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Plasticizers' plasticizing mechanism
2017-12-21 16:12:52
Plasticizers' plasticizing mechanism
The plasticizing mechanism of plasticizers is introduced in this paper.
Plasticizer plasticizing mechanism research shows that due to the plasticizer molecules inserted between resin polymer molecular chains, weaken the attraction between polymer molecules, the activity of the polymer chain increased, decreased the degree of crystallinity of the polymer, thereby increasing polymer plasticity, flexibility and cold resistance, the glass transition temperature, plastic the softening temperature or viscous flow temperature decreased, the viscosity decreased, increased mobility, greatly improves the performance of plastic molding.
The plasticizing mechanism of plasticizer is illustrated with the plasticizing effect of two octyl phthalate plasticizer on polyvinyl chloride as an example.
Plasticizer plasticized PVC is found in the study of mechanism of polar molecules, molecular weight, molecular chain is very long, the molecular link between, between the molecules and the great attraction, a random coil intertwined.
When PVC is heated, the thermal motion of the molecular chain is very severe, so the intermolecular force is weakened, the interval increases, then add the adjacent benzene two formic acid two ester plasticizer to PVC molecular chains in the interval, it will cause the polar component of PVC molecular chain and plasticizer polar interaction effect of increasing non-polar component plasticizer sandwiched between the PVC molecular chain hindered PVC molecular chain close to each other.
Plasticizers weaken the interaction force between molecules, and the thermal movement of molecules becomes easier, which reduces the glass transition temperature of PVC T9, and the rigid PVC becomes soft.
Generally, plasticizer molecules must contain polar parts that interact with polar polymers, such as polyvinyl chloride, cellulose nitrate, cellulose acetate, etc., and do not interact with polymers.
Plasticizer is a plastic can reduce the melting temperature or melt viscosity, so as to improve the forming performance of the final product, the more soft and add material, is a kind of polymer material added to increase the plasticity, easy processing, products to give softness of functional chemical products, at the same time so far the production and consumption of the largest additive.
Plasticizer is various, the commercialization of the 500 kinds of the adjacent benzene two formic acid ester plasticizer production and consumption of the largest agents (especially the adjacent benzene two formic acid two ester D0P, dibutyl phthalate (DBP)) was 69%, accounting for 8%, followed by aliphatic epoxy ester, trimesic acid accounted for 7% accounted for 4%, accounting for 2% of the other. It is expected that the total demand for Plasticizer in China will increase at an annual rate of 2.5% in the next few years.
Two octyl terephthalate (plasticizer DOTP) raw materials are generally synthesized from the process route of terephthalic acid or two methyl terephthalate as raw material.
Safety data for export goods of two octyl terephthalate (plasticizer DOTP)
CAS No.:6422-86-2
State of the goods: export by general goods.
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.
Plasticizer is a low molecular compound or polymer, usually high boiling point volatile liquid or low melting point solid, and most of them are ester organic compounds.
Different plastics use different plasticizers, such as nitrocellulose, using camphor as plasticizer. Cellulose acetate uses methyl benzene and two formic acid as plasticizers. The most plasticizers in industry are polyvinyl chloride, and the plasticizers used are more than 80% of the total production.
There are many classifications of plasticizers, which are commonly classified as following.
According to chemical structure, plasticizers can be divided into two types, namely, phthalic acid esters, aliphatic two esters, petroleum sulfonic phenyl esters, phosphate esters, polyester, epoxides, and chlorinated compounds. This classification method has certain significance for the production of plasticizer.
According to the usage and the compatibility with the resin. Plasticizer can be divided into plasticizers, secondary plasticizers (secondary plasticizers), auxiliary plasticizers and plasticizers (increments) according to their compatibility and compatibility with resins. The main plasticizer has sufficient compatibility with the resin and is completely compatible in a certain range. Usually the proportion of the main plasticizer and the resin can reach 1: 1 without producing precipitation, so it can be used alone. The secondary plasticizer has poor affinity and compatibility to resin polymers, and can not be used alone. It can only be shared with main plasticizers, and the ratio of use is 1: 3. The purpose is mainly to replace some main plasticizers. Since the increments are almost insoluble in resin and can not be used alone, they can only be used in the primary and secondary plasticizers. The purpose of addition is to reduce the cost.
According to the use and processing property of the plasticizer. According to the use and processability of plasticizers, plasticizers can be divided into general plasticizers, cold resistant plasticizers, heat-resistant plasticizers, flame retardant plasticizers and nontoxic plasticizers.
According to the size of the plasticizer, the size of the molecule is different. According to the molecular size of different plasticizers, plasticizers can be divided into single type plasticizer and polymeric plasticizer, two molecules of different sizes, the viscosity is also different: the former with molecular weight ranging from 300 to 600, the viscosity was 3 * 10 2Pas, the molecular weight is 1000 ~ 8000. The viscosity of up to tens of thousands of Pas.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The plasticizing mechanism of plasticizers is introduced in this paper.
Plasticizer plasticizing mechanism research shows that due to the plasticizer molecules inserted between resin polymer molecular chains, weaken the attraction between polymer molecules, the activity of the polymer chain increased, decreased the degree of crystallinity of the polymer, thereby increasing polymer plasticity, flexibility and cold resistance, the glass transition temperature, plastic the softening temperature or viscous flow temperature decreased, the viscosity decreased, increased mobility, greatly improves the performance of plastic molding.
The plasticizing mechanism of plasticizer is illustrated with the plasticizing effect of two octyl phthalate plasticizer on polyvinyl chloride as an example.
Plasticizer plasticized PVC is found in the study of mechanism of polar molecules, molecular weight, molecular chain is very long, the molecular link between, between the molecules and the great attraction, a random coil intertwined.
When PVC is heated, the thermal motion of the molecular chain is very severe, so the intermolecular force is weakened, the interval increases, then add the adjacent benzene two formic acid two ester plasticizer to PVC molecular chains in the interval, it will cause the polar component of PVC molecular chain and plasticizer polar interaction effect of increasing non-polar component plasticizer sandwiched between the PVC molecular chain hindered PVC molecular chain close to each other.
Plasticizers weaken the interaction force between molecules, and the thermal movement of molecules becomes easier, which reduces the glass transition temperature of PVC T9, and the rigid PVC becomes soft.
Generally, plasticizer molecules must contain polar parts that interact with polar polymers, such as polyvinyl chloride, cellulose nitrate, cellulose acetate, etc., and do not interact with polymers.
Plasticizer is a plastic can reduce the melting temperature or melt viscosity, so as to improve the forming performance of the final product, the more soft and add material, is a kind of polymer material added to increase the plasticity, easy processing, products to give softness of functional chemical products, at the same time so far the production and consumption of the largest additive.
Plasticizer is various, the commercialization of the 500 kinds of the adjacent benzene two formic acid ester plasticizer production and consumption of the largest agents (especially the adjacent benzene two formic acid two ester D0P, dibutyl phthalate (DBP)) was 69%, accounting for 8%, followed by aliphatic epoxy ester, trimesic acid accounted for 7% accounted for 4%, accounting for 2% of the other. It is expected that the total demand for Plasticizer in China will increase at an annual rate of 2.5% in the next few years.
Two octyl terephthalate (plasticizer DOTP) raw materials are generally synthesized from the process route of terephthalic acid or two methyl terephthalate as raw material.
Safety data for export goods of two octyl terephthalate (plasticizer DOTP)
CAS No.:6422-86-2
State of the goods: export by general goods.
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.
Plasticizer is a low molecular compound or polymer, usually high boiling point volatile liquid or low melting point solid, and most of them are ester organic compounds.
Different plastics use different plasticizers, such as nitrocellulose, using camphor as plasticizer. Cellulose acetate uses methyl benzene and two formic acid as plasticizers. The most plasticizers in industry are polyvinyl chloride, and the plasticizers used are more than 80% of the total production.
There are many classifications of plasticizers, which are commonly classified as following.
According to chemical structure, plasticizers can be divided into two types, namely, phthalic acid esters, aliphatic two esters, petroleum sulfonic phenyl esters, phosphate esters, polyester, epoxides, and chlorinated compounds. This classification method has certain significance for the production of plasticizer.
According to the usage and the compatibility with the resin. Plasticizer can be divided into plasticizers, secondary plasticizers (secondary plasticizers), auxiliary plasticizers and plasticizers (increments) according to their compatibility and compatibility with resins. The main plasticizer has sufficient compatibility with the resin and is completely compatible in a certain range. Usually the proportion of the main plasticizer and the resin can reach 1: 1 without producing precipitation, so it can be used alone. The secondary plasticizer has poor affinity and compatibility to resin polymers, and can not be used alone. It can only be shared with main plasticizers, and the ratio of use is 1: 3. The purpose is mainly to replace some main plasticizers. Since the increments are almost insoluble in resin and can not be used alone, they can only be used in the primary and secondary plasticizers. The purpose of addition is to reduce the cost.
According to the use and processing property of the plasticizer. According to the use and processability of plasticizers, plasticizers can be divided into general plasticizers, cold resistant plasticizers, heat-resistant plasticizers, flame retardant plasticizers and nontoxic plasticizers.
According to the size of the plasticizer, the size of the molecule is different. According to the molecular size of different plasticizers, plasticizers can be divided into single type plasticizer and polymeric plasticizer, two molecules of different sizes, the viscosity is also different: the former with molecular weight ranging from 300 to 600, the viscosity was 3 * 10 2Pas, the molecular weight is 1000 ~ 8000. The viscosity of up to tens of thousands of Pas.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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