CN107337750A - A kind of expandable poly-styrene and preparation method thereof - Google Patents
A kind of expandable poly-styrene and preparation method thereof Download PDFInfo
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- CN107337750A CN107337750A CN201710349183.1A CN201710349183A CN107337750A CN 107337750 A CN107337750 A CN 107337750A CN 201710349183 A CN201710349183 A CN 201710349183A CN 107337750 A CN107337750 A CN 107337750A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F112/00—Homopolymers 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
- C08F112/02—Monomers containing only one unsaturated aliphatic radical
- C08F112/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F112/06—Hydrocarbons
- C08F112/08—Styrene
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use 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; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/006—Additives being defined by their surface area
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Abstract
The invention discloses a kind of expandable poly-styrene and preparation method thereof, wherein, in the expandable poly-styrene, the amount of institute's graphene-containing accounts for the 0.2wt% 1wt% of styrene monomer gross weight before polymerization.Expandable poly-styrene pressing plate shaping prepared by the present invention, obtains foam board.The flame retardant rating of foam board is reduced to 0.030~0.034W/ (mK) up to B1 levels, heat conductivity value by original 0.039~0.042W/ (mK), and drawing property brings up to 260Kpa by original 90Kpa.
Description
Technical field
It is more particularly to a kind of to compound with graphene the present invention relates to a kind of expandable poly-styrene and preparation method thereof
Polystyrol foam material and preparation method thereof, belong to high molecular polymer field.
Background technology
Expandable poly-styrene (EPS) is a kind of foamed material prepared using physical blowing means, has heat conduction system
Number is low, electrical insulating property is good, water absorption rate is low, sound insulation value is superior, antidetonation, simple protection against the tide and moulding process the advantages that, therefore quilt
It is widely used in acoustic material, packing and insulation material, especially has in building heat preservation field, expandable poly-styrene
Extraordinary application prospect, plays a part of energy-conserving and environment-protective.
Expandable poly-styrene is developed from German BASF in 1949 and has the history of more than 60 years so far, merely
EPS performance can not meet the growing life and production requirement of modern society, therefore further improve EPS property
Can, it is most important to expand its application field.Future, EPS will be in mechanical property, fire resistance, ageing-resistant performance and antistatics
Performance is improved, therefore the development of EPS study on the modification and application study to social economy has highly important meaning.
CN101891852A discloses one kind《The preparation of polystyrene/expanded graphite composite foaming material》, styrene 90-
110 parts, 200-500 mesh expanded graphite 5-10 parts, nano-aluminum hydroxide 4-6 parts, coupling agent 0.3-0.5 parts, diphenyl peroxide first
Acyl 0.1-1 parts, cumyl peroxide 0.1-0.5 parts, polyvinyl alcohol 0.1-0.3 parts, tricalcium phosphate 1-2 parts, white oil 0.3-0.8
Part, Tissuemat E 0.3-0.8 parts, stearic acid 0.1-0.3 parts, pentane 9-11 parts.Prepare the expandable polyphenyl second of above-mentioned flame retardant type
The method of alkene particle, comprises the following steps：(1) 0.3-0.8 parts white oil, 0.3- are added in the styrene monomer of 90-110 parts
0.8 part of Tissuemat E, 5-10 parts expanded graphite and 4-6 parts nano-aluminum hydroxide, 0.8-1.2 part coupling agents, are stirred until homogeneous；
(2) after, the dibenzoyl peroxide and 0.1-5 part cumyl peroxide initiators of 0.1-1 parts are added, after uniform stirring,
85 DEG C of progress pre-polymerizations are warming up to, obtain styrene/expanded graphite performed polymer, it is stand-by；(3) 90-110 parts are added in reactor
Deionized water；(4) while uniform stirring, 0.1-0.3 parts polyvinyl alcohol, 1-2 part calcium triphosphates is sequentially added, continues to stir
3-8 minutes；(5) after, the performed polymer that step (1) obtains is added in above-mentioned aqueous phase, under 400-500 revs/min of rotating speed
Stirring；(6) after, when system is warming up to 90 DEG C, constant temperature is kept for 4-6 hours, material is formed with a certain size distribution
Grain；(7) after, pentane is added, and continues to heat reaction system.But when reacting kettle inner pressure reaches 0.9-1MPa, keep
0.5-2 hours.Then, it is allowed to naturally cool to normal temperature；(8) finally, moisture is filtered off, obtains flame retardant type expandable poly-styrene
Compound particle.Graphite particle diameter used in this patented technology is larger (30-75um), it is not easy to is wrapped in styrene suspension particle
In, in addition, under the premise of low thermal conductivity, mechanical performance cannot be guaranteed.Also, technique is extremely complex, cost is high, it is difficult to really
Commercial application.
On this basis, since graphene is born, people just begin one's study and replace graphite with graphene.Graphene conduct
A kind of new nano material, since being found just with excellent optical property, thermal property, mechanical property, magnetic performance with
And good chemical stability is extensively studied.Theoretically, graphene be polymer composites preferably enhancing and
Functional material.But in the progress of reality, be but rebuffed repeatedly.Although graphene possesses the excellent property such as individual layer, conduction
Can, but itself there is also it is intrinsic the shortcomings that, make it in application process, it is difficult to be combined with other materials, it is not easy to disperse,
Hinder the performance of its performance.
So far, be compounded with the EPS material technologies of graphene it is near at first be that CN105732860A is disclosed one
Kind《The expandable poly-styrene bead and preparation method of inflatable few layer graphene》.It uses the method for electrochemistry to graphite
Electrochemical intercalation is carried out, ultrasonic vibration is carried out to it, secondary intercalation is carried out to it again afterwards, washes, is dried to obtain inflatable lack
Layer graphene.In the technology, graphene preparation technology is more complicated, and addition is more (3.5wt%-5.5wt%), and cost is high, and
And it is dispersed bad in styrene, improvement is not satisfactory.
The content of the invention
It is an object of the invention to for above-mentioned technological deficiency, there is provided a kind of graphene addition is small, performance is more superior
Compound expandable poly-styrene；
It is a further object of the present invention to provide the preparation method of above-mentioned material.
The purpose of the present invention implements by the following technical programs：
A kind of expandable poly-styrene, the amount of institute's graphene-containing account for the 0.2wt%- of styrene monomer gross weight before polymerization
1wt%.
Preferably, the amount of institute's graphene-containing account for polymerization before styrene monomer gross weight 0.3%.
The preparation method of above-mentioned expandable poly-styrene,
Comprise the following steps：
S1：First styrene, water, dispersant and graphene are mixed, stirs in a kettle, forms uniform suspension；
S2：Low temperature initiators are added in the material that S1 is well mixed, are warming up to 50-70 DEG C, add high-temperature initiator, then
When being warming up to 88-92 DEG C, dispersant is added, after isothermal reaction 5-8h, adds foaming agent, temperature is permanent after rising to 105-130 DEG C
Warm 2-6h, reaction finish；
S3：Material in reactor is taken out into filtering, dried, is produced.
Preferably, in the S1, water, the mass ratio of styrene are (1.5-3)：1, such as：1.5：1,1.6：1,1.7：1,
1.8：1,1.9：1,2：1,2.2：1,2.3：1,2.4：1,2.5：1,2.6：1,2.7：1,2.8：1,2.9：1,3：1, etc.；It is preferred that
1.5：1；
Preferably, in the S1, the amount of dispersant is the 0.3wt%-0.6wt% of styrene quality, such as：0.3wt%,
0.4wt%, 0.5wt%, 0.6wt%, etc.；It is preferred that 0.4wt%；
Preferably, in the S1, the amount of the low temperature initiators is the 1wt%-3wt% of styrene quality, such as：
1wt%, 1.1wt%, 1.3wt%, 1.5wt%, 1.6wt%, 1.7wt%, 1.9wt%, 2wt%, 2.1wt%, 2.2wt%,
2.4wt%, 2.5wt%, 2.6wt%, 2.7wt%, 2.8wt%, 2.9wt%, 2wt%, etc.；It is preferred that 1.5wt%.
Preferably, the BET value of the graphene is less than 467m2/g；It is further preferred that 187m2/ g≤BET value ＜
467m2/ g, such as 187m2/g、188m2/g、190m2/g、193m2/g、195m2/g、200m2/g、230m2/g、250m2/g、
270m2/g、290m2/g、300m2/g、315m2/g、337m2/g、350m2/g、356m2/g、370m2/g、384m2/g、400m2/g、
413m2/g、431m2/g、455m2/g、467m2/ g, etc..
It is further preferred that D50 value≤10 μm of the graphene, such as：10μm、9μm、8μm、7μm、5μm、4μm、3μ
M, 1 μm, etc..
Preferably, in the S1, the technique of the stirring is：Stirred 30 minutes with 180-350 revs/min of rotating speed.Rotating speed
Less than 180 revs/min graphenes disperse not open in polystyrene systems, when rotating speed is too high, during more than 350 revs/min, and stronger shearing
Power easily causes the aggregation of graphene polystyrene latex grain.
Preferably, in the S2, the amount of the high-temperature initiator is the 0.1wt%-0.5wt% of styrene, such as：
0.1wt%, 0.15wt%, 0.2wt%, 0.24wt%, 0.3wt%, 0.37wt%, 0.4wt%, 0.44wt%, 0.5wt%,
Deng；It is preferred that 0.4wt%.
Preferably, the dispersant is the 0.2wt%-1wt% of styrene, such as：0.2wt%, 0.25wt%,
0.3wt%, 0.33wt%, 0.4wt%, 0.5wt%, 0.51wt%, 0.6wt%, 0.68wt%, 0.7wt%, 0.8wt%,
0.82wt%, 0.9wt%, 1wt%, etc.；It is preferred that 0.4wt%.
Preferably, the foaming agent is the 8wt%-12wt% of styrene, such as：8wt%, 8.2wt%, 9wt%,
9.5wt%, 10wt%, 10.3wt%, 11wt%, 11.5wt%, 11.8wt%, 12wt%, etc.；It is preferred that 10wt%.
Preferably, in the S1 or in the S2, the dispersant be active calcium phosphate, neopelex,
Two or more compounding in polyvinyl alcohol or hydroxyethyl cellulose；Preferably use neopelex and work
Property calcium phosphate press 2：5 compounding dispersant.
Preferably, the low temperature initiators are dibenzoyl peroxide or potassium peroxydisulfate, preferably dibenzoyl peroxide.
Preferably, the high-temperature initiator is peroxidized t-butyl perbenzoate or cumyl peroxide, preferably peroxidating
T-butyl perbenzoate.
Preferably, the foaming agent is one or more mixing in butane, pentane or petroleum ether, preferably pentane.
Preferably, in the step 2), low temperature initiators are added, are heated up 60 DEG C, high-temperature initiator is added, is warming up to 90
DEG C, dispersant is added, isothermal reaction 6h, foaming agent is added, reacts 5h after being warming up to 125 DEG C.
Beneficial effect of the present invention：
(1) it is green using Microwave reduction method without using toxic chemical, and the graphene size prepared is smaller,
Particle diameter distribution is uniform；
(2) graphene is incorporated into polystyrene bead using the mode of intercalation polymeric, the reaction time is short, technique letter
It is single, it is adapted to large-scale industrial production；
(3) graphene grain size is small, is intercalation into a manner of in-situ polymerization in polystyrene bead, and graphene is in polyphenyl
High degree of dispersion in ethene, so as to ensure that good heat-insulated, the fire-retardant and mechanical properties of graphene/EPS.
(4) the foamable polyethylene pressing plate shaping that prepared by the present invention, obtains foam board.The flame retardant rating of foam board
Up to B1 levels, heat conductivity value is reduced to 0.030~0.034W/ (mK), drawing by original 0.039~0.042W/ (mK)
Performance brings up to 260Kpa by original 90Kpa.
For the essence of the further instruction present invention, applicant is by the deep anatomy of progress of the present invention.
Application resistance limit based on current graphene in EPS, the present invention passes through multidirectional further investigation, wherein in graphite
On specific surface area (BET) of alkene this direction, experiment is found, when the specific surface area (BET) of graphene is excessive, graphene and benzene second
Alkene can not form emulsion particle, and the graphene of sheet can hinder the collision of styrene free radical, so as to influence the polymerization of styrene.Enter one
Step, inventor catches this direction to carry out in-depth study, has further inquired into the pass between the BET of graphene and polymerization
System, the graphene and styrene for making every effort to filter out suitable BET are polymerize.It is found surprisingly that, BET value is less than 467m2/ g stone
Mertenyl originally can reach dispersed purpose.For example, using SE1430 types graphene (10 μm of D50 ＜, specific surface area >=
240m2/ g, the hexa-atomic element in Changzhou) and SE1231 types graphene (10 μm of D50 ＜, specific surface area >=187m2/ g, Changzhou are hexa-atomic
Element) it can be polymerize, graphene can form stable oil-in-water state with stable dispersion into styrene；And use SE1233
Type graphene (10 μm of D50 ＜, specific surface area >=467m2/ g, the hexa-atomic element in Changzhou) when, graphene and styrene can not form latex
Grain, the graphene of sheet can hinder the collision of styrene free radical, so as to influence the polymerization of styrene.As BET value ＜ 187m2/g
When, the polymerization that graphene also can be to styrene produces interference, and polymerization effect is bad.
As shown in Figure 1, 2, SE1430 (BET >=240m2/g) and SE1233 (BET >=467m2/g) type graphenes are polymerizeing
During drop electron micrograph.It can be seen that from Fig. 1, SE1430 drops are bead spheroidal particle, and graphene exists
It is wrapped in styrene droplets, it can be seen that the graphene of sheet, graphene and styrene do not form emulsion particle on Fig. 2, this
Be due to graphene BET it is excessive, the graphene of sheet can hinder the collision of styrene free radical, and graphene and styrene shape are not
Into emulsion particle, so as to influence the polymerization of styrene.
In addition, another important wisdom contribution of the present invention, polystyrene is introduced in a manner of in-situ polymerization by graphene
In, and graphene addition is few, on the one hand reduces cost, on the other hand may insure the dispersed of graphene, so as to for
Excellent graphene/the polystyrol foam material of processability provides guarantee.
Brief description of the drawings
Fig. 1 is SE1430 (BET >=240m2/ g) type graphene drop in the course of the polymerization process electron micrograph；
Fig. 2 is SE1233 (BET >=467m2/ g) type graphene drop in the course of the polymerization process electron micrograph.
Embodiment
The preferred embodiments of the present invention are illustrated below, it will be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Embodiment 1:
75 grams of styrene are sequentially added, 0.15 gram of SE1430 graphene, 112 grams of deionized waters, 0.3 gram of compounding dispersant is extremely
In reactor, mechanical agitation progress in 30 minutes is pre-dispersed, and speed of agitator is 280 revs/min, adds low temperature initiators benzoyl peroxide first
0.75 gram of acyl, is started to warm up, and is warming up to 60 DEG C and is added 0.4 gram of high-temperature initiator peroxidized t-butyl perbenzoates, it is persistently overheating extremely
90 DEG C, 0.3 gram of dispersant is added after constant temperature 30min, then isothermal reaction 5.5 hours at 90 DEG C, 6 are being added into mixture
Gram pentane, continues to be heated to 120 DEG C, constant temperature 5 hours, is cooled to 40 DEG C, discharging, washs and to be dried to obtain the present invention expandable
Polystyrene bead.
Embodiment 2:
75 grams of styrene are sequentially added, 0.30 gram of SE1430 graphene, 150 grams of deionized waters, 0.3 gram of compounding dispersant is extremely
In reactor, mechanical agitation progress in 30 minutes is pre-dispersed, and speed of agitator is 280 revs/min, adds low temperature initiators benzoyl peroxide first
0.75 gram of acyl, is started to warm up, and is warming up to 60 DEG C and is added 0.4 gram of high-temperature initiator peroxidized t-butyl perbenzoates, it is persistently overheating extremely
90 DEG C, 0.3 gram of dispersant is added after constant temperature 30min, then isothermal reaction 5.5 hours at 90 DEG C, 9 are being added into mixture
Gram pentane, continue to be heated to 120 DEG C, constant temperature 5 hours, be cooled to 40 DEG C, discharging, wash and be dried to obtain expandable polyphenyl second
Alkene bead.
Embodiment 3
75 grams of styrene are sequentially added, 0.15 gram of SE1231 graphene, 112 grams of deionized waters, 0.3 gram of compounding dispersant is extremely
In reactor, mechanical agitation progress in 30 minutes is pre-dispersed, and speed of agitator is 280 revs/min, adds low temperature initiators benzoyl peroxide first
0.75 gram of acyl, is started to warm up, and is warming up to 60 DEG C and is added 0.4 gram of high-temperature initiator peroxidized t-butyl perbenzoates, it is persistently overheating extremely
90 DEG C, 0.3 gram of dispersant is added after constant temperature 30min, then isothermal reaction 5.5 hours at 90 DEG C, 6 are being added into mixture
Gram pentane, continue to be heated to 120 DEG C, constant temperature 5 hours, be cooled to 40 DEG C, discharging, wash and be dried to obtain expandable polyphenyl second
Alkene bead.
Embodiment 4:
75 grams of styrene are sequentially added, 0.3 gram of SE1231 graphene, 150 grams of deionized waters, 0.3 gram of compounding dispersant is extremely
In reactor, mechanical agitation progress in 30 minutes is pre-dispersed, and speed of agitator is 280 revs/min, adds low temperature initiators benzoyl peroxide first
0.75 gram of acyl, is started to warm up, and is warming up to 60 DEG C and is added 0.4 gram of high-temperature initiator peroxidized t-butyl perbenzoates, it is persistently overheating extremely
90 DEG C, 0.3 gram of dispersant is added after constant temperature 30min, then isothermal reaction 5.5 hours at 90 DEG C, 9 are being added into mixture
Gram pentane, continue to be heated to 120 DEG C, constant temperature 5 hours, be cooled to 40 DEG C, discharging, wash and be dried to obtain expandable polyphenyl second
Alkene bead.
Embodiment 5:
Sequentially add 75 grams of styrene, 0.15 gram of SE1233 graphene, 112 grams of deionized waters, 0.45 gram of compounding dispersant
Into reactor, mechanical agitation progress in 30 minutes is pre-dispersed, and speed of agitator is 280 revs/min, adds low temperature initiators benzoyl peroxide
0.75 gram of formyl, is started to warm up, and is warming up to 60 DEG C and is added 0.4 gram of high-temperature initiator peroxidized t-butyl perbenzoate, persistently overheating
To 90 DEG C, add 0.3 gram of dispersant after constant temperature 30min, then isothermal reaction 5.5 hours at 90 DEG C, into mixture plus
Enter 6 grams of pentanes, continue to be heated to 120 DEG C, constant temperature 5 hours, be cooled to 40 DEG C, discharging, wash and be dried to obtain expandable poly-
Styrene beads.
Embodiment 6:
75 grams of styrene are sequentially added, 0.3 gram of SE1233 graphene, 150 grams of deionized waters, 0.45 gram of compounding dispersant is extremely
In reactor, mechanical agitation progress in 30 minutes is pre-dispersed, and speed of agitator is 280 revs/min, adds low temperature initiators benzoyl peroxide first
0.75 gram of acyl, is started to warm up, and is warming up to 60 DEG C and is added 0.4 gram of high-temperature initiator peroxidized t-butyl perbenzoates, it is persistently overheating extremely
90 DEG C, 0.3 gram of dispersant is added after constant temperature 30min, then isothermal reaction 5.5 hours at 90 DEG C, 9 are being added into mixture
Gram pentane, continue to be heated to 120 DEG C, constant temperature 5 hours, be cooled to 40 DEG C, discharging, wash and be dried to obtain expandable polyphenyl second
Alkene bead.
Embodiment 7:
Sequentially add 75 grams of styrene, 0.225 gram of SE1231 graphene, 112 grams of deionized waters, 0.3 gram of compounding dispersant
Into reactor, mechanical agitation progress in 30 minutes is pre-dispersed, and speed of agitator is 280 revs/min, adds low temperature initiators benzoyl peroxide
.125 grams of formyl chloride-1, is started to warm up, and is warming up to 60 DEG C and is added 0.3 gram of high-temperature initiator peroxidized t-butyl perbenzoate, persistently overheating
To 90 DEG C, 0.3 gram of dispersant is added after constant temperature 30min, then isothermal reaction 6 hours at 90 DEG C, are being added into mixture
7.5 grams of pentanes, continue to be heated to 125 DEG C, constant temperature 5 hours, be cooled to 40 DEG C, discharging, wash and be dried to obtain expandable poly-
Styrene beads.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (10)
- A kind of 1. expandable poly-styrene, it is characterised in that：The amount of institute's graphene-containing accounts for styrene monomer gross weight before polymerization 0.2wt%-1wt%.
- 2. expandable poly-styrene according to claim 1, it is characterised in that：The amount of institute's graphene-containing accounts for benzene before polymerization The 0.3% of vinyl monomer gross weight.
- 3. the preparation method of expandable poly-styrene according to claim 1 or 2, it is characterised in that：Comprise the following steps：S1：First styrene, water, dispersant and graphene are mixed, stirs in a kettle, forms uniform suspension；S2：Low temperature initiators are added in the material that S1 is well mixed, are warming up to 50-70 DEG C, add high-temperature initiator, then heat up During to 88-92 DEG C, dispersant is added, after isothermal reaction 5-8h, adds foaming agent, constant temperature 2- after temperature rises to 105-130 DEG C 6h, reaction finish；S3：Material in reactor is taken out into filtering, dried, is produced.
- 4. the preparation method of expandable poly-styrene according to claim 3, it is characterised in that：In the S1, water, benzene The mass ratio of ethene is (1.5-3)：1, preferably 1.5：1；And/or in the S1, the amount of dispersant is the 0.3wt%-0.6wt%, preferably 0.4wt% of styrene quality；And/or in the S1, the amount of the low temperature initiators is the 1wt%-3wt%, preferably 1.5wt% of styrene quality.
- 5. the preparation method of expandable poly-styrene according to claim 3, it is characterised in that：It is described in the S1 The amount of graphene is the 0.2wt%-1wt%, preferably 0.3wt% of styrene quality.
- 6. the preparation method of expandable poly-styrene according to claim 5, it is characterised in that：The graphene BET value is less than 467m2/ g, it is preferred that 187m2/ g≤BET value ＜ 467m2/g；It is further preferred that D50 value≤10 μm of the graphene.
- 7. the preparation method of the expandable poly-styrene according to claim any one of 3-6, it is characterised in that：The S1 In, the technique of the stirring is：Stirred 30 minutes with 180-350 revs/min of rotating speed.
- 8. the preparation method of expandable poly-styrene according to claim 3, it is characterised in that：In the S2,The amount of the high-temperature initiator is the 0.1wt%-0.5wt%, preferably 0.4wt% of styrene；And/or the 0.2wt%-1wt%, preferably 0.4wt% that the dispersant is styrene；And/or the 8wt%-12wt%, preferably 10wt% that the foaming agent is styrene.
- 9. the preparation method of expandable poly-styrene according to claim 3, it is characterised in that：It is in the S1 or described In S2, the dispersant is two kinds in active calcium phosphate, neopelex, polyvinyl alcohol or hydroxyethyl cellulose Or two or more compounding；Preferably press 2 using neopelex and active calcium phosphate：5 compounding dispersant；And/or the low temperature initiators are dibenzoyl peroxide or potassium peroxydisulfate, preferably dibenzoyl peroxide；And/or the high-temperature initiator is peroxidized t-butyl perbenzoate or cumyl peroxide, preferably perbenzoic acid The tert-butyl ester；And/or the foaming agent is one or more mixing in butane, pentane or petroleum ether, preferably pentane.
- 10. the preparation method of expandable poly-styrene according to claim 3, it is characterised in that：In the step 2), Low temperature initiators are added, are heated up 60 DEG C, add high-temperature initiator, are warming up to 90 DEG C, add dispersant, isothermal reaction 6h, then add Enter foaming agent, react 5h after being warming up to 125 DEG C.
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