CN110294902A - A kind of stalk modification regeneration poly styrene composite material and preparation method thereof - Google Patents
A kind of stalk modification regeneration poly styrene composite material and preparation method thereof Download PDFInfo
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- CN110294902A CN110294902A CN201910472724.9A CN201910472724A CN110294902A CN 110294902 A CN110294902 A CN 110294902A CN 201910472724 A CN201910472724 A CN 201910472724A CN 110294902 A CN110294902 A CN 110294902A
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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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- 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
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The present invention provides a kind of stalk modification regeneration poly styrene composite materials and preparation method thereof, it is prepared by weight by following components: straw powder: 10-12 parts, 320-340 parts of deionized water, 35-45 parts of dodecyl sodium sulfate, polystyrene: 100 parts, polypropylene wax: 4-8 parts, initiator: 2-3 parts, decabromodiphenylethane: 10~12 parts, maleic anhydride: 0.4-0.8 parts, cumyl peroxide: 0.6-1.2 parts, phase solvent: 3-4 parts, antioxidant: 0.4-1.0 parts；Straw powder is adhered to regenerated polystyrene particle surface by polypropylene wax by the present invention, improve straw powder and regenerated polystyrene compatibility, it is uniformly mixed them, improve the mechanical property of final products, using nano modification stalk part instead of the halogenated flame retardant with contamination type, modified flame-retardant poly styrene composite material is made, reducing makes composite material be provided with good flame retardant property on the basis of the use of halogenated flame retardant.
Description
Technical field
The present invention relates to technical field of composite materials, and in particular to a kind of stalk modification regeneration poly styrene composite material and
Preparation method.
Background technique
Polystyrene is a kind of thermoplastic, and light specific gravity, elasticity are high, and finished product surface hardness is big；In addition also have
The features such as heat resistance, chemical stability, good insulating properties, is widely used in fields such as auto parts and components, household electrical appliance.
But with the development of industry, the discarding amount of polystyrene increases year by year, and in recent years, the recycling problem of waste plastic increasingly obtains
To everybody concern, many enterprises start to carry out being modified again for reclaimed materials.
But the polystyrene material of recycling causes its performance obviously to decay because of aging, degradation etc., and reclaimed materials again
In granulation process, polystyrene chain segment can be destroyed and be degraded again.Therefore in order to preferably utilize reclaimed materials, generally can to its into
Row is modified again, to improve the intensity and ageing-resistant performance of polystyrene.Glass fibre, which is currently mainly used, enhances plastics
It is modified, but it has the problem of glass emergence on the surface influences product appearance.
Existing straw powder passes through hot-forming modification regeneration polystyrene, but phase between straw powder and regenerated polystyrene
Capacitive is poor, final products poor mechanical property；In addition, regenerated polystyrene and straw powder are difficult since bulk density differs greatly
It is uniformly mixed.And straw powder, in mixing, shearing force is stronger when due to batch mixer mixing, and straw powder is easily burnt.
In addition, because the critical defect of polystyrene itself be it is inflammable, in combustion process melt drip phenomenon it is serious, and discharge
A large amount of black smokes, therefore handle to improve the safety of application fire-retardant, suppression cigarette in regenerated polystyrene modifying process, is carried out to it
Be it is very necessary, usually it is carried out it is flame-retardant modified all be added bromide fire retardant, add bromide fire retardant merely, though
Its flame retardant property so can be improved, but as additive amount increases, phenomenon of glowing is even more serious, while the based flame retardant is burning
When can release the gases such as a large amount of poisonous and hazardous gas, such as hydrogen halides, dioxin, cause secondary pollution, seriously endanger
Life security and Environmental security.
Summary of the invention
The embodiment of the invention provides a kind of stalk modification regeneration poly styrene composite materials and preparation method thereof, to solve
The compatibility of modified polystyrene composite material and stalk improves the mechanical property of composite material, while utilizing modified straw portion
Divide instead of the halogenated flame retardant with contamination type, improves the anti-flammability of modified polystyrene composite material.
In view of the above problems, technical solution proposed by the present invention is:
A kind of stalk modification regeneration poly styrene composite material, is prepared by weight by following components:
Straw powder: 10-12 parts, 320-340 parts of deionized water, 35-45 parts of dodecyl sodium sulfate, polystyrene: 100
Part, polypropylene wax: 4-8 parts, initiator: 2-3 parts, decabromodiphenylethane: 10~12 parts, maleic anhydride: 0.4-0.8 parts, peroxide
Change diisopropylbenzene (DIPB): 0.6-1.2 parts, phase solvent: 3-4 parts, antioxidant: 0.4-1.0 parts.
Further, the polypropylene wax molecular weight is 1800-2200.
Further, the antioxidant is selected from three (2,4- di-tert-butyl-phenyl) phosphite esters, four (β-(3,5- bis- uncles
Butyl -4- hydroxy phenyl) propionic acid) pentaerythritol ester, any one in the double octadecyls of thio-2 acid.
Further, the phase solvent is that maleic anhydride is grafted low-density polystyrene.
Further, the initiator is any one in potassium peroxydisulfate, potassium peroxydisulfate or ammonium persulfate.
Another object of the present invention is to provide a kind of stalk modification regeneration poly styrene composite material preparation method, wrap
Include following steps:
(1) it takes dry stalk to crush, is added in the sodium hydroxide solvent that concentration is 5-6%, in 45-65 DEG C of immersion 8-
Filtering drying after 16h；
(2) vacuum impregnation in the magnesium salt solution that concentration is 1.2-3.2molL-1 is added in the stalk after drying, then will
At 130-160 DEG C, the constant temperature 6-12h in hydrothermal reaction kettle is cooled to room temperature stalk after vacuum impregnation, takes out washing, very
Empty drying and crushing obtains a nanometer stalk；
(3) 10~12 parts of nanometer stalk, 320~340 parts of deionized water and 35~45 parts of dodecyl sulphur are taken
Sour sodium is mixed is warming up to 55~60 DEG C under an argon atmosphere, and ultrasonic disperse obtains nano modification stalk colloidal sol；
(4) 4-8 parts of 100 parts of polystyrene, polypropylene wax are taken, is added in batch mixer ,/min mixing 3- is turned with 350-450
6min；
(5) nano modification stalk colloidal sol obtained in step (3) is added in the batch mixer in step (4), ultrasound point
Dissipate, then plus 2~3 parts of initiators and 10~12 parts of decabromodiphenylethane, be mixed 35~45 minutes, surpass under an argon atmosphere
Sound dispersion；
(6) 0.4-0.8 parts of maleic anhydride are added, 0.6-1.2 parts of cumyl peroxide, compatilizer: 3-4 parts, antioxygen
0.4-1.0 parts of agent, the mixed 2-4min of height；
(7) 65~80 DEG C of progress polymerization reaction 8-10h are warming up to, and the mixture that reaction obtains is placed in mold in advance
Pressure, hot-forming straw powder modification regeneration poly styrene composite material.
Further scheme, in above-mentioned steps (7), the pressure of precompressed is 2.5-3.5mpa, time 12-32s；It is hot pressed into
The temperature of type is 150-200 DEG C, pressure 25-100mpa, time 5-10min.
Further scheme, the partial size that the stalk crushes are 160-200 mesh.
Further scheme, in above-mentioned steps (2), the magnesium salt solution is magnesium sulfate or magnesium chloride solution.
Further scheme, in above-mentioned steps (2), the vacuum impregnation processing time is 6-10h, vacuum degree 0.2Mpa.
Maleic anhydride and cumyl peroxide is added in the present invention, makes regenerated polystyrene that part cross-linking reaction occur, with
The mode of esterification and hydrogen bond is combined together with straw powder, so that polymer possesses higher mechanical property.
The present invention selects molecular weight to play the role of easy mold release and bonding, polypropylene wax for the polypropylene wax of 1800-2200
Average molecular weight cannot be too big or too small, is otherwise being not easy to adhere to straw powder in use, will appear as binder or causes to glue
Attached non-uniform problem；As lubricant in use, the problem of will appear poor lubricant effect, not easy mold release.If lubricant
Select other kinds of, lubricant effect is all poor, is not suitable for system of the present invention.
The present invention selects partial size to be modified for the straw powder of 160-200 mesh, keeps the regenerated polystyrene composition properties excellent,
Its partial size is too big or too small, composition properties can be caused poor because of easy to reunite or other reasons.
The present invention first mixes regenerated polystyrene and polypropylene wax 3-6 minutes with mixing velocity 350-450 turns/min；It closes
Suitable incorporation time and speed, it is therefore an objective to make polypropylene wax be sheared power friction overheat in mixing, fusing is uniformly adhered to
Regenerated polystyrene surface.Then add stalk colloidal sol again, it is poly- that stalk colloidal sol can be adhered to regeneration by the polypropylene wax after fusing
Styrene particles surface." binder " for connecting regenerated polystyrene and straw powder is exactly polypropylene wax.In addition, mixing velocity is not
Can be too fast, it not so will lead to part straw powder " being burnt ".It is remixed after being eventually adding other components, this uniformly mixed object
Material can store in a long time.It is used as binder if it is polypropylene wax is substituted with liquid, then must stands in a short time
It uses, cannot store.
Compared with the existing technology, the beneficial effects of the present invention are:
1, the present invention utilizes straw powder modification regeneration polyphenylacetylene combination, can not only make full use of regenerated polyphenylene second
Alkene, straw powder, turn waste into wealth, and can reduce cost with it, give increasing peasant income, and environment is made in the burning that can reduce straw powder
At pollution.
2, straw powder is adhered to regenerated polystyrene particle surface by polypropylene wax by the present invention, improves straw powder and again
Raw polystyrene compatibility, is uniformly mixed them, improves the mechanical property of final products.
3, nanometer straw powder modification regeneration poly styrene composite material prepared by the present invention tensile strength with higher, disconnected
Split elongation, bending strength, impact strength.
4, modified flame-retardant is made using nano modification stalk part instead of the halogenated flame retardant with contamination type in the present invention
Poly styrene composite material, since nano modification stalk is dispersed in polystyrene matrix with nano particle state, wherein water
The magnesium hydroxide that heat obtains can generate oxide and vapor when heat is decomposed, and vapor, which waters down, dilutes imflammable gas,
And the generation of oxide helps to make flameout, plays the role of inhibiting burning, generates protective layer and is covered in polymer
Fire source and oxygen is isolated in body surface, therefore it is good on the basis of reducing the use of halogenated flame retardant to be provided with composite material
The flame retardant property got well, while the present invention is effectively utilized agricultural wastes straw, it is made to turn waste into wealth, and creates new application valence
Value.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.
Other embodiments of the invention still elect to all optional reagents in scope of the claims.Unless otherwise instructed, institute
Stating number is mass parts.
The invention discloses a kind of stalk modification regeneration poly styrene composite material, prepared by weight by following components and
At:
Straw powder: 10-12 parts, 320-340 parts of deionized water, 35-45 parts of dodecyl sodium sulfate, polystyrene: 100
Part, polypropylene wax: 4-8 parts, initiator: 2-3 parts, decabromodiphenylethane: 10~12 parts, maleic anhydride: 0.4-0.8 parts, peroxide
Change diisopropylbenzene (DIPB): 0.6-1.2 parts, phase solvent: 3-4 parts, antioxidant: 0.4-1.0 parts.
Polypropylene wax molecular weight is 1800-2200.
Antioxidant is selected from three (2,4- di-tert-butyl-phenyl) phosphite esters, four (β-(3,5- di-tert-butyl-hydroxy phenyl)
Propionic acid) pentaerythritol ester, any one in the double octadecyls of thio-2 acid.
Phase solvent is that maleic anhydride is grafted low-density polystyrene.
Initiator is any one in potassium peroxydisulfate, potassium peroxydisulfate or ammonium persulfate.
The present invention also provides a kind of stalk modification regeneration poly styrene composite material preparation methods, specifically by following embodiment
It is illustrated:
Embodiment 1
(1) dry stalk is taken to crush, flour is 160 mesh of partial size, it is added in the sodium hydroxide solvent that concentration is 5%,
Filtering drying after 45 DEG C of immersion 16h；
(2) vacuum impregnation in the Adlerika that concentration is 1.2molL-1, vacuum impregnation is added in the stalk after drying
The processing time is 6h, vacuum degree 0.2Mpa, then by the stalk after vacuum impregnation at 130 DEG C, the constant temperature in hydrothermal reaction kettle
6h is cooled to room temperature, and takes out washing, and vacuum drying crushes to obtain nanometer stalk；
(3) 10 parts of nanometer stalk, 320 parts of deionized water and 35 parts of dodecyl sodium sulfate are taken, in argon gas gas
It is mixed under atmosphere and is warming up to 55 DEG C, ultrasonic disperse obtains nano modification stalk colloidal sol；
(4) 4 parts of 100 parts of polystyrene, polypropylene wax are taken, is added in batch mixer, with 350 turns/min mixing 3min；
(5) nano modification stalk colloidal sol obtained in step (3) is added in the batch mixer in step (4), ultrasound point
Dissipate, then plus 2 parts of potassium peroxydisulfates and 10 parts of decabromodiphenylethane, be mixed 35 minutes under an argon atmosphere, ultrasonic disperse；
(6) 0.4 part of maleic anhydride is added, 0.6 part of cumyl peroxide, maleic anhydride are grafted low-density polyphenyl second
Alkene: 3 parts, three 0.4 part of phosphite ester of (2,4- di-tert-butyl-phenyl), the mixed 2min of height；
(7) 65 DEG C of progress polymerization reaction 8h are warming up to, and the mixture that reaction obtains is placed in precompressed in mold, precompressed
Pressure is 2.5mpa, time 12s；Hot-forming temperature is 150 DEG C, pressure 25mpa, time 5min, is made of the invention
Straw powder modification regeneration poly styrene composite material.Injection molding is drawn a design, and carries out Mechanics Performance Testing, and according to UL-94 standard to changing
Property regenerated poly styrene composite material carry out flame retardant property test, the results are shown in Table 1.
Embodiment 2
(1) dry stalk is taken to crush, flour is 200 mesh of partial size, it is added in the sodium hydroxide solvent that concentration is 6%,
Filtering drying after 65 DEG C of immersion 16h；
(2) vacuum impregnation in the Adlerika that concentration is 3.2molL-1, vacuum impregnation is added in the stalk after drying
The processing time is 10h, vacuum degree 0.2Mpa, then by the stalk after vacuum impregnation at 160 DEG C, the constant temperature in hydrothermal reaction kettle
12h is cooled to room temperature, and takes out washing, and vacuum drying crushes to obtain nanometer stalk；
(3) 12 parts of nanometer stalk, 340 parts of deionized water and 45 parts of dodecyl sodium sulfate are taken, in argon gas gas
It is mixed under atmosphere and is warming up to 60 DEG C, ultrasonic disperse obtains nano modification stalk colloidal sol；
(4) 8 parts of 100 parts of polystyrene, polypropylene wax are taken, is added in batch mixer, with 450 turns/min mixing 6min；
(5) nano modification stalk colloidal sol obtained in step (3) is added in the batch mixer in step (4), ultrasound point
Dissipate, then plus 3 parts of potassium peroxydisulfates and 12 parts of decabromodiphenylethane, be mixed 45 minutes under an argon atmosphere, ultrasonic disperse；
(6) 0.8 part of maleic anhydride is added, 1.2 parts of cumyl peroxide, maleic anhydride are grafted low-density polyphenyl second
Alkene: 4 parts, four 1.0 parts of pentaerythritol ester of (β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid), the mixed 4min of height；
(7) 80 DEG C of progress polymerization reaction 10h are warming up to, and the mixture that reaction obtains is placed in precompressed in mold, precompressed
Pressure be 3.5mpa, time 32s；Hot-forming temperature is 200 DEG C, pressure 100mpa, time 10min, this hair is made
Bright straw powder modification regeneration poly styrene composite material.Injection molding is drawn a design, and carries out Mechanics Performance Testing, and according to UL-94 standard
Flame retardant property test is carried out to the poly styrene composite material of modification regeneration, the results are shown in Table 1.
Embodiment 3
(1) dry stalk is taken to crush, flour is 180 mesh of partial size, it is added in the sodium hydroxide solvent that concentration is 6%,
Filtering drying after 55 DEG C of immersion 12h；
(2) vacuum impregnation in the magnesium chloride solution that concentration is 3.2molL-1 is added in the stalk after drying, it then will be true
Sky impregnate after stalk at 145 DEG C, the constant temperature 9h in hydrothermal reaction kettle is cooled to room temperature, take out washing, vacuum drying crush
Obtain nanometer stalk；
(3) 11 parts of nanometer stalk, 330 parts of deionized water and 40 parts of dodecyl sodium sulfate are taken, in argon gas gas
It is mixed under atmosphere and is warming up to 58 DEG C, ultrasonic disperse obtains nano modification stalk colloidal sol；
(4) 6 parts of 100 parts of polystyrene, polypropylene wax are taken, is added in batch mixer, with 400 turns/min mixing 4.5min；
(5) nano modification stalk colloidal sol obtained in step (3) is added in the batch mixer in step (4), ultrasound point
Dissipate, then plus 2.5 parts of ammonium persulfates and 11 parts of decabromodiphenylethane, be mixed 40 minutes under an argon atmosphere, ultrasonic disperse；
(6) 0.6 part of maleic anhydride is added, 0.9 part of cumyl peroxide, maleic anhydride are grafted low-density polyphenyl second
Alkene: 3.5 parts, double 0.7 part of the octadecyls of thio-2 acid, the mixed 3min of height；
(7) 72 DEG C of progress polymerization reaction 9h are warming up to, and the mixture that reaction obtains is placed in precompressed in mold, precompressed
Pressure is 3mpa, time 22s；Hot-forming temperature is 175 DEG C, pressure 65mpa, time 7min, and straw of the invention are made
Stalk powder modification regeneration poly styrene composite material.Injection molding is drawn a design, and carries out Mechanics Performance Testing, and according to UL-94 standard to modification
Regenerated poly styrene composite material carries out flame retardant property test, the results are shown in Table 1.
In above-mentioned 3 embodiments:
Maleic anhydride and cumyl peroxide is all added in the embodiment of the present invention, regenerated polystyrene occurs partial cross-linked
Reaction is combined together, so that polymer possesses higher mechanical property with straw powder in a manner of esterification and hydrogen bond.
The embodiment of the present invention selects molecular weight to play the role of easy mold release and bonding for the polypropylene wax of 1800-2200, gathers
Propylene wax average molecular weight cannot be too big or too small, otherwise as binder in use, will appear be not easy to adhere to straw powder or
It causes to adhere to non-uniform problem；As lubricant in use, the problem of will appear poor lubricant effect, not easy mold release.Lubrication
If agent selection is other kinds of, lubricant effect is all poor, is not suitable for system of the present invention.
The embodiment of the present invention selects partial size to be modified for the straw powder of 160-200 mesh, and regenerated polystyrene is made to combine physical property
Can be excellent, partial size is too big or too small, composition properties can be caused poor because of easy to reunite or other reasons.
Regenerated polystyrene and polypropylene wax are first mixed 3-6 with mixing velocity 350-450 turns/min by the embodiment of the present invention
Minute；Suitable incorporation time and speed, it is therefore an objective to so that polypropylene wax is sheared power friction overheat in mixing, melt, uniformly
Be attached to regenerated polystyrene surface.Then add stalk colloidal sol again, the polypropylene wax after fusing can adhere to stalk colloidal sol
In regenerated polystyrene particle surface." binder " for connecting regenerated polystyrene and straw powder is exactly polypropylene wax.In addition, mixed
Closing speed cannot be too fast, not so will lead to part straw powder " being burnt ".It is remixed after being eventually adding other components, this mixing
Uniform material can store in a long time.Be used as binder if it is polypropylene wax is substituted with liquid, then it must be short
It uses, cannot be stored immediately in time.
In order to more preferably illustrate that straw powder modification regeneration poly styrene composite material prepared by the present invention has stronger mechanics
Performance, and to better illustrate straw powder modification regeneration poly styrene composite material prepared by the present invention with higher fire-retardant etc.
Grade, now designs following comparative example:
(1) 100 parts of regenerated polystyrenes, 15 parts of straw powders, 6 parts of paraffin waxes are weighed, 0.3 part of irgasfos 168 (three
(2,4- di-t-butyl) phenyl-phosphite), it is added in batch mixer, the mixed 2min of height；
(2) precompressed in mold, pressure 3mpa, time 22s is added in step (1) resulting material；It is hot-forming, temperature 175
DEG C, straw powder modification regeneration poly styrene composite material of the present invention is made in pressure 65mpa, time 7min, and injection molding is beaten
Sample carries out Mechanics Performance Testing, and carries out flame retardant property survey according to poly styrene composite material of the UL-94 standard to modification regeneration
Examination, the results are shown in Table 1.
Embodiment 1-3 mechanical experimental results can be seen that the present invention and be glued straw powder by polypropylene wax from table 1
It is attached to regenerated polystyrene particle surface, improves straw powder and regenerated polystyrene compatibility, is uniformly mixed them, is made final
The mechanical property of product improves, and nanometer straw powder is made by stalk, and multiple using nanometer straw powder modification regeneration polystyrene
Condensation material stretches straw powder modification regeneration poly styrene composite material prepared by the present invention tensile strength with higher, fracture
Long rate, bending strength, impact strength, mechanical property are significantly excellent in comparative example；
By flame retardant rating data result in table 1 can be seen that embodiment 1-3 using nano modification stalk part instead of
Modified flame-retardant poly styrene composite material is made, since nano modification stalk is with nanometer in halogenated flame retardant with contamination type
Graininess is dispersed in polystyrene matrix, the magnesium hydroxide that wherein hydro-thermal obtains heat decompose when can generate oxide and
Vapor, vapor, which waters down, dilutes imflammable gas, and the generation of oxide helps to make flameout, plays inhibition combustion
The effect of burning generates protective layer and is covered in polymer body surface, fire source and oxygen is isolated, therefore fire-retardant reducing halogen system
Composite material is set to be provided with good flame retardant property on the basis of the use of agent, therefore straw powder modification regeneration prepared by the present invention is poly-
Benzene composite material excellent comparative example in flame retardant property.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of stalk modification regeneration poly styrene composite material, it is characterised in that: be prepared by weight by following components:
Straw powder: 10-12 parts, 320-340 parts of deionized water, 35-45 parts of dodecyl sodium sulfate, polystyrene: 100 parts, gather
Propylene wax: 4-8 parts, initiator: 2-3 parts, decabromodiphenylethane: 10~12 parts, maleic anhydride: 0.4-0.8 parts, peroxidating two is different
Propyl benzene: 0.6-1.2 parts, phase solvent: 3-4 parts, antioxidant: 0.4-1.0 parts.
2. a kind of stalk modification regeneration poly styrene composite material according to claim 1, it is characterised in that: described poly- third
Alkene wax molecular weight is 1800-2200.
3. a kind of stalk modification regeneration poly styrene composite material according to claim 1, it is characterised in that: described is anti-
Oxygen agent is selected from three (2,4- di-tert-butyl-phenyl) phosphite esters, four (β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid) seasons penta
Any one in the double octadecyls of four alcohol esters, thio-2 acid.
4. a kind of stalk modification regeneration poly styrene composite material according to claim 1, it is characterised in that: described to mix
Agent is that maleic anhydride is grafted low-density polystyrene.
5. a kind of stalk modification regeneration poly styrene composite material according to claim 1, it is characterised in that: the initiation
Agent is any one in potassium peroxydisulfate, potassium peroxydisulfate or ammonium persulfate.
6. a kind of stalk modification regeneration poly styrene composite material preparation method, characterized by the following steps:
(1) it takes dry stalk to crush, is added in the sodium hydroxide solvent that concentration is 5-6%, after 45-65 DEG C of immersion 8-16h
Filtering drying；
(2) vacuum impregnation in the magnesium salt solution that concentration is 1.2-3.2molL-1 is added in the stalk after drying, then by vacuum
At 130-160 DEG C, the constant temperature 6-12h in hydrothermal reaction kettle is cooled to room temperature stalk after impregnating, takes out washing, and vacuum is dry
It is dry to crush to obtain nanometer stalk；
(3) 10~12 parts of nanometer stalk, 320~340 parts of deionized water and 35~45 parts of dodecyl sodium sulfonate are taken
Sodium is mixed is warming up to 55~60 DEG C under an argon atmosphere, and ultrasonic disperse obtains nano modification stalk colloidal sol；
(4) 4-8 parts of 100 parts of polystyrene, polypropylene wax are taken, is added in batch mixer ,/min mixing 3-6min is turned with 350-450；
(5) nano modification stalk colloidal sol obtained in step (3) is added in the batch mixer in step (4), ultrasonic disperse, then
Add 2~3 parts of initiators and 10~12 parts of decabromodiphenylethane, is mixed 35~45 minutes under an argon atmosphere, ultrasound point
It dissipates；
(6) 0.4-0.8 parts of maleic anhydride are added, 0.6-1.2 parts of cumyl peroxide, compatilizer: 3-4 parts, antioxidant
0.4-1.0 parts, the mixed 2-4min of height；
(7) 65~80 DEG C of progress polymerization reaction 8-10h are warming up to, and the mixture that reaction obtains is placed in precompressed in mold, heat
It is molded to obtain straw powder modification regeneration poly styrene composite material.
7. a kind of stalk modification regeneration poly styrene composite material preparation method according to claim 6, it is characterised in that:
In above-mentioned steps (7), the pressure of precompressed is 2.5-3.5mpa, time 12-32s；Hot-forming temperature is 150-200
DEG C, pressure 25-100mpa, time 5-10min.
8. a kind of stalk modification regeneration poly styrene composite material preparation method according to claim 6, it is characterised in that:
The partial size that the stalk crushes is 160-200 mesh.
9. a kind of stalk modification regeneration poly styrene composite material preparation method according to claim 6, it is characterised in that:
In above-mentioned steps (2), the magnesium salt solution is magnesium sulfate or magnesium chloride solution.
10. a kind of stalk modification regeneration poly styrene composite material preparation method according to claim 6, feature exist
In: in above-mentioned steps (2), the vacuum impregnation processing time is 6-10h, vacuum degree 0.2Mpa.
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| CN201910472724.9A CN110294902A (en) | 2019-06-01 | 2019-06-01 | A kind of stalk modification regeneration poly styrene composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112341744A (en) * | 2020-11-27 | 2021-02-09 | 内江师范学院 | Silicon carbide reinforced modified regenerated polystyrene nano composite material and preparation method and application thereof |
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Application publication date: 20191001 |