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Plastic peroxide crosslinking modification
by：CSSSLD
2021-01-23
Plastic injection molding processing peroxide crosslinking mean peroxide crosslinking agent under a certain temperature decomposition to produce free radicals, trigger a reaction between polymer molecules, forming chemical bond between the macromolecular chains, so as to form the structure of the mesh size.
Peroxide crosslinking and radiation crosslinking there are two differences: 1.
Crosslinking process must have a crosslinking agent, namely the peroxide.
2.
Crosslinking reaction should be carried out under a certain temperature.
plastic peroxide crosslinking formulation design 1. Crosslinking agent and additives and the effect is good, with the addition of crosslinking agent amount is about 2, the help for the amount of crosslinking agent is 1 - Five copies.
2。 Decomposition temperature of crosslinking agent should be compatible with resin processing temperature.
3。 Pay attention to other additives on the influence of crosslinking agent.
plastic silane crosslinking modification technology is developed in recent years a new crosslinking technology injection molding processing, this method is compared with radiation method and peroxide method, has some advantages such as simple equipment, low cost, simple process, high equipment investment and radiation method, because of radiation sources, strict labor protection, and is easy to cause harm to the environment. Peroxides method is difficult to control, easy to premature crosslinking and effects processing.
silane cross combination material than radiation crosslinking and peroxide crosslinking, the types of materials used include: polymer, grafting agent, initiator, catalyst, antioxidant and so on.
the silane grafting agent, in theory, that contains a can be grafted with vinyl alkoxy of hydrolysis, amino grafting agent can do. But that is commonly used in actual grafting agent for vinyl silane three oxygen radicals, vinyl triethoxy silane and so on. The vinyl silane hydrolysis rate is more than three oxygen radicals vinyl triethoxy silane.
catalyst to promote grafting silane polymer hydrolysis reaction and condensation reaction. Although these two steps reaction can occur spontaneously, but the reaction speed is slow, so need to join soluble polymer crosslinked catalyst.
the role of the antioxidant to prevent in the process of crosslinking polymer oxidative degradation reaction, ensure that in the process of crosslinking polymer stability and service life of the product. Depending on the different crosslinking process, antioxidants can be before or after the grafting reaction to join.
a complete silane crosslinking formula should include polymer, cross connection branch agent, initiator, catalyst, sometimes also need to add antioxidants. Specific silane crosslinking process can be divided into four kinds, namely, second step by step process process method, copolymerization process and sealing mixing machine process, one step method and two footwork is the most commonly used.
more wonderful sharing: plastic radiation crosslinking modification, click directly.
or copy the link: http://www. csssld。 cn//html/2016/Info_0424/212。 HTML
nantong on plastic products factory's official website: http://www. csssld。 cn//
plastic peroxide crosslinking formulation design 1. Crosslinking agent and additives and the effect is good, with the addition of crosslinking agent amount is about 2, the help for the amount of crosslinking agent is 1 - Five copies.
2。 Decomposition temperature of crosslinking agent should be compatible with resin processing temperature.
3。 Pay attention to other additives on the influence of crosslinking agent.
plastic silane crosslinking modification technology is developed in recent years a new crosslinking technology injection molding processing, this method is compared with radiation method and peroxide method, has some advantages such as simple equipment, low cost, simple process, high equipment investment and radiation method, because of radiation sources, strict labor protection, and is easy to cause harm to the environment. Peroxides method is difficult to control, easy to premature crosslinking and effects processing.
silane cross combination material than radiation crosslinking and peroxide crosslinking, the types of materials used include: polymer, grafting agent, initiator, catalyst, antioxidant and so on.
the silane grafting agent, in theory, that contains a can be grafted with vinyl alkoxy of hydrolysis, amino grafting agent can do. But that is commonly used in actual grafting agent for vinyl silane three oxygen radicals, vinyl triethoxy silane and so on. The vinyl silane hydrolysis rate is more than three oxygen radicals vinyl triethoxy silane.
catalyst to promote grafting silane polymer hydrolysis reaction and condensation reaction. Although these two steps reaction can occur spontaneously, but the reaction speed is slow, so need to join soluble polymer crosslinked catalyst.
the role of the antioxidant to prevent in the process of crosslinking polymer oxidative degradation reaction, ensure that in the process of crosslinking polymer stability and service life of the product. Depending on the different crosslinking process, antioxidants can be before or after the grafting reaction to join.
a complete silane crosslinking formula should include polymer, cross connection branch agent, initiator, catalyst, sometimes also need to add antioxidants. Specific silane crosslinking process can be divided into four kinds, namely, second step by step process process method, copolymerization process and sealing mixing machine process, one step method and two footwork is the most commonly used.
more wonderful sharing: plastic radiation crosslinking modification, click directly.
or copy the link: http://www. csssld。 cn//html/2016/Info_0424/212。 HTML
nantong on plastic products factory's official website: http://www. csssld。 cn//
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