CN111978654A - High-insulation recycled plastic and processing technology thereof - Google Patents
High-insulation recycled plastic and processing technology thereof Download PDFInfo
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- CN111978654A CN111978654A CN202010769114.8A CN202010769114A CN111978654A CN 111978654 A CN111978654 A CN 111978654A CN 202010769114 A CN202010769114 A CN 202010769114A CN 111978654 A CN111978654 A CN 111978654A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L2205/00—Polymer mixtures characterised by other features
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- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
Abstract
The application relates to a high-insulation recycled plastic and a processing technology thereof, belonging to the technical field of recycled materials, wherein the used raw materials of the recycled plastic comprise the following components in parts by weight: 46.87-50.87 parts of recycled polystyrene, 47.37-49.37 parts of polystyrene, 0.5-2.5 parts of polystyrene-butadiene copolymer, 0.05-0.21 part of carbon black, 0.06-0.20 part of magnesium stearate, 0.0035-0.0044 part of styrene-maleic anhydride copolymer, 5.93-7.93 parts of zirconium dioxide, 0.2-0.3 part of monoalkyl ether phosphate potassium salt, 0.15-0.25 part of lauryl alcohol ether phosphate potassium salt, 3.2-5.2 parts of basalt fiber, 7.5-8.5 parts of calcium aromatic acid and 9.0-10.6 parts of wood powder.
Description
Technical Field
The application relates to the technical field of recycled materials, in particular to high-insulation recycled plastic and a processing technology thereof.
Background
At present, with the development of economy, the usage amount of plastics is higher and higher, but because plastics can not be naturally degraded, the environment can be greatly polluted, so in order to achieve environmental protection and energy saving, waste plastics are generally subjected to resource recovery, processing and recycling, and resources are not lost.
Plastic is an insulating material, and the insulating property is usually measured by dielectric strength. Dielectric strength refers to the maximum voltage per unit thickness that a plastic can withstand when broken down. The shell, the toner cartridge and other positions of a common printer are made of plastics, because the printer can generate an electrostatic effect in a working state, short-time high-voltage static electricity can generate stronger voltage, and when the voltage generated by the static electricity is greater than the breakdown voltage of the plastics, the plastics can lose insulativity, so that the printer is damaged.
Disclosure of Invention
It is an object of the present application to provide a highly insulating recycled plastic having a higher dielectric strength, reducing the likelihood of the plastic being punctured.
The second purpose of the application is to provide a processing technology of the high-insulation recycled plastic, which is simple in technology and enables the produced recycled plastic to have higher insulation.
The above object of the present application is achieved by the following technical solutions:
the high-insulation regenerated plastic comprises the following raw materials in parts by weight: 46.87-50.87 parts of recycled polystyrene, 47.37-49.37 parts of polystyrene, 0.5-2.5 parts of polystyrene-butadiene copolymer, 0.05-0.21 part of carbon black, 0.06-0.20 part of magnesium stearate, 0.0035-0.0044 part of styrene-maleic anhydride copolymer, 5.93-7.93 parts of zirconium dioxide, 0.2-0.3 part of monoalkyl ether phosphate potassium salt, 0.15-0.25 part of lauryl alcohol ether phosphate potassium salt, 3.2-5.2 parts of basalt fiber, 7.5-8.5 parts of calcium aromatic acid and 9.0-10.6 parts of wood powder.
By adopting the technical scheme, in order to save resources and reduce production cost, the recycled polystyrene in the range is added and mixed with polystyrene to be used to prepare the recycled plastic, and the mechanical property of the recycled polystyrene is poor, so that the mechanical property of the recycled polystyrene is enhanced by adding the wood flour in the range, and the wood flour are mutually crossed and wound to form a good wrapping phenomenon with the recycled polystyrene so as to generate good mechanical interlocking. The mesh number of the wood powder used in the application is 100-200 meshes, the specific surface area of the wood powder in the mesh number range is larger, the contact area of the wood powder and the recycled polystyrene is increased, the bonding force between the wood powder and the recycled polystyrene is increased, and the mechanical property of the recycled polystyrene is enhanced.
The polystyrene butadiene copolymer has uniform quality, less foreign matters and excellent mechanical stability, and the polystyrene butadiene copolymer is added into the plastic in the range and matched with the recycled polystyrene for use, so that the toughness of the recycled plastic can be improved, the bearing strength is increased, and the brittleness of the recycled plastic is reduced.
The carbon black is light, loose and superfine black powder with large specific surface area, and is added in the range, so that the carbon black is dispersed in the recycled plastic, the mechanical property of the recycled plastic can be enhanced, and the effects of coloring and toning are achieved. Since the higher the degree of dispersion of carbon black in the recycled plastic, the higher the coloring strength, the use of carbon black in combination with magnesium stearate and styrene-maleic anhydride copolymer in this range improves the coloring property of carbon black in the recycled plastic.
Magnesium stearate and styrene-maleic anhydride copolymer are used as a dispersing agent and added into the recycled plastic to improve the dispersibility of the carbon black in the recycled plastic and improve the dispersibility of other components in the recycled plastic. The styrene-maleic anhydride copolymer is used as an amphiphilic polymer surfactant, the hydrophobic chain segment is composed of styrene, and the styrene-maleic anhydride copolymer can be stably anchored on the nonpolar surfaces of other components in the regenerated plastic; the hydrophilic chain segment is composed of maleic anhydride, and can form a space protection layer with a certain thickness on the surface of other components in the recycled plastic. When other component particles in the recycled plastic adsorbed with the styrene-maleic anhydride copolymer are close to each other, the steric hindrance of the protective layer enables the other component particles in the recycled plastic to be uniformly dispersed in the recycled plastic, and the recycled plastic has good stability and is not easy to agglomerate or flocculate, so that the mechanical property of the recycled plastic is improved.
Since the dielectric strength of the recycled plastic decreases with an increase in temperature, it is necessary to improve the heat resistance of the recycled plastic in order to maintain a high dielectric strength even in a high-temperature environment. The zirconium dioxide has stable chemical properties and higher melting point and resistivity, and the dielectric strength and heat resistance of the regenerated plastic can be obviously improved by adding the zirconium dioxide into the regenerated plastic according to the range;
the basalt fiber is a fiber obtained by melting natural basalt ore at high temperature of about 1500 ℃, then forming the molten basalt ore through a platinum-rhodium alloy bushing plate and drawing the molten basalt fiber at high speed by a wire drawing machine, so that the basalt fiber has high tensile strength, high temperature resistance, heat insulation and other excellent performances, the use tolerance temperature range of the basalt fiber is-260 ℃ to 700 ℃, the tolerance temperature range of the glass fiber and the like is generally 60 ℃ to 450 ℃, and the mechanical property and the heat resistance of the plastic can be obviously improved by adding the basalt fiber into the regenerated plastic according to the range;
therefore, the zirconium dioxide and the basalt fiber are added into the recycled plastic according to the proportion range, so that the dielectric strength and the heat resistance of the recycled plastic can be obviously improved; meanwhile, the zirconium dioxide can improve the tensile strength of the basalt fiber and can enable Fe in the basalt fiber2+Conversion to Fe3+The heat resistance of the basalt fiber is improved, and the phenomenon that the strength of the basalt fiber is reduced at a higher temperature is reduced, so that the heat resistance of the recycled plastic is improved.
The monoalkyl ether phosphate potassium salt and the lauryl alcohol ether phosphate potassium salt are used as organic salts, have good heat resistance, antistatic property and the like due to the existence of phosphorus atoms, and the dielectric strength and the heat resistance of the regenerated plastic can be obviously improved by adding the monoalkyl ether phosphate potassium salt and the lauryl alcohol ether phosphate potassium salt into the regenerated plastic according to the proportion range; meanwhile, the potassium monoalkyl ether phosphate, the potassium lauryl ether phosphate, the zirconium dioxide and the basalt fiber have synergistic effects and are matched with each other, so that the dielectric strength, the heat resistance and the mechanical property of the recycled plastic are comprehensively improved.
The aromatic acid calcium belongs to rigid particles, has stronger dispersity and stability, is added into the recycled plastic according to the range, is matched with basalt fibers, wood powder and the like for use, and can obviously enhance the mechanical property of the recycled plastic.
Preferably, the raw materials comprise the following components in parts by weight: 48.00-49.74 parts of recycled polystyrene, 48.00-48.74 parts of polystyrene, 1.3-1.7 parts of polystyrene-butadiene copolymer, 0.10-0.16 part of carbon black, 0.09-0.17 part of magnesium stearate, 0.0039-0.0040 part of styrene-maleic anhydride copolymer, 6.00-7.86 parts of zirconium dioxide, 0.23-0.27 part of monoalkyl ether phosphate potassium salt, 0.18-0.22 part of lauryl alcohol ether phosphate potassium salt, 4.0-4.4 parts of basalt fiber, 7.7-8.3 parts of calcium aromatic acid and 9.5-10.1 parts of wood powder.
By adopting the technical scheme, the recycled polystyrene and the polystyrene are matched to prepare the recycled plastic according to the range, so that the resource is saved, and the production cost is reduced; simultaneously adding carbon black in the range as a coloring agent into the recycled plastic; meanwhile, zirconium dioxide, monoalkyl ether phosphate potassium salt, lauryl alcohol ether phosphate potassium salt, basalt fiber, wood powder and calcium aromatic acid are added according to the range to be mixed and matched for use, so that the dielectric strength, the heat resistance and the mechanical property of the regenerated plastic are further improved; meanwhile, magnesium stearate and styrene-maleic anhydride copolymer within the range are added to be used as a dispersing agent in a matched mode, so that the dispersibility of each component in the recycled plastic is enhanced, the effect of each component in the recycled plastic is improved, and the dielectric strength, the heat resistance and the mechanical property of the recycled plastic are improved.
Preferably, the zirconium dioxide is modified by the following method:
firstly, drying zirconium dioxide at the temperature of 115-125 ℃ for 1.8-2.2h, then stirring a silane coupling agent and the zirconium dioxide at the temperature of 85-95 ℃ for 18-22min, and then drying at the temperature of 116-124 ℃ for 1.9-2.1h to obtain modified zirconium dioxide; wherein the weight ratio of zirconium dioxide to silane coupling agent is 1: (0.01-0.02).
By adopting the technical scheme, as the zirconium dioxide is easy to absorb moisture in the air and presents hydrophilic characteristics, and agglomeration phenomenon is easy to occur in the regenerated plastic, the silane coupling agent is utilized as the modifying agent to modify the zirconium dioxide according to the range, and the conditions such as temperature range and the like are controlled, so that the silane coupling agent is grafted to the surface of the zirconium dioxide, the hydrophilicity of the zirconium dioxide is improved, the compatibility of the zirconium dioxide and an organic phase in the regenerated plastic is enhanced, the dispersibility of the zirconium dioxide in the regenerated plastic is improved, the functions of enhancing the dielectric strength and the heat resistance of the zirconium dioxide in the regenerated plastic can be fully exerted, and the dielectric strength and the heat resistance of the regenerated plastic are improved. Meanwhile, the zirconium dioxide is dried in the temperature range, so that the influence of moisture contained in the zirconium dioxide on the modification process is reduced.
Preferably, the zirconium dioxide comprises zirconium dioxide with the particle diameter of 58-62nm and zirconium dioxide with the particle diameter of 225-235 nm; wherein the weight ratio of zirconium dioxide with the particle diameter of 58-62nm to zirconium dioxide with the particle diameter of 225-235nm is (0.28-0.32): 1.
by adopting the technical scheme, the zirconium dioxide with two particle size ranges is mixed and matched in the range, so that the performances of the two particle sizes can be mutually compensated, and the dielectric strength, the heat resistance and the mechanical property of the regenerated plastic are comprehensively improved. If the proportion of the zirconium dioxide with small particle size is too high, the zirconium dioxide particles with small particle size have too strong interaction, are easy to agglomerate, and cannot fully play the synergistic effect of two different particle size ranges, so that the dielectric strength, the heat resistance and the mechanical property of the regenerated plastic are reduced.
Preferably, the styrene-maleic anhydride copolymer is modified by the following method:
uniformly mixing a styrene-maleic anhydride copolymer, p-toluenesulfonic acid and tetrahydrofuran, dropwise adding 4-ethyl sulfate sulfuryl aniline sodium salt, reacting at the temperature of 62-65 ℃ for 5.5-6.5h, washing to remove tetrahydrofuran, and drying at the temperature of 80-86 ℃ to obtain a modified styrene-maleic anhydride copolymer; wherein the weight ratio of the styrene-maleic anhydride copolymer to the p-toluenesulfonic acid to the tetrahydrofuran to the sodium salt of 4-ethyl sulfate sulfuryl aniline is (4.3-4.46): (0.2-0.24): (245-255): (4.28-4.48).
By adopting the technical scheme, because the maleic anhydride in the styrene-maleic anhydride copolymer needs to be subjected to ring-opening reaction before reaction, if the reaction time is too short, the ring-opening reaction cannot be sufficiently carried out, the reaction of the maleic anhydride and 4-ethyl sulfate sulfuryl aniline sodium salt is influenced, and the effect of modifying the styrene-maleic anhydride copolymer is reduced. Controlling the reaction temperature within this range is advantageous for improving the acylation reaction, and if the temperature is too high, the stability of the reaction process is affected. The proportion range of the p-toluenesulfonic acid, the 4-ethyl sulfate sulfuryl aniline sodium salt and the styrene-maleic anhydride copolymer is controlled, so that the modified styrene-maleic anhydride copolymer has high dispersibility and heat resistance, and the modified styrene-maleic anhydride copolymer is dispersed in the recycled plastic, so that the dielectric strength, the heat resistance and the mechanical property of the recycled plastic are enhanced.
Preferably, the aromatic acid calcium is modified by using acrylic acid and/or oxalic acid as a modifier.
Preferably, the modification method of the aromatic acid calcium comprises the following steps: drying the calcium aromatic acid at the temperature of 115-125 ℃ for 5.8-6.2h, stirring and mixing the calcium aromatic acid and the modifier at the temperature of 78-82 ℃ and the rotating speed of 2450-; wherein the weight ratio of the aromatic acid calcium to the modifier to the paraffin is 1 (0.028-0.032): (0.018-0.022).
By adopting the technical scheme, acrylic acid and/or oxalic acid are/is used as a modifier to modify the aromatic calcium in the range, and because the acrylic acid and the oxalic acid contain polar groups, one end of each polar group faces outwards in the reaction process, the hydrophilic surface of the aromatic calcium is changed into a hydrophobic surface, the compatibility of the aromatic calcium with other components in the regenerated plastic is improved, and the dispersibility and the reinforcing performance of the aromatic calcium in the plastic are improved; meanwhile, the melting temperature of the recycled plastic is improved by modifying the calcium aromatic acid, so that the heat resistance of the recycled plastic is improved.
The second purpose of the application is to provide a processing technology of high-insulation recycled plastic, which comprises the following steps:
s1: drying all the raw materials at the temperature of 158-166 ℃ for 1-2 h;
s2: mixing the dried raw materials at a rotation speed of 40-60r/min for 8-12min to obtain a mixture;
s3: and melting, blending and extruding the mixture to obtain the recycled plastic.
By adopting the technical scheme, all the raw materials are dried within the temperature range, the moisture in all the raw materials is fully eliminated, the possibility of decomposition of the raw materials in the melting process is reduced, all the raw materials are uniformly mixed, and then are melted, blended and extruded, the process is simple, and the obtained recycled plastic has high dielectric strength, heat resistance and mechanical property.
Preferably, the device used in the process of step S3 is a screw extruder; the temperature of each section of the screw extruder is as follows: the temperature of the head is 215-; the rotating speed of the screw in the screw extruder is 1590-1610 r/min.
Through adopting above-mentioned technical scheme, the temperature in the control screw extruder in this within range can obviously increase the mobility of reclaimed plastic fuse-element, improves reclaimed plastic's elongation at break to improved reclaimed plastic's mechanical properties, if the high temperature in the screw extruder, can make the energy consumption of preparation reclaimed plastic increase, thereby make manufacturing cost improve.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the recycled plastic prepared by the method has high dielectric strength, heat resistance and mechanical property through the matching of the components;
2. the processing technology of the recycled plastic has the advantages that the operation process is simple, the recycled polystyrene is used in the used raw materials, and the production cost is low;
3. according to the application, the zirconium dioxide, the styrene-maleic anhydride copolymer and the calcium aromatic acid are subjected to modification treatment, so that the dispersibility of each component in the regenerated plastic is enhanced.
Detailed Description
The present application will be described in further detail with reference to examples.
In the following examples and comparative examples:
recovered polystyrene was purchased from Fpico;
polystyrene was purchased from taiwan gaofu;
polystyrene butadiene copolymers are available from LG;
carbon black is available from ORION;
magnesium stearate was purchased from the chinese science;
styrene-maleic anhydride copolymer was purchased from Hubei Xin Hongli chemical Co., Ltd;
monoalkyl ether phosphate potassium salt was purchased from scientific biotechnology limited of warrior, wuhan;
the potassium laureth phosphate is obtained from Ghan scientific Biotech limited;
the 4-ethyl sulfate sulfuryl aniline sodium salt is purchased from Shanghai-based Biotech limited;
the wood flour is purchased from the wood processing factory in Benzhou province in Fisher county, and the mesh number is 100-200 meshes.
Example 1
A processing technology of high-insulation recycled plastic comprises the following steps:
s1: 46.87kg of recycled polystyrene, 49.37kg of polystyrene, 0.5kg of polystyrene butadiene copolymer, 0.21kg of carbon black, 0.06kg of magnesium stearate, 0.0044kg of styrene-maleic anhydride copolymer, 5.93kg of zirconium dioxide, 0.3kg of potassium monoalkyl ether phosphate, 0.15kg of potassium lauryl alcohol ether phosphate, 5.2kg of basalt fiber, 7.5kg of calcium arylate and 10.6kg of wood flour are dried at a temperature of 158 ℃ for 1 hour;
s2: mixing the dried raw materials for 8min at a rotating speed of 40r/min to obtain a mixture;
s3: putting the mixture into a screw extruder, and carrying out melt blending and extrusion to obtain regenerated plastic; wherein the temperature of each interval of the screw extruder is as follows: the head temperature is 215 ℃, 195 ℃ in the 1 region, 195 ℃ in the 2 region, 200 ℃ in the 3 region, 200 ℃ in the 4 region, 205 ℃ in the 5 region, 205 ℃ in the 6 region, 210 ℃ in the 7 region and 210 ℃ in the 8 region; the rotating speed of the screw is 1590 r/min;
wherein in step S1, the zirconium dioxide comprises 1.288kg of zirconium dioxide with a particle diameter of 58nm and 4.6kg of zirconium dioxide with a particle diameter of 225 nm.
Example 2
A processing technology of high-insulation recycled plastic comprises the following steps:
s1: 50.87kg of recycled polystyrene, 47.37kg of polystyrene, 2.5kg of polystyrene-butadiene copolymer, 0.05kg of carbon black, 0.2kg of magnesium stearate, 0.0035kg of styrene-maleic anhydride copolymer, 7.93kg of zirconium dioxide, 0.2kg of potassium monoalkyl ether phosphate, 0.25kg of potassium lauryl alcohol ether phosphate, 3.2kg of basalt fiber, 8.5kg of calcium arylate and 9.0kg of wood flour were dried at a temperature of 158 ℃ for 1 hour;
s2: mixing the dried raw materials for 8min at a rotating speed of 40r/min to obtain a mixture;
s3: putting the mixture into a screw extruder, and carrying out melt blending and extrusion to obtain regenerated plastic; wherein the temperature of each interval of the screw extruder is as follows: the head temperature is 215 ℃, 195 ℃ in the 1 region, 195 ℃ in the 2 region, 200 ℃ in the 3 region, 200 ℃ in the 4 region, 205 ℃ in the 5 region, 205 ℃ in the 6 region, 210 ℃ in the 7 region and 210 ℃ in the 8 region; the rotating speed of the screw is 1590 r/min;
wherein in step S1, the zirconium dioxide comprises 1.736kg of zirconium dioxide with a particle diameter of 58nm and 6.2kg of zirconium dioxide with a particle diameter of 225 nm.
Example 3
A processing technology of high-insulation recycled plastic comprises the following steps:
s1: 48.87kg of recycled polystyrene, 48.87kg of polystyrene, 1.5kg of polystyrene-butadiene copolymer, 0.13kg of carbon black, 0.13kg of magnesium stearate, 0.00395kg of styrene-maleic anhydride copolymer, 6.93kg of zirconium dioxide, 0.25kg of potassium monoalkyl ether phosphate, 0.2kg of potassium lauryl alcohol ether phosphate, 4.2kg of basalt fiber, 8kg of calcium arylate and 9.8kg of wood flour are dried at 162 ℃ for 1.5 h;
s2: mixing the dried raw materials for 10min at a rotating speed of 50r/min to obtain a mixture;
s3: putting the mixture into a screw extruder, and carrying out melt blending and extrusion to obtain regenerated plastic; wherein the temperature of each interval of the screw extruder is as follows: the head temperature is 225 deg.C, 205 deg.C in 1 region, 205 deg.C in 2 region, 210 deg.C in 3 region, 210 deg.C in 4 region, 215 deg.C in 5 region, 215 deg.C in 6 region, 220 deg.C in 7 region, and 220 deg.C in 8 region; the rotating speed of the screw is 1600 r/min;
wherein in step S1, the zirconium dioxide comprises 1.59kg of zirconium dioxide with a particle diameter of 60nm and 5.3kg of zirconium dioxide with a particle diameter of 230 nm.
Example 4
A processing technology of high-insulation recycled plastic comprises the following steps:
s1: drying 48kg of recycled polystyrene, 48.74kg of polystyrene, 1.3kg of polystyrene-butadiene copolymer, 0.16kg of carbon black, 0.09kg of magnesium stearate, 0.004kg of styrene-maleic anhydride copolymer, 6kg of zirconium dioxide, 0.27kg of potassium monoalkyl ether phosphate, 0.18kg of potassium lauryl alcohol ether phosphate, 4.4kg of basalt fiber, 7.7kg of calcium aromatic acid and 10.1kg of wood flour at the temperature of 166 ℃ for 2 hours;
s2: mixing the dried raw materials at a rotating speed of 60r/min for 12min to obtain a mixture;
s3: putting the mixture into a screw extruder, and carrying out melt blending and extrusion to obtain regenerated plastic; wherein the temperature of each interval of the screw extruder is as follows: the temperature of the machine head is 235 ℃, 215 ℃ in the 1 region, 215 ℃ in the 2 region, 210 ℃ in the 3 region, 220 ℃ in the 4 region, 220 ℃ in the 5 region, 225 ℃ in the 6 region, 225 ℃ in the 7 region and 230 ℃ in the 8 region; the rotating speed of the screw is 1610 r/min;
wherein in step S1, the zirconium dioxide comprises 1.44kg of zirconium dioxide with a particle diameter of 62nm and 4.5kg of zirconium dioxide with a particle diameter of 235 nm.
Example 5
A processing technology of high-insulation recycled plastic comprises the following steps:
s1: 49.74kg of recycled polystyrene, 48kg of polystyrene, 1.7kg of polystyrene-butadiene copolymer, 0.1kg of carbon black, 0.17kg of magnesium stearate, 0.0039kg of styrene-maleic anhydride copolymer, 7.86kg of zirconium dioxide, 0.23kg of potassium monoalkyl ether phosphate, 0.22kg of potassium lauryl alcohol ether phosphate, 4kg of basalt fiber, 8.3kg of calcium arylate and 9.5kg of wood flour were dried at 166 ℃ for 2 hours;
s2: mixing the dried raw materials at a rotating speed of 60r/min for 12min to obtain a mixture;
s3: putting the mixture into a screw extruder, and carrying out melt blending and extrusion to obtain regenerated plastic; wherein the temperature of each interval of the screw extruder is as follows: the temperature of the machine head is 235 ℃, 215 ℃ in the 1 region, 215 ℃ in the 2 region, 210 ℃ in the 3 region, 220 ℃ in the 4 region, 220 ℃ in the 5 region, 225 ℃ in the 6 region, 225 ℃ in the 7 region and 230 ℃ in the 8 region; the rotating speed of the screw is 1610 r/min;
wherein in step S1, the zirconium dioxide comprises 1.9kg of zirconium dioxide with a particle diameter of 62nm and 5.96kg of zirconium dioxide with a particle diameter of 235 nm.
Example 6
The processing technology of the high-insulation recycled plastic is different from that of the embodiment 3 in that: the zirconium dioxide is modified by the following method:
30g of zirconium dioxide is dried for 1.8h at the temperature of 115 ℃, then 0.3g of silane coupling agent and the zirconium dioxide are stirred for 18min at the temperature of 85 ℃, and then the mixture is dried for 1.9h at the temperature of 116 ℃ to obtain the modified zirconium dioxide.
Example 7
The processing technology of the high-insulation recycled plastic is different from that of the embodiment 3 in that: the zirconium dioxide is modified by the following method:
30g of zirconium dioxide is dried for 2.2h at the temperature of 125 ℃, then 0.6g of silane coupling agent and the zirconium dioxide are stirred for 22min at the temperature of 95 ℃, and then dried for 2.1h at the temperature of 124 ℃ to obtain the modified zirconium dioxide.
Example 8
The processing technology of the high-insulation recycled plastic is different from that of the embodiment 3 in that: the styrene-maleic anhydride copolymer was modified by the following method:
4.3g of styrene-maleic anhydride copolymer, 0.2g of p-toluenesulfonic acid and 245g of tetrahydrofuran are uniformly mixed, 4.28g of 4-ethyl sulfate sulfuryl aniline sodium salt is dropwise added, the mixture reacts for 5.5 hours at the temperature of 62 ℃, the tetrahydrofuran is washed and removed, and the mixture is dried at the temperature of 80 ℃ to obtain the modified styrene-maleic anhydride copolymer.
Example 9
The processing technology of the high-insulation recycled plastic is different from that of the embodiment 3 in that: the styrene-maleic anhydride copolymer was modified by the following method:
4.46g of styrene-maleic anhydride copolymer, 0.24g of p-toluenesulfonic acid and 255g of tetrahydrofuran are uniformly mixed, 4.48g of 4-ethyl sulfate sulfuryl aniline sodium salt is dropwise added, the mixture reacts for 6.5 hours at the temperature of 65 ℃, the tetrahydrofuran is washed and removed, and the mixture is dried at the temperature of 86 ℃ to obtain the modified styrene-maleic anhydride copolymer.
Example 10
The processing technology of the high-insulation recycled plastic is different from that of the embodiment 3 in that: the aromatic acid calcium is modified by the following method:
100g of calcium aromatic acid is dried for 5.8h at the temperature of 115 ℃, then the calcium aromatic acid and 2.8g of acrylic acid are stirred and mixed for 5min at the temperature of 78 ℃ and the rotating speed of 2450r/min, and then 1.8g of paraffin is added to obtain the modified calcium aromatic acid.
Example 11
The processing technology of the high-insulation recycled plastic is different from that of the embodiment 3 in that: the aromatic acid calcium is modified by the following method:
drying 100g of calcium aromatic acid at the temperature of 120 ℃ for 6h, stirring and mixing the calcium aromatic acid with 3.0g of mixed solution of acrylic acid and oxalic acid at the temperature of 80 ℃ and the rotating speed of 2500r/min for 7.5min, and then adding 2g of paraffin to obtain the modified calcium aromatic acid.
Example 12
The processing technology of the high-insulation recycled plastic is different from that of the embodiment 3 in that: the aromatic acid calcium is modified by the following method:
100g of calcium aromatic acid is dried for 6.2h at the temperature of 125 ℃, then at the temperature of 82 ℃ and the rotating speed of 2550r/min, the calcium aromatic acid and 3.2g of oxalic acid are stirred and mixed for 10min, and then 2.2g of paraffin is added to obtain the modified calcium aromatic acid.
Comparative example 1
The difference from example 3 is that: styrene-maleic anhydride copolymer, zirconium dioxide, monoalkyl ether phosphate potassium salt, lauryl alcohol ether phosphate potassium salt, basalt fiber, calcium aromatic acid and wood powder are not added, and the rest are the same.
Comparative example 2
The difference from example 3 is that: the same applies to the remainder without the addition of styrene-maleic anhydride copolymer.
Comparative example 3
The difference from example 3 is that: the same applies to the remaining monoalkyl ether phosphate potassium salt.
Comparative example 4
The difference from example 3 is that: the lauryl alcohol ether potassium phosphate is not added, and the rest is the same.
Comparative example 5
The difference from example 3 is that: the basalt fiber is replaced by glass fiber, and the rest is the same.
Comparative example 6
The difference from example 3 is that: the particle diameters of the zirconium dioxide were all 60nm, the remainder being identical.
Comparative example 7
The difference from example 3 is that: the particle diameters of the zirconium dioxide were all 230nm, the remainder being identical.
Performance testing
The recycled plastics obtained in examples 1 to 12 and comparative examples 1 to 7 were subjected to the following tests for dielectric strength, heat resistance and mechanical properties, and the test results are shown in Table 1:
according to GB 1048-.
The mechanical property is subjected to tensile test according to GB/T1040.1-2006, the plastic is placed on a universal testing machine for tensile test, the tensile speed is 50mm/min, and the breaking elongation (%) of the recycled plastic is measured.
The high temperature resistance is measured according to GB 1035-70, and the temperature (DEG C) of the recycled plastic reaches certain bending deformation in a constant temperature rising environment.
TABLE 1 test results table
| Item | Dielectric strength (KV/mm) | Elongation at Break (%) | Deformation temperature (. degree. C.) |
| Example 1 | 30.1 | 340.6 | 409.11 |
| Example 2 | 30.5 | 341.5 | 411.21 |
| Example 3 | 31.4 | 355.2 | 438.77 |
| Example 4 | 30.9 | 342.1 | 412.56 |
| Example 5 | 30.6 | 341.9 | 411.36 |
| Example 6 | 35.9 | 358.6 | 450.16 |
| Example 7 | 36.1 | 359.1 | 451.21 |
| Example 8 | 33.5 | 360.9 | 444.36 |
| Example 9 | 33.4 | 361.2 | 445.61 |
| Example 10 | 32.8 | 367.3 | 441.69 |
| Example 11 | 33.1 | 368.1 | 442.11 |
| Example 12 | 33.0 | 368.0 | 442.03 |
| Comparative example 1 | 21.8 | 200.5 | 250.16 |
| Comparative example 2 | 26.1 | 300.6 | 349.63 |
| Comparative example 3 | 24.3 | 312.4 | 330.16 |
| Comparative example 4 | 24.5 | 311.9 | 331.21 |
| Comparative example 5 | 25.6 | 285.8 | 337.85 |
| Comparative example 6 | 25.8 | 317.3 | 350.23 |
| Comparative example 7 | 25.5 | 315.2 | 350.17 |
As can be seen from Table 1, the dielectric strength, elongation at break and deformation temperature of examples 1-5 are all higher than those of comparative example 1, which illustrates that the dielectric strength, mechanical properties and heat resistance of the recycled plastic can be comprehensively enhanced by adding zirconium dioxide, styrene-maleic anhydride copolymer, potassium monoalkyl ether phosphate, potassium lauryl ether phosphate, basalt fiber, calcium aromatic acid and wood flour to the recycled plastic according to the range of examples 1-5, so that the prepared recycled plastic has higher insulation, mechanical properties and heat resistance, wherein the insulation, heat resistance and mechanical properties of the recycled plastic prepared in example 3 are the best;
the dielectric strength, the elongation at break and the deformation temperature of the examples 6-7 are all higher than those of the example 3, which shows that the zirconium dioxide is modified to improve the dispersibility in the recycled plastic, thereby improving the dielectric strength, the mechanical property and the heat resistance of the recycled plastic;
the dielectric strength, the elongation at break and the deformation temperature of the examples 8-9 are all higher than those of the example 3, which shows that the compatibility of the styrene-maleic anhydride copolymer with other components in the recycled plastic can be improved by modifying the styrene-maleic anhydride copolymer, so that the dispersibility of the other components in the recycled plastic is improved, and the dielectric strength, the mechanical property and the heat resistance of the recycled plastic are improved;
the dielectric strength, the elongation at break and the deformation temperature of the examples 10 to 12 are all higher than those of the example 3, which shows that the aromatic acid calcium is modified to improve the dispersibility of the aromatic acid calcium in the recycled plastic, so that the aromatic acid calcium is better filled in the recycled plastic, and the dielectric strength, the mechanical property and the heat resistance of the recycled plastic are improved;
comparative examples 2 to 4, in which the dielectric strength, elongation at break and deformation temperature were lower than those of example 3, show that the dispersibility of the material was increased without adding the styrene-maleic anhydride copolymer or one of the potassium monoalkyl ether phosphate and the potassium lauryl ether phosphate was not added, so that the synergistic effect between them could not be exerted, thereby reducing the dielectric strength, mechanical properties and heat resistance of the recycled plastic;
the dielectric strength, the elongation at break and the deformation temperature of the comparative example 5 are lower than those of the example 3, which shows that the dielectric strength, the heat resistance and the mechanical property of the glass fiber are poorer than those of the basalt fiber, and the zirconium dioxide can enhance the performance of the basalt fiber, so that the dielectric strength, the mechanical property and the heat resistance of the recycled plastic can be reduced by replacing the basalt fiber with the glass fiber;
comparative examples 6 to 7, in which the dielectric strength, elongation at break and deformation temperature were lower than those of example 3, showed that the dielectric strength, mechanical properties and heat resistance of the recycled plastic were reduced by using only zirconia having one particle diameter, and comparative example 6, in which the respective properties were reduced by comparative example 7, was larger than those of comparative example 6, showed that the larger particle diameter decreased the dielectric strength, mechanical properties and heat resistance of the recycled plastic.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A high-insulation recycled plastic is characterized in that: the raw materials comprise the following components in parts by weight: 46.87-50.87 parts of recycled polystyrene, 47.37-49.37 parts of polystyrene, 0.5-2.5 parts of polystyrene-butadiene copolymer, 0.05-0.21 part of carbon black, 0.06-0.20 part of magnesium stearate, 0.0035-0.0044 part of styrene-maleic anhydride copolymer, 5.93-7.93 parts of zirconium dioxide, 0.2-0.3 part of monoalkyl ether phosphate potassium salt, 0.15-0.25 part of lauryl alcohol ether phosphate potassium salt, 3.2-5.2 parts of basalt fiber, 7.5-8.5 parts of calcium aromatic acid and 9.0-10.6 parts of wood powder.
2. The high-insulation recycled plastic as claimed in claim 1, wherein: the raw materials comprise the following components in parts by weight: 48.00-49.74 parts of recycled polystyrene, 48.00-48.74 parts of polystyrene, 1.3-1.7 parts of polystyrene-butadiene copolymer, 0.10-0.16 part of carbon black, 0.09-0.17 part of magnesium stearate, 0.0039-0.0040 part of styrene-maleic anhydride copolymer, 6.00-7.86 parts of zirconium dioxide, 0.23-0.27 part of monoalkyl ether phosphate potassium salt, 0.18-0.22 part of lauryl alcohol ether phosphate potassium salt, 4.0-4.4 parts of basalt fiber, 7.7-8.3 parts of calcium aromatic acid and 9.5-10.1 parts of wood powder.
3. A high-insulation recycled plastic as claimed in claim 1 or 2, wherein: the zirconium dioxide is modified by the following method:
firstly, drying zirconium dioxide at the temperature of 115-125 ℃ for 1.8-2.2h, then stirring a silane coupling agent and the zirconium dioxide at the temperature of 85-95 ℃ for 18-22min, and then drying at the temperature of 116-124 ℃ for 1.9-2.1h to obtain modified zirconium dioxide; wherein the weight ratio of zirconium dioxide to silane coupling agent is 1: (0.01-0.02).
4. A high-insulation recycled plastic as claimed in claim 1 or 2, wherein: the zirconium dioxide comprises zirconium dioxide with the particle diameter of 58-62nm and zirconium dioxide with the particle diameter of 225-235 nm; wherein the weight ratio of zirconium dioxide with the particle diameter of 58-62nm to zirconium dioxide with the particle diameter of 225-235nm is (0.28-0.32): 1.
5. a high-insulation recycled plastic as claimed in claim 1 or 2, wherein: the styrene-maleic anhydride copolymer is modified by the following method:
uniformly mixing a styrene-maleic anhydride copolymer, p-toluenesulfonic acid and tetrahydrofuran, dropwise adding 4-ethyl sulfate sulfuryl aniline sodium salt, reacting at the temperature of 62-65 ℃ for 5.5-6.5h, washing to remove tetrahydrofuran, and drying at the temperature of 80-86 ℃ to obtain a modified styrene-maleic anhydride copolymer; wherein the weight ratio of the styrene-maleic anhydride copolymer to the p-toluenesulfonic acid to the tetrahydrofuran to the sodium salt of 4-ethyl sulfate sulfuryl aniline is (4.3-4.46): (0.2-0.24): (245-255): (4.28-4.48).
6. The high-insulation recycled plastic as claimed in claim 1, wherein: the aromatic acid calcium adopts acrylic acid and/or oxalic acid as a modifier for modification treatment.
7. The high-insulation recycled plastic as claimed in claim 6, wherein: the modification method of the aromatic acid calcium comprises the following steps:
drying the calcium aromatic acid at the temperature of 115-125 ℃ for 5.8-6.2h, stirring and mixing the calcium aromatic acid and the modifier at the temperature of 78-82 ℃ and the rotating speed of 2450-; wherein the weight ratio of the aromatic acid calcium to the modifier to the paraffin is 1 (0.028-0.032): (0.018-0.022).
8. A process for processing high-insulation recycled plastic according to any one of claims 1 to 7, wherein the process comprises the following steps: the method comprises the following steps:
s1: drying all the raw materials at the temperature of 158-166 ℃ for 1-2 h;
s2: mixing the dried raw materials at a rotation speed of 40-60r/min for 8-12min to obtain a mixture;
s3: and melting, blending and extruding the mixture to obtain the recycled plastic.
9. The processing technology of the high-insulation recycled plastic as claimed in claim 8, wherein: the device used in the step S3 is a screw extruder; the temperature of each section of the screw extruder is as follows: the temperature of the head is 215-; the rotating speed of the screw in the screw extruder is 1590-1610 r/min.
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