CN115286876A - Method for improving toughness of modified particles - Google Patents
Method for improving toughness of modified particles Download PDFInfo
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- CN115286876A CN115286876A CN202111568657.4A CN202111568657A CN115286876A CN 115286876 A CN115286876 A CN 115286876A CN 202111568657 A CN202111568657 A CN 202111568657A CN 115286876 A CN115286876 A CN 115286876A
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- 239000002245 particle Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000004793 Polystyrene Substances 0.000 claims abstract description 80
- 229920002223 polystyrene Polymers 0.000 claims abstract description 80
- 239000002994 raw material Substances 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 35
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 34
- 230000002745 absorbent Effects 0.000 claims abstract description 20
- 239000002250 absorbent Substances 0.000 claims abstract description 20
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 15
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 15
- 229920013636 polyphenyl ether polymer Polymers 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims description 54
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical group OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 claims description 27
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 22
- 239000012943 hotmelt Substances 0.000 claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- 229960000969 phenyl salicylate Drugs 0.000 claims description 8
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 7
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 7
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 7
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 7
- 229920005990 polystyrene resin Polymers 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims 1
- 238000012986 modification Methods 0.000 abstract description 13
- 230000004048 modification Effects 0.000 abstract description 13
- 229920003023 plastic Polymers 0.000 abstract description 9
- 239000004033 plastic Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920006352 transparent thermoplastic Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
-
- C—CHEMISTRY; METALLURGY
- 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
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of plastic particle modification, in particular to a method for improving the toughness of modified particles. It mainly is easy brittle failure to general polystyrene granule goods, causes the loss, simultaneously because the service environment is mostly open-air, takes place ageing problem more easily, proposes following technical scheme: the modified particles comprise the following raw materials in parts by mass: 48-78 parts of polystyrene, 12-27 parts of polyphenyl ether, 3-9 parts of antioxidant, 6-9 parts of white oil, 0.5-2 parts of reinforcing agent and 0.5-0.8 part of ultraviolet absorbent. The invention effectively modifies polystyrene material particles, greatly improves the toughness of the particles, solves the problems that the general polystyrene particles are easy to crack and the use scene is limited, expands the use functionality of the modified polystyrene, has the effects of high strength and high toughness, and is mainly applied to the modification of plastic product raw materials.
Description
Technical Field
The invention relates to the technical field of plastic particle modification, in particular to a method for improving the toughness of modified particles.
Background
Polystyrene is colorless transparent thermoplastic plastic, has the glass transition temperature higher than 100 ℃, and is often used for manufacturing various disposable containers needing to bear the temperature of boiled water, disposable foam lunch boxes and the like; the patent CN108997667A provides a preparation method of polystyrene plastic with ultrahigh toughness, in the scheme, silicon-doped carbonized polyethylene oxide is added to uniformly disperse in a plastic system, and the synergistic effect of micron-sized carbonized particles and modified fixed-base rubber particles is utilized, so that the phase morphology structure which is beneficial to the initiation of multiple crazes, the formation and development of crazes and the formation and growth of delayed cracks is utilized, the mechanical property of the polystyrene plastic is obviously improved, and finally the polystyrene plastic with ultrahigh toughness is obtained.
However, after the high-toughness modified polystyrene prepared in the scheme is actually produced and used, the high-toughness modified polystyrene is easy to crack and cause loss under a high-pressure strength package, and meanwhile, the problem of aging is easy to occur because the use environment is mostly open air; in view of this, we propose a method for improving the toughness of modified particles.
Disclosure of Invention
The invention aims to provide a manufacturing method capable of improving the toughness of modified particles (polystyrene) and the use strength of products aiming at the problems in the background technology.
The technical scheme of the invention is as follows: the modified particle comprises the following raw materials in parts by mass: 48-78 parts of polystyrene, 12-27 parts of polyphenyl ether, 3-9 parts of antioxidant, 6-9 parts of white oil, 0.5-2 parts of reinforcing agent and 0.5-0.8 part of ultraviolet absorbent.
Preferably, the polystyrene needs to be modified before use, and the modification process comprises the following steps: heating polystyrene resin to a molten state, adding the modified nano-alumina and the compatilizer into the molten polystyrene, and stirring and mixing uniformly; and (3) blending, banburying and extruding the mixed polystyrene, modified nano-alumina and compatilizer to obtain the modified polystyrene.
Preferably, the compatibilizer is a maleic anhydride grafted compatibilizer, and the preparation method of the maleic anhydride grafted compatibilizer comprises the following steps: and plasticating the maleic anhydride and the rubber or the elastomer to obtain a plasticated material, and banburying the plasticated material and an initiator to obtain the maleic anhydride grafted compatilizer.
Preferably, the reinforcing agent is any one of ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer or a combination of the two, the ultraviolet absorbent adopts phenyl salicylate, and the main component of the phenyl salicylate is phenyl o-hydroxybenzoate.
Preferably, the modified particles comprise the following raw materials in parts by mass: 48 parts of polystyrene, 12 parts of polyphenyl ether, 3 parts of antioxidant, 6 parts of white oil, 0.5 part of reinforcing agent and 0.5 part of ultraviolet absorbent.
Preferably, the modified particles comprise the following raw materials in parts by mass: 58 parts of polystyrene, 17 parts of polyphenyl ether, 5 parts of antioxidant, 7 parts of white oil, 1 part of reinforcing agent and 0.6 part of ultraviolet absorbent.
Preferably, the modified particles comprise the following raw materials in parts by mass: 68 parts of polystyrene, 22 parts of polyphenyl ether, 7 parts of antioxidant, 8 parts of white oil, 1.5 parts of reinforcing agent and 0.7 part of ultraviolet absorbent.
Preferably, the modified particles comprise the following raw materials in parts by mass: 78 parts of polystyrene, 27 parts of polyphenyl ether, 9 parts of antioxidant, 9 parts of white oil, 2 parts of reinforcing agent and 0.8 part of ultraviolet absorbent.
The scheme also provides a method for improving the toughness of the modified particles, which specifically comprises the following preparation processes:
the method comprises the following steps: modifying polystyrene serving as a raw material to obtain modified polystyrene, and putting all the raw materials except the reinforcing agent into a mixer for mixing to obtain a raw material mixture;
step two: the raw material mixture and the reinforcing agent are both put into a mixing roll for hot melt mixing, the mixture is extruded by an extruder after being mixed for 3 hours to obtain an extruded material, and the extruded material is put into the mixing roll for secondary hot melt mixing and is extruded by the extruder in sequence;
step three: and cutting and cooling the extruded material to obtain the final high-toughness polystyrene particles.
Preferably, the hot melting temperature in the mixing mill is 170-175 ℃, and the secondary mixing time is 1.5h.
Compared with the prior art, the invention has the following beneficial technical effects:
before the polystyrene particles are modified totally, the polystyrene resin is primarily improved, so that the processing performance of the modified polystyrene is improved, the maleic anhydride grafted compatilizer enables the material to have high polarity and reactivity, the modified effect surface has high strength and high tensile resistance, when the modified polystyrene is modified again, the brittleness of the plastic after curing can be effectively reduced through the use of reinforcing agents of ethylene-vinyl acetate copolymer and acrylonitrile-butadiene-styrene copolymer, the impact strength and the elongation are improved, and when the polystyrene product is used under the illumination of light, the performance of the polystyrene product is prevented from being changed and the irradiation of harmful ultraviolet rays of the sunlight is resisted, so that the service life of the product is prolonged;
in the preparation process for improving the modified particles, the two-time hot melting time is accurately controlled, the extruded material is not cut after the first hot melting, the second hot melting is directly carried out, and the cross-linking mixing effect of the material is improved, so that the toughness is improved, and the tensile resistance is enhanced;
the invention effectively modifies polystyrene material particles, greatly improves the toughness of the particles, solves the problems that the general polystyrene particles are easy to crack and the use scene is limited, expands the use functionality of the modified polystyrene, and has the effects of high strength and high toughness.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example one
The invention provides modified particles, which comprise the following raw materials in parts by mass: 48 parts of polystyrene, 12 parts of polyphenyl ether, 3 parts of antioxidant, 6 parts of white oil, 0.5 part of reinforcing agent and 0.5 part of ultraviolet absorbent;
before the polystyrene is used, modification is needed, and the modification process comprises the following steps: heating polystyrene resin to a molten state, adding the modified nano-alumina and the compatilizer into the molten polystyrene, and stirring and mixing uniformly; mixing the mixed polystyrene, modified nano alumina and compatilizer, banburying and extruding to obtain modified polystyrene; the compatilizer is maleic anhydride grafted compatilizer, and the preparation method of the maleic anhydride grafted compatilizer comprises the following steps: plasticating maleic anhydride and rubber or elastomer to obtain a plasticated material, and banburying the plasticated material and an initiator to obtain a maleic anhydride grafted compatilizer; the reinforcing agent is one of ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer or their composition, and the ultraviolet absorbent is phenyl salicylate as main component and phenyl o-hydroxybenzoate as main component.
The embodiment also provides a method for improving the toughness of the modified particles, which specifically comprises the following preparation processes:
the method comprises the following steps: modifying raw material polystyrene to obtain modified polystyrene, and putting all raw materials except the reinforcing agent into a mixer for mixing to obtain a raw material mixture;
step two: the raw material mixture and the reinforcing agent are both put into a mixing roll for hot melt mixing, the mixture is extruded by an extruder after being mixed for 3 hours to obtain an extruded material, the extruded material is put into the mixing roll for secondary hot melt mixing and is extruded by the extruder in sequence, the hot melt temperature in the mixing roll is 175 ℃, and the secondary mixing time is 1.5 hours;
step three: and cutting and cooling the extruded material to obtain the final high-toughness polystyrene particles.
Example two
Compared with the first embodiment, the modified particle toughness provided by the invention further comprises the following raw materials in parts by mass: 58 parts of polystyrene, 17 parts of polyphenyl ether, 5 parts of antioxidant, 7 parts of white oil, 1 part of reinforcing agent and 0.6 part of ultraviolet absorbent;
before the polystyrene is used, modification is needed, and the modification process comprises the following steps: heating polystyrene resin to a molten state, adding the modified nano-alumina and the compatilizer into the molten polystyrene, and stirring and mixing uniformly; mixing the mixed polystyrene, the modified nano-alumina and the compatilizer, banburying and extruding to obtain modified polystyrene; the compatilizer is maleic anhydride grafted compatilizer, and the preparation method of the maleic anhydride grafted compatilizer comprises the following steps: plasticating maleic anhydride and rubber or elastomer to obtain a plasticated material, and banburying the plasticated material and an initiator to obtain a maleic anhydride grafted compatilizer; the reinforcing agent is one of ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer or their composition, and the ultraviolet absorbent is phenyl salicylate as main component and phenyl o-hydroxybenzoate as main component.
The embodiment also provides a method for improving the toughness of the modified particles, which specifically comprises the following preparation processes:
the method comprises the following steps: modifying polystyrene serving as a raw material to obtain modified polystyrene, and putting all the raw materials except the reinforcing agent into a mixer for mixing to obtain a raw material mixture;
step two: the raw material mixture and the reinforcing agent are both put into a mixing roll for hot melt mixing, the mixture is extruded by an extruder after being mixed for 3 hours to obtain an extruded material, the extruded material is put into the mixing roll for secondary hot melt mixing and is extruded by the extruder in sequence, the hot melt temperature in the mixing roll is 175 ℃, and the secondary mixing time is 1.5 hours;
step three: and cutting and cooling the extruded material to obtain the final high-toughness polystyrene particles.
EXAMPLE III
Compared with the first embodiment or the second embodiment, the modified particle provided by the invention further comprises the following raw materials in parts by mass: 68 parts of polystyrene, 22 parts of polyphenyl ether, 7 parts of antioxidant, 8 parts of white oil, 1.5 parts of reinforcing agent and 0.7 part of ultraviolet absorbent;
before the polystyrene is used, modification is needed, and the modification process comprises the following steps: heating polystyrene resin to a molten state, adding the modified nano-alumina and the compatilizer into the molten polystyrene, and stirring and mixing uniformly; mixing the mixed polystyrene, the modified nano-alumina and the compatilizer, banburying and extruding to obtain modified polystyrene; the compatilizer is maleic anhydride grafted compatilizer, and the preparation method of the maleic anhydride grafted compatilizer comprises the following steps: plasticating maleic anhydride and rubber or elastomer to obtain a plasticated material, and banburying the plasticated material and an initiator to obtain a maleic anhydride grafted compatilizer; the reinforcing agent is one of ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer or their composition, and the ultraviolet absorbent is phenyl salicylate as main component and phenyl o-hydroxybenzoate as main component.
The embodiment also provides a method for improving the toughness of the modified particles, which specifically comprises the following preparation processes:
the method comprises the following steps: modifying raw material polystyrene to obtain modified polystyrene, and putting all raw materials except the reinforcing agent into a mixer for mixing to obtain a raw material mixture;
step two: the raw material mixture and the reinforcing agent are both put into a mixing roll for hot melt mixing, the mixture is extruded by an extruder after being mixed for 3 hours to obtain an extruded material, the extruded material is put into the mixing roll for secondary hot melt mixing and is extruded by the extruder in sequence, the hot melt temperature in the mixing roll is 175 ℃, and the secondary mixing time is 1.5 hours;
step three: and cutting and cooling the extruded material to obtain the final high-toughness polystyrene particles.
Example four
Compared with the first embodiment, the second embodiment or the third embodiment, the modified particle provided by the invention further comprises the following raw materials in parts by mass: 78 parts of polystyrene, 27 parts of polyphenyl ether, 9 parts of antioxidant, 9 parts of white oil, 2 parts of reinforcing agent and 0.8 part of ultraviolet absorbent;
before the polystyrene is used, modification is needed, and the modification process comprises the following steps: heating polystyrene resin to a molten state, adding the modified nano-alumina and the compatilizer into the molten polystyrene, and stirring and mixing uniformly; mixing the mixed polystyrene, modified nano alumina and compatilizer, banburying and extruding to obtain modified polystyrene; the compatilizer is maleic anhydride grafted compatilizer, and the preparation method of the maleic anhydride grafted compatilizer comprises the following steps: plasticating maleic anhydride and rubber or elastomer to obtain a plasticated material, and banburying the plasticated material and an initiator to obtain a maleic anhydride grafted compatilizer; the reinforcing agent is one of ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer or their composition, and the ultraviolet absorbent is phenyl salicylate as main component and phenyl o-hydroxybenzoate as main component.
The embodiment also provides a method for improving the toughness of the modified particles, which specifically comprises the following preparation processes:
the method comprises the following steps: modifying polystyrene serving as a raw material to obtain modified polystyrene, and putting all the raw materials except the reinforcing agent into a mixer for mixing to obtain a raw material mixture;
step two: the raw material mixture and the reinforcing agent are both put into a mixing roll for hot melt mixing, the mixture is extruded by an extruder after being mixed for 3 hours to obtain an extruded material, the extruded material is put into the mixing roll for secondary hot melt mixing and is extruded by the extruder in sequence, the hot melt temperature in the mixing roll is 175 ℃, and the secondary mixing time is 1.5 hours;
step three: and cutting and cooling the extruded material to obtain the final high-toughness polystyrene particles.
The modified polystyrene particles prepared in examples one to four of the present schemes and the general-purpose polystyrene particles (as comparative examples) were tested for various properties, including the following tests: and (3) testing mechanical properties: the stretching test is carried out according to the standard of ASTM D638-01, and the stretching speed is 10mm/min; the bending test is carried out according to the standard of ASTM D790-03, and the pressing speed of the load is 5mm/min; the impact test was according to ASTM D265-00. The data obtained are shown in the following table:
the test data table shows that the tensile strength, the elongation at break, the impact strength and the bending strength of the modified polystyrene particles in the scheme are all higher than those of the general polystyrene in the market.
The above embodiments are only some preferred embodiments of the present invention, and many alternative modifications and combinations of the above embodiments may be made by those skilled in the art based on the technical solution of the present invention and the related teachings of the above embodiments.
Claims (10)
1. A modified particle, characterized by: the composite material comprises the following raw materials in parts by mass: 48-78 parts of polystyrene, 12-27 parts of polyphenyl ether, 3-9 parts of antioxidant, 6-9 parts of white oil, 0.5-2 parts of reinforcing agent and 0.5-0.8 part of ultraviolet absorbent.
2. The modified particle of claim 1, wherein the polystyrene is modified before use by a process comprising: heating polystyrene resin to a molten state, adding the modified nano-alumina and the compatilizer into the molten polystyrene, and stirring and mixing uniformly; and (3) blending, banburying and extruding the mixed polystyrene, modified nano-alumina and compatilizer to obtain the modified polystyrene.
3. The modified particle of claim 2, wherein the compatibilizer is a maleic anhydride grafted compatibilizer prepared by the method comprising: and plasticating the maleic anhydride and the rubber or the elastomer to obtain a plasticated material, and banburying the plasticated material and an initiator to obtain the maleic anhydride grafted compatilizer.
4. The modified particle of claim 1, wherein the reinforcing agent is selected from one of ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer or a combination of the two, the ultraviolet absorber is phenyl salicylate, and the main component of the phenyl salicylate is phenyl ortho-hydroxybenzoate.
5. The modified particle of claim 1, comprising the following raw materials in parts by mass: 48 parts of polystyrene, 12 parts of polyphenyl ether, 3 parts of antioxidant, 6 parts of white oil, 0.5 part of reinforcing agent and 0.5 part of ultraviolet absorbent.
6. The modified particle of claim 1, comprising the following raw materials in parts by mass: 58 parts of polystyrene, 17 parts of polyphenyl ether, 5 parts of antioxidant, 7 parts of white oil, 1 part of reinforcing agent and 0.6 part of ultraviolet absorbent.
7. The modified particle of claim 1, comprising the following raw materials in parts by mass: 68 parts of polystyrene, 22 parts of polyphenyl ether, 7 parts of antioxidant, 8 parts of white oil, 1.5 parts of reinforcing agent and 0.7 part of ultraviolet absorbent.
8. The modified particle of claim 1, comprising the following raw materials in parts by mass: 78 parts of polystyrene, 27 parts of polyphenyl ether, 9 parts of antioxidant, 9 parts of white oil, 2 parts of reinforcing agent and 0.8 part of ultraviolet absorbent.
9. The method for improving the toughness of the modified particles is characterized by comprising the following preparation processes:
the method comprises the following steps: modifying raw material polystyrene to obtain modified polystyrene, and putting all raw materials except the reinforcing agent into a mixer for mixing to obtain a raw material mixture;
step two: the raw material mixture and the reinforcing agent are both put into a mixing roll for hot melt mixing, the mixture is extruded by an extruder after being mixed for 3 hours to obtain an extruded material, and the extruded material is put into the mixing roll for secondary hot melt mixing and is extruded by the extruder in sequence;
step three: and cutting and cooling the extruded material to obtain the final high-toughness polystyrene particles.
10. The method for improving the toughness of the modified particles, according to claim 9, wherein the hot melting temperature in the mixer is 170-175 ℃, and the secondary mixing time is 1.5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568657.4A CN115286876A (en) | 2021-12-21 | 2021-12-21 | Method for improving toughness of modified particles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568657.4A CN115286876A (en) | 2021-12-21 | 2021-12-21 | Method for improving toughness of modified particles |
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| CN115286876A true CN115286876A (en) | 2022-11-04 |
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