News Details
Polymer plasticizer
2017-12-26 17:42:47
Polymer plasticizer
In this paper, polymer material plasticizers were explained. The migration and extraction of polymer plasticizers were mainly introduced, involving the hazards and principles of migration.
Any material added to the polymer system that can increase the plasticity of the polymer system can be called plasticizer. 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, and the general internal plasticizer is the second monomer introduced in the polymerization process of the polymer. 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.
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.
Plasticizer is mainly used in polyvinyl chloride (PVC) resin. The amount of PVC can account for more than 98% of the total plasticizer consumption. Therefore, the development of plasticizer is closely related to the development of PVC industry.
The harm and principle of the migration and extraction of the polymer plasticizer. The migration phenomenon occurred in the plastic products in contact with other solid polymer applications, because plasticizer molecules migrate from high concentration to plasticizing another polymer medium, often lead to product surface softening, sticky and even fragmentation, actual migration resistance is resistant to pollution.
The loss of the extraction of plasticizers refers to the loss of plasticizers from the plasticizer to the liquid medium, which is closely related to the properties of the liquid medium. Volatility refers to the diffusion of plasticizers from the surface of the products to the air when they are heated. As volatilization occurs, it may lead to the occurrence of atomization and aging.
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.
The molecular weight of the plasticizer has a great influence on the volatility, and the increase of molecular weight helps to inhibit the volatilization. It has been proved that the plasticizers with good compatibility, large molecular weight and the structure of branched chain or benzene ring are more difficult to migrate and extract from the PVC.
When plasticizer migrates and draws seriously in PVC, it will cause great changes in products, causing products to soften, stick, or even break. The precipitates often cause product contamination, and also affect the two processing of products. For example, the migration of plasticizer molecules in PVC waterproofing membrane and the shrinkage and hardening of PVC after losing plasticizer can lead to failure of waterproof function.
When soft PVC products are pasted with general solvent adhesives, plasticizers in the products often migrate to the adhesive layer, causing the sharp drop of bond strength, resulting in problems such as lack of bond or degumming. When the soft PVC products are painted or painted, they are also faced with the problem of the coating or coating loss caused by the extracted plasticizer.
Research shows that o-phthalate plasticizer products are volatile during processing. After PVC is added to the finished products, it has exudation and migration. When large dose enters the body, it has carcinogenicity.
Ionic liquids (Ionic Liquids) consist of positively charged ions and negatively charged ions. They are liquid state at -100~200 C, and are not volatile. They have good compatibility with organic and inorganic materials.
Such as the ionic liquid Mustafizur Rahman with phosphino series of plasticized PVC, and verified the ionic liquid as a substitute of phthalic acid ester plasticizer and the feasibility of increasing in resistance to extraction and migration experiments, its performance is better than the currently widely used in medicines and daily necessities in the plasticizer, the series of ionic liquids. Plastic products in terms of flexibility, service life, loss of movement have shown excellent results, and overcomes most of plasticizer in the process of volatile disadvantages.
Lou Shuai and other studies found that ionic liquids as plasticizers had good compatibility with PMMA. No phase separation and exudation were observed. Polymers maintained high transparency.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
In this paper, polymer material plasticizers were explained. The migration and extraction of polymer plasticizers were mainly introduced, involving the hazards and principles of migration.
Any material added to the polymer system that can increase the plasticity of the polymer system can be called plasticizer. 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, and the general internal plasticizer is the second monomer introduced in the polymerization process of the polymer. 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.
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.
Plasticizer is mainly used in polyvinyl chloride (PVC) resin. The amount of PVC can account for more than 98% of the total plasticizer consumption. Therefore, the development of plasticizer is closely related to the development of PVC industry.
The harm and principle of the migration and extraction of the polymer plasticizer. The migration phenomenon occurred in the plastic products in contact with other solid polymer applications, because plasticizer molecules migrate from high concentration to plasticizing another polymer medium, often lead to product surface softening, sticky and even fragmentation, actual migration resistance is resistant to pollution.
The loss of the extraction of plasticizers refers to the loss of plasticizers from the plasticizer to the liquid medium, which is closely related to the properties of the liquid medium. Volatility refers to the diffusion of plasticizers from the surface of the products to the air when they are heated. As volatilization occurs, it may lead to the occurrence of atomization and aging.
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.
The molecular weight of the plasticizer has a great influence on the volatility, and the increase of molecular weight helps to inhibit the volatilization. It has been proved that the plasticizers with good compatibility, large molecular weight and the structure of branched chain or benzene ring are more difficult to migrate and extract from the PVC.
When plasticizer migrates and draws seriously in PVC, it will cause great changes in products, causing products to soften, stick, or even break. The precipitates often cause product contamination, and also affect the two processing of products. For example, the migration of plasticizer molecules in PVC waterproofing membrane and the shrinkage and hardening of PVC after losing plasticizer can lead to failure of waterproof function.
When soft PVC products are pasted with general solvent adhesives, plasticizers in the products often migrate to the adhesive layer, causing the sharp drop of bond strength, resulting in problems such as lack of bond or degumming. When the soft PVC products are painted or painted, they are also faced with the problem of the coating or coating loss caused by the extracted plasticizer.
Research shows that o-phthalate plasticizer products are volatile during processing. After PVC is added to the finished products, it has exudation and migration. When large dose enters the body, it has carcinogenicity.
Ionic liquids (Ionic Liquids) consist of positively charged ions and negatively charged ions. They are liquid state at -100~200 C, and are not volatile. They have good compatibility with organic and inorganic materials.
Such as the ionic liquid Mustafizur Rahman with phosphino series of plasticized PVC, and verified the ionic liquid as a substitute of phthalic acid ester plasticizer and the feasibility of increasing in resistance to extraction and migration experiments, its performance is better than the currently widely used in medicines and daily necessities in the plasticizer, the series of ionic liquids. Plastic products in terms of flexibility, service life, loss of movement have shown excellent results, and overcomes most of plasticizer in the process of volatile disadvantages.
Lou Shuai and other studies found that ionic liquids as plasticizers had good compatibility with PMMA. No phase separation and exudation were observed. Polymers maintained high transparency.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian