a chemical substance, which is usually made of silane and Si-69. Its physical properties are specific, and it is widely used in multiple domains.
This compound is often light-colored to brown transparent liquid, which shows bright fluidity. Smell it, it has a special smell, but it is not pungent. Its boiling height is 255 ° C. This characteristic makes it still able to maintain the physical stability of the phase under the high phase environment, and it is not easy to dissipate.
Its density is 20 ° C, which is about 1.050 - 1.080g/cm ³, indicating that the ratio of its amount to the ratio is determined. It also has a certain solubility, which can be soluble in many kinds of soluble materials, such as toluene and acetone, but has limited solubility in water.
In addition, this compound has extraordinary effects in the fields of material surface modification and rubber engineering due to the presence of siloxane and disulfide in the molecule. It can increase the interfacial interaction force of the material and the material, so that the two can be better compatible and improve the performance of the material.
Is the Chemical Properties of Bis [3- (Triethoxysilyl) Propyl] Disulfide Stable?
Bis [3- (Triethoxysilyl) Propyl] Disulfide, its chemical properties are still stable. This substance contains siloxane groups and disulfide bonds. Siloxane can be hydrolyzed and condensed under appropriate conditions to form a siloxane network. Although this process involves chemical reactions, under normal conditions, if there are no specific initiators, the reaction is not easy to spontaneously. It has a certain tolerance to heat, light and common chemical reagents in a normal environment.
Looking at its structure, although the disulfide bond has a certain activity, it is difficult to change in the environment without strong oxidizing agents, reducing agents or specific catalytic conditions. Usually stored in a cool, dry and ventilated place, its chemical properties can be kept stable for a certain period of time. And because of its relatively stable chemical properties, it is widely used in many fields such as materials science, such as to improve the interfacial bonding force between inorganic materials and organic polymers. In this process, it can effectively improve the properties of composites by virtue of its relatively stable and moderately reactive properties, while its own structure and properties can remain relatively stable in the application environment.
What are the precautions for Bis [3- (Triethoxysilyl) Propyl] Disulfide during storage and transportation?
Bis [3- (Triethoxysilyl) Propyl] Disulfide is a chemical substance. During storage and transportation, many matters need to be paid careful attention.
When storing, the first environment is dry. This substance is easy to react with water. If the environment is humid, moisture will invade, or cause its hydrolysis and deterioration, which will damage its chemical properties and application efficiency. Therefore, it needs to be placed in a dry and well-ventilated place, away from water sources and places with high humidity.
Temperature is also critical. It should be stored in a cool place to avoid high temperature. Excessive temperature can accelerate its chemical reaction process, or cause adverse reactions such as decomposition and polymerization, resulting in quality deterioration. Generally speaking, an environment with a lower normal room temperature is appropriate, and the specific temperature can be carefully determined according to the product description.
During transportation, the packaging must be sturdy and reliable. Because of its certain chemical activity, if the packaging is damaged, leaks, or reacts with surrounding substances, it will cause a safety accident. The packaging materials used must be resistant to corrosion of this substance, and tightly sealed to prevent air and moisture from infiltrating.
In addition, it should be isolated from oxidizing, acidic and alkaline substances. This substance is chemically active, comes into contact with the above substances, or triggers violent chemical reactions, endangering transportation safety.
Handling process must be handled with care to avoid severe vibration and collision. Strong vibration or collision or damage to the packaging, causing material leakage, which brings risks. In conclusion, when storing and transporting Bis [3- (Triethoxysilyl) Propyl] Disulfide, care should be taken in all aspects of the environment, packaging, and handling to ensure its quality and safety.
What is the synthesis method of Bis [3- (Triethoxysilyl) Propyl] Disulfide
To make bis [3- (triethoxysilyl) propyl] disulfide, you can follow the following ancient method.
First take 3-mercaptopropyl triethoxysilane, which is the key raw material. Place an appropriate amount of it in a clean reactor, which needs to be dry and oxygen-free to prevent impurities from interfering with the reaction with oxygen.
Then, slowly add an appropriate amount of initiator, such as azobisisobutyronitrile, to the reactor. The amount of initiator needs to be precisely controlled. At least the reaction is difficult to start, and at most it may cause the reaction to go out of control.
The reaction temperature is also crucial. Raise the reaction system temperature to an appropriate range, about 60-80 degrees Celsius, and maintain a constant temperature in a water or oil bath. At this temperature, the thiol group (-SH) in the 3-mercaptopropyl triethoxysilane molecule can undergo free radical reaction under the action of the initiator.
The sulfur atoms in the thiol group of the two molecules of 3-mercaptopropyl triethoxysilane will combine with each other to form a disulfide bond (-S-S-), and then form bis [3- (triethoxysilyl) propyl] disulfide.
During the reaction process, thin-layer chromatography or gas chromatography can be used to monitor. When the raw material peak is significantly weakened and the product peak is stable, the reaction can be regarded as basically completed.
Subsequently, the reaction mixture is cooled to room temperature and the product is purified by vacuum distillation. The unreacted raw materials, initiators and other impurities are removed to obtain pure bis [3- (triethoxysilyl) propyl] disulfide. The whole process must be handled carefully and the procedures must be strictly followed to obtain the ideal product.