CN101230119B - Polyphenylacetylene/polyethylene alloy as well as special compatibilizer and preparation method thereof - Google Patents

Polyphenylacetylene/polyethylene alloy as well as special compatibilizer and preparation method thereof Download PDF

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CN101230119B
CN101230119B CN2008101011046A CN200810101104A CN101230119B CN 101230119 B CN101230119 B CN 101230119B CN 2008101011046 A CN2008101011046 A CN 2008101011046A CN 200810101104 A CN200810101104 A CN 200810101104A CN 101230119 B CN101230119 B CN 101230119B
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polystyrene
polyethylene
allyl group
reaction
ethene
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CN101230119A (en
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胡友良
李化毅
黄河
李金阁
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Institute of Chemistry CAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92561—Time, e.g. start, termination, duration or interruption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing

Abstract

The invention discloses polystyrene/polyethylene alloy and a special-purpose compatilizer and a preparation method thereof. The polystyrene/polyethylene alloy of the invention comprises components of the following parts by weight: 20 to 95 shares of polystyrene, 5 to 80 shares of polyethylene, and 0.5 to 20 shares of polystyrene/polyethylene graft copolymer. The polystyrene/polyethylene alloy of the invention comprises polystyrene, polyethylene, and polystyrene/polyethylene graft copolymer, all of which are blended and extruded into polymer alloy through a screw rod. The polystyrene/polyethylene alloy obtained in the invention has good mechanical properties and shock resistance, and also superior properties such as good chemicals resistance, dimensional stability, easy processing, etc.

Description

A kind of polystyrene/polyethylene alloy and special-purpose compatilizer and preparation method
Technical field
The present invention relates to a kind of polystyrene/polyethylene alloy and special-purpose compatilizer and preparation method, particularly relating to a kind of is polystyrene/polyethylene alloy of compatilizer and preparation method thereof with polyethylene/polystyrene graft copolymer (PE-g-PS).
Background technology
Polystyrene has the transparency, electrical insulating property is good, good rigidly and chemical resistance, water tolerance, tint permanence and good processing flowability, and cheap, be widely used in fields such as electronics, daily necessities, toy, automobile, building.But the shortcoming of polystyrene maximum is that impact property and toughness are relatively poor, thereby improves the impact property and the toughness of polystyrene, is to make it have the more important channel of extensive use.
Polyethylene is the universal very widely resin of a class purposes, has cheap, easily processing and to advantages such as humidity are insensitive.Wherein new LDPE (film grade) (LDPE) or linear low density polyethylene (LLDPE) are owing to the characteristic that self has high tenacity and low modulus makes them become an important toughner of polystyrene.
But because polythene material itself is nonpolar, exist adhesive property poor when making itself and polystyrene blend, problems such as consistency difference, therefore polystyrene/poly simple blend shows very poor mechanical property, especially shock strength is very low, and the consistency and the interface stability that how to improve two-phase polymer are the key points of blend preparation.Method the most effective and the most commonly used is to add the polycthylene grafted or segmented copolymer of the functionalization contain polar group as blending compatilizer, reduces two-phase interface tension force, strengthens the connection of two-phase interface, thereby obtains the uniform and stable blend of phase.
Summary of the invention
The purpose of this invention is to provide a kind of polyethylene/polystyrene graft copolymer.
Polyethylene/polystyrene graft copolymer provided by the present invention, prepare as follows: earlier with ethene with allyl group toluene is carried out polycoordination and prepares ethene/allyl group toluene multipolymer, again by lithiation with benzyl carbon lithiumation in the multipolymer, add vinylbenzene, carry out the anionic grafting polyreaction, obtain described polyethylene/polystyrene graft copolymer.
The number-average molecular weight of described polyethylene/polystyrene graft copolymer is preferably 10000-300000 in the scope of 3000-500000; Molecular weight distribution is between 1.0-5.0.In polyethylene/polystyrene graft copolymer on every polyethylene main chain grafted polystyrene side chain average number be 0.5-5, be preferably 1-4; The number-average molecular weight of polystyrene side chain is 1000-50000, is preferably 3000-30000; Styrene content is preferably 30-70wt% in the multipolymer in the scope of 10-90wt%.
Another object of the present invention provides a kind of polystyrene/polyethylene alloy and preparation method thereof.
Polystyrene/polyethylene alloy of the present invention comprises the component of following weight part:
Polystyrene 20-95,
Polyethylene 5-80,
Polyethylene of the present invention/polystyrene graft copolymer 0.5-20.
Preferably, the weight part of polyethylene/polystyrene graft copolymer is 1-15.
The preparation method of this polystyrene/polyethylene alloy, be that 20-95 weight part polystyrene, 5-80 weight account polyethylene and 0.5-20 weight part polyethylene/polystyrene graft copolymer of the present invention are mixed, dry back obtains described polystyrene/polyethylene alloy by the screw extrusion press mixing granulation.
The temperature of mixing granulation is 190-210 ℃; Time is 1-15 minute, is preferably 3-10 minute.Screw extrusion press is single screw extrusion machine or twin screw extruder.
Polystyrene of the present invention and polyethylene alloy comprise polystyrene, polyethylene and polyethylene/polystyrene graft copolymer, extrude by the screw rod blend and obtain polymer alloy.The resulting polystyrene of the present invention/poly-second alloy has mechanical property and shock resistance preferably, also has preferably chemical proofing, dimensional stability and is easy to premium properties such as processing.
Description of drawings
Fig. 1 is in the embodiment of the invention, ethene/to allyl group toluene multipolymer 1H NMR spectrogram.
Fig. 2 is in the embodiment of the invention, polycthylene grafted polystyrene copolymer 1H NMR spectrogram.
Fig. 3 is in the embodiment of the invention, adds the tensile strength comparison diagram of the blend material (PS/PE) of compatilizer and the different compositions that do not add compatilizer.
Fig. 4 is in the embodiment of the invention, and the flexural strength that adds the blend material (PS/PE) of compatilizer and the different compositions that do not add compatilizer is relatively schemed.
Fig. 5 is in the embodiment of the invention, adds the modulus in flexure comparison diagram of the blend material (PS/PE) of compatilizer and the different compositions that do not add compatilizer.
Embodiment
The preparation of first part's polyethylene/polystyrene graft copolymer (PE-g-PS)
The skeleton symbol of polyethylene/polystyrene graft copolymer of the present invention (being called PE-g-PS herein) is as follows:
Figure S2008101011046D00031
Prepare as follows: earlier with ethene with allyl group toluene is carried out polycoordination and prepares ethene/allyl group toluene multipolymer, again by lithiation with benzyl carbon lithiumation in the multipolymer, add vinylbenzene, carry out the anionic grafting polyreaction, obtain described polyethylene/polystyrene graft copolymer.Concrete:
During preparation ethene/to allyl group toluene multipolymer, used catalyzer is MgCl 2The Ziegler-Natta catalyst that contains lipid or two ethers internal electron donors of load, with the promotor of its coupling be AlR 3, AlR 2X or AlRX 2, perhaps several mixtures, wherein R is methyl, hexyl, sec.-propyl, the tertiary butyl or phenyl, X is chlorine, bromine atoms; Used catalyzer can also be a metallocene catalyst, with the promotor of its coupling be methylaluminoxane; Ethene adds continuously during polymerization, and pressure is the 1-10 normal atmosphere, is the 0.05-5 mol to the concentration of allyl group toluene, catalyst concentration is the 1-100 micromoles per liter, temperature of reaction is-20 ℃ to 150 ℃, is preferably 30 ℃-100 ℃, and the reaction solvent for use is alkanes or aromatic hydrocarbons.
Ethene/as follows to the lithiation condition of allyl group toluene multipolymer: used lithiation reagent is a n-Butyl Lithium, its consumption be ethene/in the allyl group toluene multipolymer to the unitary 0.5-20 of allyl group toluene doubly (mol ratio), be preferably 1 to 10 times (mol ratio), solvent for use is an alkane solvents, temperature of reaction is-20 ℃ to 150 ℃, be preferably 30 ℃-100 ℃, the reaction times is 0.5-24 hour, is preferably 0.5-10 hour; After reaction finished, cooling at room temperature filtered out polymkeric substance, and with reaction solvent washing copolymer repeatedly.
The reaction conditions of anionic grafting polyreaction is as follows: the vinylbenzene consumption is an ethene/to the 0.5-20 of allyl group toluene multipolymer doubly (mass ratio), the polymerization solvent for use is an alkane solvents, temperature of reaction is-20 ℃ to 150 ℃, be preferably 30 ℃-100 ℃, reaction times is 0.5-48 hour, is preferably 0.5-10 hour; After reaction finished, cooling at room temperature filtered out polymkeric substance, and with acetone or tetrahydrofuran (THF) equal solvent washing copolymer repeatedly.
The preparation of embodiment 1, polyethylene/polystyrene graft copolymer (PE-g-PS)
Used toluene refluxes to remove through sodium Metal 99.5 and anhydrates, and bubbling is 1 hour under nitrogen, removes deoxidation.Comonomer hydrolith drying, underpressure distillation goes out.
To have churned mechanically Parr reactor and be heated to 100 ℃ and vacuumized 1 hour, remove wherein steam and oxygen.Cooling, charge into ethylene gas, add 100 milliliters of toluene more successively, comonomer is to allyl group toluene (p-AT), 1 milliliter of promotor methylaluminoxane (MAO, toluene solution, 10% weight content) and 1 micromole's catalyzer hexyl abutment, two indenes zirconium dichlorides, catalyst concn is 10 micromoles per liter, Al/Zr=1400.60 ℃ of polymerization temperatures, ethylene pressure 1 normal atmosphere, polymerization time 30 minutes after polymerization finishes, use the acidic alcohol termination reaction, usefulness washing with alcohol polymkeric substance three times, gained ethene and to the multipolymer of allyl group toluene 60 ℃ of vacuum-dryings 8 hours.Ethene/to allyl group toluene multipolymer 1H NMR spectrogram spare accompanying drawing 1, therefrom can calculate the unitary content of allyl group toluene is 0.9mol%.
Under argon shield; in having the 250ml there-necked flask of reflux condensing tube, add exsiccant 2g ethene and, add exsiccant normal heptane 100ml, at room temperature stir the multipolymer and the 0.896g potassium tert.-butoxide of allyl group toluene; after treating that multipolymer is uniformly dispersed; the solution of the n-Butyl Lithium of Dropwise 5 ml (6.4M) and 20ml normal heptane under ice bath, reaction system becomes redness, after dropwising; remove ice bath; be warmed up to 80 ℃, the color burn of reaction system stirred 5 hours to scarlet.Drop to room temperature, cross the filtering polymkeric substance, with exsiccant hexane wash polymkeric substance repeatedly, unreacted butyllithium is removed.Add the 100ml normal heptane again, add 8ml vinylbenzene, 60 ℃ were stirred 24 hours down.Use the methyl alcohol termination reaction, use washing with alcohol polymkeric substance three times, polyethylene/polystyrene graft copolymer (PE-g-PS) obtains 3.96 gram PE-g-PS 60 ℃ of vacuum-dryings 8 hours.
The molecular weight of gained PE-g-PS is determined as 45300 through GPC, and molecular weight distribution is 1.7, and polystyrene content is 49wt%.According to the weightening finish of polystyrene with to the molecular weight that the allyl group content of toluene calculates the polystyrene side chain is 3300.The H NMR spectrogram of PE-g-PS is seen accompanying drawing 2.
Second section polystyrene/polyethylene alloy
The main chain of PE-g-PS is made up of alkene and polyethylene has affinity interaction preferably; And its polystyrene side chain and polystyrene have strong affinity interaction, so the PE-g-PS compatibilization that can provide, and adding PE-g-PS in polystyrene/polyethylene blend can increase polystyrene and poly consistency.
The present invention is that polystyrene is 20-95 part in the polystyrene of compatilizer and the poly alloy with PE-g-PS, and polyethylene is 5-80 part, and PE-g-PS is 0.5-20 part, is preferably 1-15 part (weight part).
In principle, all extrudable polyethylene and composition thereof all can be used for blend method of the present invention.Can select new LDPE (film grade) for use generally speaking, high density polyethylene(HDPE) and LLDPE, perhaps their combination.New LDPE (film grade) most preferably.Polyvinyl resin can particle or the form of powder use, be preferably pellet.The density of preferred linear low density polyethylene is at 0.88-0.95g/cm 3, melt flow rate (MFR) is at 0.5-50g/10min., and more preferably density is at 0.91-0.95g/cm 3, melt flow rate (MFR) is 1-30g/10min (measuring under 190 ℃ and 2.16kg loading condiction according to ASTM D 1238).
It is as follows with PE-g-PS to be that compatilizer prepares the preparation process of polystyrene/polyethylene blend: after 20-95 weight part polystyrene, 5-80 weight account polyethylene and 0.5-20 weight part compatilizer are mixed, 80 ℃ of following vacuum-dryings 4 hours, then by the screw extrusion press mixing granulation.Screw extrusion press is single screw extrusion machine or twin screw extruder, and forcing machine charging basket temperature is at 190-210 ℃, and the time of material in charging basket is 1-15 minute, is preferably 3-10 minute.
Final blend is made up of continuous matrix and disperse phase.All common additives that are used for thermoplasticity processing also can be added to this blend, as tinting material, UV absorption agent, thermo-stabilizer, static inhibitor etc.
Be endowed from the polystyrene of blend and the useful performance of polyethylene two components by the goods that polystyrene/polyethylene/the compatilizer blend is made according to the present invention.Compare with the ordinary polystyrene material, blend of the present invention has higher shock strength and better processability energy.Because the performance that these are useful, blend of the present invention is highly suitable for automobile and mechanical field.
Now with following embodiment the present invention is described, they can not be construed to is to limit the scope of the invention.Except as otherwise noted, all wt in an embodiment all provides with the gross weight based on polymer alloy.
Total manufacturing procedure:
Under 80 ℃ vacuum tightness be in the vacuum drying oven of 0.1MPa with dry 4 hours of polystyrene, polyethylene and PE-g-PS, add the blend of Banbury mixer twin screw part by hopper and extrude, design temperature is 190-210 ℃, screw speed 50-60rpm.
With the material of extruding tablets press granulation, pellet under 80 ℃, vacuum tightness is in the vacuum drying oven of 0.1MPa dry 4 hours, adopts SZ-15 type hydraulic injection machine to be injection molded into the standard batten of Mechanics Performance Testing, injection pressure 100kgt/cm 3, 9.5 seconds inject time, pressurize 15 seconds, injection temperature is 200 ℃.
Polystyrene described in the embodiment is: PS (" 666 ", Beijing Yanshan Petrochemical Company), polyethylene is: PE (" 1I2A ", Beijing Yanshan Petrochemical Company).
The blend that obtains is tested following key property:
According to ASTM D790 standard test modulus in flexure.At room temperature, on Instron 3365 type universal testing machines, measure test rate 2mm/min.The tensile property of material is at room temperature according to ASTM 638 standards, measures on Instron3365 type universal testing machine, and rate of extension is 50mm/min.
Embodiment 2
Adopt above total operation, the parts by weight of polyethylene, polystyrene and compatilizer PE-g-PS are 5,95 and 0.5.
Embodiment 3-Comparative Examples 1
Identical with embodiment 2, just do not add compatilizer.
Embodiment 4
Repeat embodiment 2, the parts by weight of polyethylene, polystyrene and compatilizer PE-g-PS are 10,90 and 1.
Embodiment 5-Comparative Examples 2
Identical with embodiment 4, just do not add compatilizer.
Embodiment 6
Repeat embodiment 2, the parts by weight of polyethylene, polystyrene and compatilizer PE-g-PS are 15,85 and 1.5.
Embodiment 7-Comparative Examples 3
Identical with embodiment 6, just do not add compatilizer.
Embodiment 8
Repeat embodiment 2, the parts by weight of polyethylene, polystyrene and compatilizer PE-g-PS are 20,80 and 2.
Embodiment 9-Comparative Examples 4
Identical with embodiment 8, just do not add compatilizer.
Embodiment 10
Repeat embodiment 2, the parts by weight of polyethylene, polystyrene and compatilizer PE-g-PS are 25,75 and 2.5.
Embodiment 11-Comparative Examples 5
Repeat embodiment 10, just do not add compatilizer.
Embodiment 12-Comparative Examples 6
The polystyrene that uses in embodiment 2-11 is extruded separately under the extrusion condition of previous embodiment.
The test-results of above embodiment is listed in table 1.
Table 1
Embodiment Blend is formed (weight part) Flexural strength (MPa) Modulus in flexure (GPa) Tensile strength (MPa)
PE PS Compatilizer
2 5 95 0.5 63.4 3.2 50.9
3 5 95 0 57.4 3.1 49.7
4 5 6 7 8 9 10 10 15 15 20 20 90 90 85 85 80 80 1 0 1.5 0 2 0 55.8 45.6 48.2 40.0 43.9 41.3 3.1 2.9 2.9 2.7 2.8 2.7 48.1 44.4 45.9 43.0 42.8 40.2
10 11 25 25 75 75 2.5 0 42.4 40.3 2.8 2.7 41.1 38.9
12 0 100 0 67.3 3.2 52.7
Fig. 3-5 is respectively tensile strength, flexural strength and the modulus in flexure of above embodiment gained material and the curve of PE content, PS/PE/PE-g-PS represents the blend of polystyrene/polyethylene/PE-g-PS among the figure, and PS/PE represents polystyrene/poly blend.The result shows, compares with the blend that does not have PE-g-PS, and three mechanical properties of adding polystyrene/polyethylene alloy of PE-g-PS all increase, and illustrate that PE-g-PS has compatibilization, have improved the performance of blend.
Embodiment 13
Repeat embodiment 10, the parts by weight of polyethylene, polystyrene and compatilizer PE-g-PS are 25,75 and 5.
Embodiment 14
Repeat embodiment 10, the parts by weight of polyethylene, polystyrene and compatilizer PE-g-PS are 25,75 and 10.
Embodiment 15
Repeat embodiment 10, the parts by weight of polyethylene, polystyrene and compatilizer PE-g-PS are 25,75 and 15.
The test-results of embodiment 13-15 is listed in table 2.
Table 2
Embodiment Blend is formed (weight part) Flexural strength (MPa) Modulus in flexure (MPa) Tensile strength (MPa)
PE PS Compatilizer
10 25 75 2.5 42.4 2.8 41.1
13 25 75 5 45.2 3.0 44.4
14 25 75 10 46.2 3.1 45.0
15 25 75 15 46.5 3.2 45.4
From the data of embodiment 13-15 as can be seen, under this prescription, after the content of compatilizer surpassed 10 parts, the raising of compatibilization effect had been not clearly just.

Claims (11)

1. polystyrene/polyethylene alloy comprises the component of following weight part:
Polystyrene 20-95,
Polyethylene 5-80,
Polyethylene/polystyrene graft copolymer 0.5-20;
Described polyethylene/polystyrene graft copolymer, prepare as follows: earlier with ethene with allyl group toluene is carried out polycoordination and prepares ethene/allyl group toluene multipolymer, again by lithiation with benzyl carbon lithiumation in the multipolymer, unreacted lithiation reagent is removed in washing, add vinylbenzene, carry out the anionic grafting polyreaction, obtain described polyethylene/polystyrene graft copolymer;
The number-average molecular weight of described polyethylene/polystyrene graft copolymer is 10000-300000; Molecular weight distribution is between 1.0-5.0;
In described polyethylene/polystyrene graft copolymer on every polyethylene main chain grafted polystyrene side chain average number be 1-4; The number-average molecular weight of polystyrene side chain is 3000-30000; Styrene content is in the scope of 30-70wt% in the multipolymer.
2. polystyrene/polyethylene alloy according to claim 1 is characterized in that:
When a. preparing ethene/to allyl group toluene multipolymer: used catalyzer is MgCl 2The Ziegler-Natta catalyst that contains lipid or two ethers internal electron donors of load, with the promotor of its coupling be AlR 3, AlR 2X or AlRX 2, perhaps several mixtures, wherein R is methyl, hexyl, sec.-propyl, the tertiary butyl or phenyl, X is chlorine, bromine atoms; Ethene adds continuously during polymerization, and pressure is the 1-10 normal atmosphere, is the 0.05-5 mol to the concentration of allyl group toluene, and catalyst concentration is the 1-100 micromoles per liter, and temperature of reaction is-20 ℃ to 150 ℃, and the reaction solvent for use is alkanes or aromatic hydrocarbons;
B. ethene/as follows to the lithiation condition of allyl group toluene multipolymer: used lithiation reagent is a n-Butyl Lithium, its consumption and ethene/to being 0.5-20 to the unitary mol ratio of allyl group toluene in the allyl group toluene multipolymer: 1, solvent for use is an alkane solvents, temperature of reaction is-20 ℃ to 150 ℃, and the reaction times is 0.5-24 hour; After reaction finished, cooling at room temperature filtered out polymkeric substance, and with reaction solvent washing copolymer repeatedly;
C. the reaction conditions of anionic grafting polyreaction is as follows: vinylbenzene and ethene/to the mass ratio of allyl group toluene multipolymer are 0.5-20: 1, and the polymerization solvent for use is an alkane solvents, and temperature of reaction is-20 ℃ to 150 ℃, and the reaction times is 0.5-48 hour; After reaction finished, cooling at room temperature filtered out polymkeric substance, and with acetone or tetrahydrofuran solvent washing copolymer repeatedly.
3. polystyrene/polyethylene alloy according to claim 2 is characterized in that: among the step a, used catalyzer is a metallocene catalyst during preparation ethene/to allyl group toluene multipolymer, with the promotor of its coupling be methylaluminoxane.
4. polystyrene/polyethylene alloy according to claim 2 is characterized in that: among the described step a, temperature of reaction is 30 ℃-100 ℃.
5. polystyrene/polyethylene alloy according to claim 2, it is characterized in that: among the described step b, used lithiation reagent is a n-Butyl Lithium, its consumption and ethene/to being 1-10 to the unitary mol ratio of allyl group toluene in the allyl group toluene multipolymer: 1, temperature of reaction is 30 ℃-100 ℃, and the reaction times is 0.5-10 hour.
6. polystyrene/polyethylene alloy according to claim 2 is characterized in that: among the described step c, temperature of reaction is 30 ℃-100 ℃, and the reaction times is 0.5-10 hour.
7. according to arbitrary described polystyrene/polyethylene alloy among the claim 1-6, it is characterized in that: the weight part of described polyethylene/polystyrene graft copolymer is 1-15.
8. the preparation method of arbitrary described polystyrene/polyethylene alloy among the claim 1-6, be that 20-95 weight part polystyrene, 5-80 weight account polyethylene and 0.5-20 weight account polyethylene/polystyrene graft copolymer are mixed, dry back obtains described polystyrene/polyethylene alloy by the screw extrusion press mixing granulation;
Described polyethylene/polystyrene graft copolymer, prepare as follows: earlier with ethene with allyl group toluene is carried out polycoordination and prepares ethene/allyl group toluene multipolymer, again by lithiation with benzyl carbon lithiumation in the multipolymer, unreacted lithiation reagent is removed in washing, add vinylbenzene, carry out the anionic grafting polyreaction, obtain described polyethylene/polystyrene graft copolymer.
9. the preparation method of polystyrene/polyethylene alloy according to claim 8, it is characterized in that: the temperature of described mixing granulation is 190-210 ℃; Time is 1-15 minute.
10. the preparation method of polystyrene/polyethylene alloy according to claim 9, it is characterized in that: the time of described mixing granulation is 3-10 minute.
11. preparation method according to claim 10 is characterized in that: described screw extrusion press is single screw extrusion machine or twin screw extruder.
CN2008101011046A 2008-02-28 2008-02-28 Polyphenylacetylene/polyethylene alloy as well as special compatibilizer and preparation method thereof Expired - Fee Related CN101230119B (en)

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CN105733116B (en) * 2016-05-09 2018-11-16 安徽江淮汽车集团股份有限公司 A kind of PE-PS alloy and preparation method thereof that wear-resistant conductive is high
CN106750740B (en) * 2016-11-25 2019-03-19 广东国立科技股份有限公司 A kind of preparation method of low temperature resistant modified plastics
CN111793293A (en) * 2020-06-29 2020-10-20 上海金发科技发展有限公司 Scratch-resistant low-temperature-impact-resistant ASA resin composition and preparation method thereof

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