Method of manufacturing crosslinking agent
In the field of raw materials for chemical production, crosslinking agent is an important additive to improve the performance and service life of materials. The function of crosslinking agent is to form chemical bonds in polymer materials, connecting linear molecular chains into a three-dimensional network structure, thus increasing the hardness, strength, heat resistance, corrosion resistance and other properties of the material. This article will introduce several common crosslinking agent manufacturing methods.
1. Peroxide cross-linking agent manufacturing method
peroxide cross-linking agent is a commonly used cross-linking agent in polymer materials, and its mechanism is to generate free radicals through the decomposition of peroxide, which triggers the cross-linking reaction of polymer chains. The method of manufacturing peroxide crosslinking agent generally adopts oxidation-reduction reaction, mixing peroxide with reducing agent, and the reaction generates hydrogen peroxide and corresponding salts. Commonly used peroxides include diisopropyl benzene peroxide (DCP), benzoyl peroxide (BPO), and so on.
2. Methods of manufacturing silane crosslinking agents
Silane crosslinking agent is a kind of crosslinking agent commonly used in polyethylene, polypropylene and other plastic materials, and its mechanism of action is to realize crosslinking through the reaction of alkoxyl groups in silane and hydroxyl groups in polymer materials to generate siloxane bonds. The method of manufacturing silane crosslinking agent generally adopts the hydrolysis-condensation reaction, in which silane is mixed with hydrolyzing agent, and the reaction generates silanol, which is then condensed into siloxane oligomer. Commonly used silanes include vinyltrimethoxysilane, methyltrimethoxysilane and so on.
3. Polyamine crosslinking agent manufacturing method
Polyamine crosslinking agent is a kind of crosslinking agent commonly used in rubber, adhesive and other materials, and its action mechanism is to realize crosslinking through the reaction of amino group in polyamine and carboxyl group or aldehyde group and other functional groups in the polymer material to generate chemical bond. The method of manufacturing polyamine crosslinking agent generally adopts the mixing method, mixing a variety of polyamines in a certain proportion to produce polyamine crosslinking agent. Commonly used polyamines include diethylenetriamine, triethylenetetramine and so on.
4. Radiation crosslinking agent manufacturing method
Radiation crosslinking agent is a kind of additive that induces crosslinking of polymer materials through high-energy radiation. Its mechanism is that high-energy radiation makes the polymer chain produce free radicals, free radicals collide with each other to form chemical bonds to realize crosslinking. The method of manufacturing radiation crosslinking agent generally adopts the physical mixing method, the radiation sensitizer and polymer materials are mixed uniformly, and then crosslinking is realized through high-energy radiation treatment. Commonly used radiation sensitizers include triallyl isocyanurate and diacrylate.
In short, there are various manufacturing methods for crosslinking agents, and different crosslinking agents are suitable for different polymer materials, and their action mechanisms are also different. In the process of manufacturing crosslinking agent, it is necessary to choose the appropriate manufacturing method according to the specific application requirements and the nature of raw materials to ensure the quality and effect of crosslinking agent. At the same time, with the continuous progress of science and technology and the improvement of environmental protection requirements, the development of efficient and environmentally friendly crosslinking agent manufacturing methods is also an important trend for future development.
