News Details
The mechanism of action of plasticizer
2017-12-8 22:59:37
The mechanism of action of plasticizer is introduced in this paper. Because the polarity of plasticizer and resin is different, the mechanism of different plasticizers is different.
The effect of plasticizer on the 1. volume effect. This effect is mainly for non polar plasticizers, its mode of action for the middle molecular chain is inserted into the resin, increase the distance between the molecules, thus weaken the force between the molecules, lower melt viscosity, increase the flexibility of polymer chains, the plasticizer added more, the greater the volume effect moreover, long chain structure increase volume effect of plasticizer ratio of plasticizer large ring structure.
The mechanism of action of plasticizer is 2. shielding effect. This effect is mainly for polar plasticizer, its mode of action to increase the interaction between polar plasticizer and polar polymer instead of the polar attraction between polymer molecules, thus weaken the intermolecular forces, the plasticizing effect is called shielding effect.
Or a plasticizer, plasticizer, plasticizer, is an increase of soft material or additive material liquefaction. Its added objects include plastic, concrete, dry wall materials, cement and gypsum and so on. The same plasticizer is often used on different objects, but the effects are often different. There are more than 100 kinds of plasticizers, but the most common use is a group of compounds called phthalic acid esters. According to the statistics of the world's plasticizer Market in 2004, the total amount was about 5 million 500 thousand tons and moved towards 6 million tons.
Plastic plasticizers based on their functions and environments are made into products with various hardness, soft hardness and gloss. The more plasticizer needed for soft plastic products is, the more plastic plasticizers added. The fresh-keeping film commonly used, is a kind of non additive PE (polyethylene) material, but its viscosity is poor; the other is a widely used PVC (polyvinyl chloride) plastic film, a large number of plasticizer to make PVC material becomes soft and increases the viscosity, very suitable for fresh food packaging.
Concrete uses plasticizer (water reducing agent), which can increase the workability of the mixture, facilitate the construction and do not produce honeycomb easily, so as to reduce the water content and increase the strength. Adding plasticizers to the wall materials can increase the degree of liquefaction of the mixture, so that the time required for drying walls can be reduced without adding too much water.
Plasticizers can be divided into two types, that is, the internal plasticizer and the external plasticizer.
The internal plasticizer is actually a part of the polymer. The general internal plasticizer is the second monomer introduced in the polymerization process of the polymer. Because of the second monomers in the molecular structure of the polymer, the polymer chains have lower isotacticity, which reduce the crystallinity of polymer chain. For example, the vinyl chloride vinyl ester copolymer is more soft than the vinyl chloride homopolymer. The internal plasticizer has a narrow range of use temperature and must be added to the polymerization process, so the internal plasticizer is less used.
Physical and chemical properties of two octyl terephthalate (plasticizer DOTP)
Appearance: transparent and colorless liquid
Boiling point: 400 degrees centigrade
Density: 0.984
Melting point: 30-34 degrees centigrade
Flash point: 238 degrees centigrade
Refractive index: 1.489-1.491
Flash point centigrade 210
Water is less than or equal to 0.03
Acid value is less than 0.1 mgKOH/g
The refractive index is greater than or equal to 1.4900 (20 C)
Color = (platinum cobalt) 30
The ester content% (chromatography) more than 99.5
Density (20 C) g/cm3 0.981-0.985
Use of two octyl terephthalate (plasticizer DOTP)
1.DOTP has good electrical and thermal properties. It can be used to replace DOP in the sheath of PVC plastic wire and can also be used in the production of artificial leather membrane. In addition, with excellent compatibility, terephthalic acid ester is two PVC acrylonitrile derivatives plastic plasticizer, plasticizer, plasticizer, polyvinyl butyral nitrile rubber plasticizer, plasticizer for cellulose nitrate. The improvement of the product and plays the role of hardness and deformation, can be used as softener in NBR, chloroprene rubber, EPDM rubber and other products three. Especially for cable material, it has good plasticizing effect and low volatility. It is widely used in various products that require heat resistance and high insulation. It is an ideal plasticizer for producing 70 PVC cable material and other volatile resistant products.
2.DOTP is used for the PVC products in the car, which can solve the fog problem of the glass window. DOTP is also used for high quality lubricants or lubricant additives furniture and interior decoration paint, and precision instruments, nitro varnish additives, paper softener, biaxially oriented polyester amide membrane film, plastic bags and other crafts, plasma storage.
3. because the linear molecular structure of DOTP is similar to DOS and DOA, its cold resistance is also better.
The volume resistivity of 4.DOTP is 10-20 times higher than that of DOP, and its mobility is excellent.
5., because DOTP does not contain o-phthalate two formate, it is not an environmental friendly plasticizer in the range of 16 16 kinds of plasticizers containing o-phthalic acid in the European Union and other countries.
An external plasticizer is a low molecular weight compound or polymer that is added to the polymer that needs to be plasticized, which can increase the plasticity of the polymer. Outside the plasticizer is a kind of solid high boiling point, difficult volatile liquid or low melting point, and most of them are esters of organic compounds. Usually, they do not react with polymers. The interaction with polymers is mainly due to swelling at elevated temperatures, forming a solid solution with polymers. The external plasticizer has more comprehensive performance and convenient production and use, and is widely used. Now the plasticizers are generally said to be external plasticizers. The adjacent benzene two formic acid two ester (DOP) and dibutyl phthalate (DBP) are outside the plasticizer.
The plasticizer is divided into the following types according to the chemical structure:
(1) benzoic acid esters (including phthalic, phenylene, and benzoate two formate).
(2) aliphatic dicarboxylic acid esters (including azelaic acid, adipic acid ester, two two decyl ester).
(3) phosphoric acid esters (including fatty alcohol phosphate, phofolyl phosphate and chlorophosphate).
(4) polyol ester (including three glycerol acetate, diethylene glycol benzoate etc.).
(5) phthalic acid esters (including three octyl benzoic acid, three hexatenoic acid, three hexyl ester, and four acid four ester).
(6) citrate [including citric acid three ethyl ester, acetyl citric acid three ethyl ester, citric acid three butyl ester, acetyl citric acid three (2- ethyl already) ester etc.].
(7) polyester (including propanediol adipate polyester, decanediol propylene glycol polyester, phthalic acid two formic acid polyester, etc.).
(8) epoxy (including epoxy soybean oil, linseed oil, epoxy, epoxy, epoxy oleic butyl octyl stearate, epoxidized triglycerides, epoxy four hydrogen phthalate two formic acid two ester etc.).
(9) chlorine containing (including chlorinated paraffin, five chlorinated stearic acid methyl ester).
(10) a reactive plasticizer (including maleic acid, maleic acid two two butyl octyl ester, acrylic acid / methyl acrylic polyol ester, fumaric acid, itaconic acid, unsaturated polyester resin, etc.).
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The effect of plasticizer on the 1. volume effect. This effect is mainly for non polar plasticizers, its mode of action for the middle molecular chain is inserted into the resin, increase the distance between the molecules, thus weaken the force between the molecules, lower melt viscosity, increase the flexibility of polymer chains, the plasticizer added more, the greater the volume effect moreover, long chain structure increase volume effect of plasticizer ratio of plasticizer large ring structure.
The mechanism of action of plasticizer is 2. shielding effect. This effect is mainly for polar plasticizer, its mode of action to increase the interaction between polar plasticizer and polar polymer instead of the polar attraction between polymer molecules, thus weaken the intermolecular forces, the plasticizing effect is called shielding effect.
Or a plasticizer, plasticizer, plasticizer, is an increase of soft material or additive material liquefaction. Its added objects include plastic, concrete, dry wall materials, cement and gypsum and so on. The same plasticizer is often used on different objects, but the effects are often different. There are more than 100 kinds of plasticizers, but the most common use is a group of compounds called phthalic acid esters. According to the statistics of the world's plasticizer Market in 2004, the total amount was about 5 million 500 thousand tons and moved towards 6 million tons.
Plastic plasticizers based on their functions and environments are made into products with various hardness, soft hardness and gloss. The more plasticizer needed for soft plastic products is, the more plastic plasticizers added. The fresh-keeping film commonly used, is a kind of non additive PE (polyethylene) material, but its viscosity is poor; the other is a widely used PVC (polyvinyl chloride) plastic film, a large number of plasticizer to make PVC material becomes soft and increases the viscosity, very suitable for fresh food packaging.
Concrete uses plasticizer (water reducing agent), which can increase the workability of the mixture, facilitate the construction and do not produce honeycomb easily, so as to reduce the water content and increase the strength. Adding plasticizers to the wall materials can increase the degree of liquefaction of the mixture, so that the time required for drying walls can be reduced without adding too much water.
Plasticizers can be divided into two types, that is, the internal plasticizer and the external plasticizer.
The internal plasticizer is actually a part of the polymer. The general internal plasticizer is the second monomer introduced in the polymerization process of the polymer. Because of the second monomers in the molecular structure of the polymer, the polymer chains have lower isotacticity, which reduce the crystallinity of polymer chain. For example, the vinyl chloride vinyl ester copolymer is more soft than the vinyl chloride homopolymer. The internal plasticizer has a narrow range of use temperature and must be added to the polymerization process, so the internal plasticizer is less used.
Physical and chemical properties of two octyl terephthalate (plasticizer DOTP)
Appearance: transparent and colorless liquid
Boiling point: 400 degrees centigrade
Density: 0.984
Melting point: 30-34 degrees centigrade
Flash point: 238 degrees centigrade
Refractive index: 1.489-1.491
Flash point centigrade 210
Water is less than or equal to 0.03
Acid value is less than 0.1 mgKOH/g
The refractive index is greater than or equal to 1.4900 (20 C)
Color = (platinum cobalt) 30
The ester content% (chromatography) more than 99.5
Density (20 C) g/cm3 0.981-0.985
Use of two octyl terephthalate (plasticizer DOTP)
1.DOTP has good electrical and thermal properties. It can be used to replace DOP in the sheath of PVC plastic wire and can also be used in the production of artificial leather membrane. In addition, with excellent compatibility, terephthalic acid ester is two PVC acrylonitrile derivatives plastic plasticizer, plasticizer, plasticizer, polyvinyl butyral nitrile rubber plasticizer, plasticizer for cellulose nitrate. The improvement of the product and plays the role of hardness and deformation, can be used as softener in NBR, chloroprene rubber, EPDM rubber and other products three. Especially for cable material, it has good plasticizing effect and low volatility. It is widely used in various products that require heat resistance and high insulation. It is an ideal plasticizer for producing 70 PVC cable material and other volatile resistant products.
2.DOTP is used for the PVC products in the car, which can solve the fog problem of the glass window. DOTP is also used for high quality lubricants or lubricant additives furniture and interior decoration paint, and precision instruments, nitro varnish additives, paper softener, biaxially oriented polyester amide membrane film, plastic bags and other crafts, plasma storage.
3. because the linear molecular structure of DOTP is similar to DOS and DOA, its cold resistance is also better.
The volume resistivity of 4.DOTP is 10-20 times higher than that of DOP, and its mobility is excellent.
5., because DOTP does not contain o-phthalate two formate, it is not an environmental friendly plasticizer in the range of 16 16 kinds of plasticizers containing o-phthalic acid in the European Union and other countries.
An external plasticizer is a low molecular weight compound or polymer that is added to the polymer that needs to be plasticized, which can increase the plasticity of the polymer. Outside the plasticizer is a kind of solid high boiling point, difficult volatile liquid or low melting point, and most of them are esters of organic compounds. Usually, they do not react with polymers. The interaction with polymers is mainly due to swelling at elevated temperatures, forming a solid solution with polymers. The external plasticizer has more comprehensive performance and convenient production and use, and is widely used. Now the plasticizers are generally said to be external plasticizers. The adjacent benzene two formic acid two ester (DOP) and dibutyl phthalate (DBP) are outside the plasticizer.
The plasticizer is divided into the following types according to the chemical structure:
(1) benzoic acid esters (including phthalic, phenylene, and benzoate two formate).
(2) aliphatic dicarboxylic acid esters (including azelaic acid, adipic acid ester, two two decyl ester).
(3) phosphoric acid esters (including fatty alcohol phosphate, phofolyl phosphate and chlorophosphate).
(4) polyol ester (including three glycerol acetate, diethylene glycol benzoate etc.).
(5) phthalic acid esters (including three octyl benzoic acid, three hexatenoic acid, three hexyl ester, and four acid four ester).
(6) citrate [including citric acid three ethyl ester, acetyl citric acid three ethyl ester, citric acid three butyl ester, acetyl citric acid three (2- ethyl already) ester etc.].
(7) polyester (including propanediol adipate polyester, decanediol propylene glycol polyester, phthalic acid two formic acid polyester, etc.).
(8) epoxy (including epoxy soybean oil, linseed oil, epoxy, epoxy, epoxy oleic butyl octyl stearate, epoxidized triglycerides, epoxy four hydrogen phthalate two formic acid two ester etc.).
(9) chlorine containing (including chlorinated paraffin, five chlorinated stearic acid methyl ester).
(10) a reactive plasticizer (including maleic acid, maleic acid two two butyl octyl ester, acrylic acid / methyl acrylic polyol ester, fumaric acid, itaconic acid, unsaturated polyester resin, etc.).
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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