CN113930042B - SEBS/TPU alloy material and application thereof - Google Patents

SEBS/TPU alloy material and application thereof Download PDF

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CN113930042B
CN113930042B CN202010601069.5A CN202010601069A CN113930042B CN 113930042 B CN113930042 B CN 113930042B CN 202010601069 A CN202010601069 A CN 202010601069A CN 113930042 B CN113930042 B CN 113930042B
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sebs
alloy material
tpu
structural unit
butadiene
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CN113930042A (en
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梁红文
严绍敏
刘朝周
杨帆
苏滢
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China Petroleum and Chemical Corp
Sinopec Baling Co
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Sinopec Baling Co
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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
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
    • C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • 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
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/04—Reduction, e.g. hydrogenation
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    • 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • 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
    • C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2353/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
    • 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
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • 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
    • C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract

The invention discloses an SEBS/TPU alloy material and application thereof, and the SEBS/TPU alloy material comprises the following components in percentage by mass: 50% -95% of SEBS and 50% -5% of TPU, wherein the SEBS is a random block copolymer obtained by carrying out random copolymerization on styrene/butadiene, then carrying out selective hydrogenation on double bonds of polybutadiene, and the random block copolymer has good compatibility with polar TPU, and after direct mixing, the SEBS/TPU alloy material can be obtained by mixing and extrusion.

Description

SEBS/TPU alloy material and application thereof
Technical Field
The invention relates to an SEBS/TPU alloy material and application thereof, and belongs to the technical field of high polymer materials.
Background
SEBS is the hydrogenated product of the thermoplastic elastomer SBS, often referred to as hydrogenated SBS. The structure becomes polystyrene (S) -polyethylene (E) -polybutene (B) -polystyrene (S) after hydrogenation, and is abbreviated as SEBS. The SEBS molecule has excellent weather resistance, thermal oxidation aging resistance and compression deformation resistance because the carbon-carbon double bond is saturated by hydrogenation. Each SEBS molecular chain consists of a polystyrene block and a polybutene block, the polystyrene block and the polybutene block are incompatible at normal temperature and are in a phase separation state, the polystyrene block and the polybutene block are in an elastomer characteristic of a polyethylene-butene rubber section at normal temperature, and the polystyrene block is in a plastic characteristic when heated, and the special structure endows the SEBS with the characteristics that the SEBS is elastic at normal temperature and plastic is in plastic when heated. Has the advantages of no need of vulcanization, easy processing, recycling, etc. Is widely applied to the fields of sealing strips, wire and cable coating materials, medical materials and the like.
TPU (Thermoplastic polyurethanes), thermoplastic polyurethane elastomer rubber, is a linear block copolymer, and is reversible in intermolecular hydrogen bonding crosslinking or macromolecular light crosslinking with increasing or decreasing temperature, so that the TPU has elasticity, excellent processability, excellent scratch resistance, low-temperature bending property and printability of the rubber, but has the defects of poor aging resistance and insufficient processability.
The traditional SEBS molecular chain does not contain polar or reactive groups, and has poor compatibility with polar engineering plastics such as polyurethane, polyamide, polyester and the like.
The application field of SEBS, especially the engineering plastic modification field, is limited to a large extent, and the traditional SEBS cannot be directly compatible with TPU.
In order to further optimize the performance of the SEBS and widen the application field of the SEBS, a great deal of work is done by a plurality of researchers to carry out polarity improvement on the traditional SEBS, and the main directions at present are sulfonation, acetylation, carboxylation, chloromethylation, hydroxymethylation of a PS section, maleation of an EB section, esterification of acrylic esters and the like, so as to carry out free radical initiated graft copolymerization modification.
Chinese patent (CN 1676539 a) discloses a polarized SDS and a method for preparing the same. Specifically disclosed is a tetrablock copolymer SDSP, wherein S represents a styrene block, D represents a butadiene block or a polyisoprene block, P represents a tetrapolar block, and the polar block is obtained by polymerizing a polar monomer of vinyl pyridine and derivatives thereof; the polar block content by weight in the polymer is 0.1% -50%; the S/D ratio in the SDS chain segment is 5% -95%/95% -5%; the number average molecular weight of the product is 1 ten thousand to 30 ten thousand, and the molecular weight distribution index is 1.02 to 2.00. The preparation method is that in the SDS production process, after the three-stage polymerization is completed, vinyl pyridine and derivative monomers thereof are added, and the fourth-stage polymerization is carried out for 1-120 minutes at the temperature of-10 ℃ to 100 ℃ to obtain the product.
Chinese patent (CN 1749290 a) discloses a polarized SEBS and a preparation method thereof. Specifically disclosed is a method for synthesizing polar SEBS with a structure of SEBS-P, wherein S represents a polystyrene block, EB represents a hydrogenated block of polybutadiene, P represents a polar block, and the polar block is obtained from a vinyl pyridine and methacrylate polar monomer polymer; the preparation method comprises the steps of taking butyl lithium as an initiator, tetrahydrofuran as an activator and cyclohexane as a solvent, preparing the SBS-P tetrablock polymer, and then carrying out polarity selective hydrogenation to obtain the polarized SEBS.
Chinese patent (CN 103030749A) discloses a SEBS grafted N-substituted maleimide and a preparation method thereof. Solves the technical problem of poor compatibility of SEBS and polar polymer and inorganic flame retardant. The SEBS grafted N-substituted maleimide, an initiator and an antioxidant are prepared. The method comprises the following steps: 1. dissolving N-substituted maleimide, an initiator and an antioxidant in acetone, and spraying the mixture into SEBS resin to obtain a mixture raw material; 2. and (3) introducing the mixture raw material obtained in the step (A) into a hopper of a double-screw extruder, stopping melt extrusion, granulating, and obtaining the N-substituted maleimide.
Chinese patent (CN 104419009 a) discloses a SEBS graft copolymer and a method for preparing the same. The SEBS graft copolymer consists of hydrogenated styrene-butadiene-styrene copolymer, ethylenediamine tetraacetic acid dianhydride, a reaction promoter, an initiator, an initiation auxiliary agent, an antioxidant and lubricating oil in parts by weight.
In order to improve the compatibility of SEBS, polar materials and inorganic fillers, the prior art mainly introduces a polar monomer through reaction, and the SEBS can be modified through chemical reaction to improve the compatibility of the SEBS and certain engineering plastics, but the process technology is complex and the cost is higher.
Disclosure of Invention
In view of the shortcomings of the prior art, a first object of the present invention is to provide an SEBS/TPU alloy material.
A second object of the invention is to provide the use of an SEBS/TPU alloy material.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention discloses an SEBS/TPU alloy material, which comprises the following components in percentage by mass: 50% -95% of hydrogenated styrene/butadiene (SEBS), 50% -5% of TPU; the SEBS comprises a styrene structural unit shown in a formula 1, a butadiene structural unit shown in a formula 2 and a butadiene structural unit shown in a formula 3,
wherein the content of the styrene structural unit is 20-50% based on the total amount of the copolymer.
Preferably, the content of the styrene-based structural unit is 20 to 35% based on the total amount of the copolymer.
Preferably, the content of the hydrogenated butadiene structural unit represented by formula 3 is 10 to 30%, preferably 12 to 25%, based on the total amount of the butadiene structural units represented by formula 2 and the butadiene structural unit represented by formula 3.
Preferably, the styrene structural units have a degree of randomness in the butadiene structural units of from 35 to 70%.
Preferably, the hydrogenation degree of butadiene in the copolymer is more than or equal to 95%.
The SEBS/TPU alloy material has the number average molecular weight of 6-20 ten thousand, preferably 6-15 ten thousand. The number average molecular weight was determined by gel chromatography.
The invention relates to an SEBS/TPU alloy material, which is prepared by the following steps: under the condition of no oxygen and no water, adding styrene monomer, butadiene monomer, polymerization solvent, molecular structure regulator and alkyl lithium initiator into polymerization kettle to make random copolymerization reaction, then adding cocatalyst and nickel-series main catalyst or titanium-series main catalyst, and making selective hydrogenation reaction in the presence of hydrogen so as to obtain the invented product.
In the present invention, the polymerization reaction may be carried out in various polymerization solvents commonly used in the art, and is not particularly limited, and may be, for example, hydrocarbon solvents. In general, the polymerization solvent may be selected from linear or branched or cyclic alkanes of C3 to C20, preferably from linear or branched alkanes or cyclic alkanes of C4 to C20, more preferably from at least one of n-butane, isobutane, n-pentane, cyclopentane, n-hexane, cyclohexane, n-heptane, n-octane, n-nonane, n-decane, octane, further preferably one or more of cyclopentane, cyclohexane, n-hexane. The amount of the polymerization solvent used in the present invention is not particularly limited and is a conventional choice in the art.
Preferably, the alkyl lithium initiator is at least one of n-butyllithium and sec-butyllithium.
Preferably, the alkyl lithium initiator is used in an amount of 0.5mmol to 3mmol relative to 100g of the polymerized monomer (total amount of styrene monomer and butadiene monomer).
Preferably, the molecular structure regulator is a complex regulator of more than two lewis bases, wherein one lewis base is selected from tetrahydrofuran, the other lewis base is selected from tertiary amine compounds and/or other ether compounds, and the other ether compounds are selected from one or more of diethyl ether, anisole, dioxane, dimethoxyethane, diethylene glycol dimethyl ether, ethylene glycol dibutyl ether, tetrahydrofurfural ethyl ether, divinyl ether, ethylene glycol ethyl tert-butyl ether, ethylene glycol propyl tert-butyl ether, ethylene glycol methyl tert-butyl ether, ditetrahydrofurfuryl propane, triethylamine, tetramethyl ethylenediamine, N-methylmorpholine and the like.
Further preferably, the tetrahydrofuran is 80% by weight or more, preferably 95% by weight or more of the total amount of the molecular structure modifier.
Further preferably, the total concentration of the molecular structure regulator in the solvent system is preferably 350-650mg/kg.
In the present invention, the amount of the molecular structure modifier and the random copolymerization reaction temperature are key factors for controlling the degree of randomness, so that the total amount of the molecular structure modifier is controlled to be 350-650mg/kg, and the THF amount is controlled to be more than 80 wt%, preferably more than 95 wt% of the total amount of the molecular structure modifier in the synthesis process.
Preferably, the random copolymerization reaction time is 45 to 120 minutes, preferably 60 to 90 minutes.
For the selective hydrogenation, the existing method can be employed to hydrogenate the double bonds of the conjugated diene and not the double bonds in the benzene ring.
Preferably, the cocatalyst is used in an amount of 8mg to 129mg per 100g of polymer.
Preferably, the procatalyst is used in an amount of 17mg to 200mg per 100g of polymer.
Wherein, the amount of the polymer can be calculated according to the monomer feeding amount.
The cocatalyst is one or more of alcohols and esters, preferably one or more of monohydric alcohol, polyhydric alcohol, linear alkyl ester compounds, benzoate compounds, phthalate compounds and parahydroxybenzoate compounds; further preferably one or more of C1-C10 monohydric alcohol, C2-C10 polyhydric alcohol, C2-C10 linear alkyl ester compound, C7-C15 benzoate compound, C7-C15 phthalate compound, and C7-C15 p-hydroxybenzoate compound; most preferably one or more of methanol, isooctyl alcohol, methyl benzoate, dimethyl phthalate, dibutyl phthalate.
The invention relates to an SEBS/TPU alloy material, which is prepared by the following steps: and (3) mixing SEBS and TPU according to a designed proportion to obtain a mixture, putting the mixture into a double-screw extruder, and carrying out mixing extrusion granulation to obtain the high-strength thermoplastic polyurethane elastomer.
The inventor finds that the SEBS grafted copolymer obtained by random copolymerization of the styrene/butadiene provided by the invention has good compatibility with polar TPU, and can be directly mixed and extruded to obtain the SEBS/TPU alloy material.
The invention relates to an application of an SEBS/TPU alloy material, which is used for preparing a safety glass interlayer film.
Advantageous effects
The invention provides a SEBS/TPU alloy material obtained by directly blending random copolymerization SEBS and TPU, mixing and extruding, and has simple process and low cost.
The SEBS provided by the invention can be used as a non-polar material polyolefin and the like, and can be used as an interface modifier of a polar material, so that the compatibility of the non-polar material polyolefin and the interface modifier of the polar material can be obviously improved, and the toughness of an alloy material can be improved.
The alloy material of the SEBS/TPU provided by the invention not only has good physical and mechanical properties and processing properties of a thermoplastic elastomer, but also has good compatibility and bonding properties of the TPU, polar materials and inorganic fillers. The alloy material has excellent comprehensive performance, and better meets various performance requirements of the safety glass interlayer film.
Detailed Description
To further illustrate the details of the invention, several embodiments are set forth. The following examples are intended to illustrate the present invention and are not intended to limit the scope of the invention as claimed.
The mechanical property test is carried out according to GB/T528-2009 standard; melt index testing was performed according to astm d1238 standard; the adhesion performance test uses a universal tester to test the stripping performance of glass and a safety glass adhesive film; transmittance test the transmittance in the visible light region was tested using a visible spectrophotometer.
Example 1
Preparation of SEBS:
3000mL of pure cyclohexane (water value < 20 mg/kg), tetrahydrofuran with the dosage equivalent to 550mg/kg of solvent and 15mg/kg of ditetrahydrofuran propane are added into a 5L polymerization kettle replaced by high-purity nitrogen, stirring is started, the temperature is raised to 60 ℃, 6.0mmol of n-butyllithium is added, then 240g of mixed monomer of butadiene and 60g of styrene is added, the mixed monomer is added into the polymerization kettle in a one-time mode, the reaction temperature is controlled to be lower than 100 ℃, and then the reaction is carried out for 55 minutes at 70 ℃.
The polymerized glue solution is introduced into a 5L hydrogenation kettle, the temperature is raised to 70 ℃, 4mL (0.2 mol/L) of dibutyl phthalate as a cocatalyst and 0.2g of dicyclopentadiene titanium dichloride as a main catalyst are added, hydrogen is introduced, the hydrogenation pressure is controlled at 1.5MPa, and the hydrogenation reaction is carried out for 2 hours.
After the hydrogenation reaction is finished, transferring the hydrogenated glue solution to a water washing kettle, heating to 60-65 ℃, carrying out acid washing on tertiary decanoic acid to remove metallic lithium in the glue solution, then carrying out emulsification extraction for 15min by using 300mL soft water, carrying out centrifugal separation, standing, separating out water phase, condensing residual glue solution by water vapor, and drying to obtain the hydrogenated styrene/butadiene copolymer. The properties of the copolymer are shown in Table 1.
TABLE 1 Properties of SEBS obtained in example 1
S/B 1, 2-Structure content,% Degree of hydrogenation,% Degree of randomness, percent Number average molecular weight, ten thousand
20/80 20.8 96.8 67.8 6.3
Preparation of SEBS/TPU alloy material:
according to SEBS: TPU (using a smoke table Wanhua 1570) weight ratio 95:5, weighing 1900g of SEBS and 100g of TPU in proportion, uniformly mixing in an enamel barrel, extruding by adopting a double screw, and setting the temperature of each region to be 80 ℃, 120 ℃, 180 ℃ and 160 ℃; polar dicing is carried out by adopting a water ring granulator after extrusion. After the completion of the pelletization, a small amount of sample was taken for physical and mechanical properties test (wherein the test condition of melt index was 200 ℃ C., 5 kg). The results are shown in Table 2:
TABLE 2 physical and mechanical Properties of SEBS/TPU alloy materials
Example 2
3000mL of pure cyclohexane (water value is less than 20 mg/kg), tetrahydrofuran with the dosage equivalent to 350mg/kg of solvent and tetrahydrofuran ethyl ether with the dosage equivalent to 5mg/kg of solvent are added into a 5L polymerization kettle replaced by high-purity nitrogen, stirring is started, the temperature is raised to 60 ℃, 6.0mmol of n-butyllithium is added, then 195g of mixed monomer of butadiene and 105g of styrene is added, the mixed monomer is added into the polymerization kettle in a one-time mode, the reaction temperature is controlled to be lower than 100 ℃, and then the reaction is carried out for 50 minutes at 70 ℃ to obtain polymerized glue solution.
The polymerized glue solution is introduced into a 5L hydrogenation kettle, the temperature is raised to 70 ℃, 4mL (0.2 mol/L) of dibutyl phthalate as a cocatalyst and 0.2g of dicyclopentadiene titanium dichloride as a main catalyst are added, hydrogen is introduced, the hydrogenation pressure is controlled at 1.5MPa, and the hydrogenation reaction is carried out for 2 hours.
After the hydrogenation reaction is finished, transferring the hydrogenated glue solution to a water washing kettle, heating to 60-65 ℃, carrying out acid washing on tertiary decanoic acid to remove metallic lithium in the glue solution, then carrying out emulsification extraction for 15min by using 300mL soft water, carrying out centrifugal separation, standing, separating out water phase, condensing residual glue solution by water vapor, and drying to obtain the hydrogenated styrene/butadiene copolymer.
TABLE 3 Properties of SEBS obtained in example 2
S/B 1, 2-Structure content,% Degree of hydrogenation,% Degree of randomness, percent Number average molecular weight, ten thousand
35/65 18.8 96.2 39.4 6.5
Preparation of SEBS/TPU alloy material:
according to SEBS: TPU weight ratio 50:50 g of SEBS 1500g and 1500g of TPU are weighed and mixed uniformly in an enamel barrel. Extruding by twin screws, wherein the temperature of each zone is set to 80 ℃, 120 ℃, 180 ℃ and 160 ℃; polar dicing is carried out by adopting a water ring granulator after extrusion. After the completion of the pelletization, a small amount of sample was taken for physical and mechanical properties test (wherein the test condition of melt index was 200 ℃ C., 5 kg). The results are shown in Table 4:
TABLE 4 physical and mechanical Properties of SEBS/TPU alloy materials
Comparative example 1
Traditional SEBS products (hydrogenated styrene-butadiene-styrene triblock copolymer with S/B weight ratio of 33/67,1.2-polymeric structure content 36.5-37.5%, number average molecular weight of 19.8 ten thousand)
The conventional SEBS was mixed with TPU as in example 2. Extruding by adopting a double screw, and granulating by adopting a water ring granulator after extruding. And (3) taking a small amount of granules after granulating to test physical and mechanical properties: firstly plasticating in an open mill, wherein SEBS and TPU are separated, TPU is adhered to a roll shaft, and the roll sticking phenomenon occurs; after plasticating, vulcanizing by a plate vulcanizing machine, and testing physical and mechanical properties by a pulling machine after vulcanizing, wherein a sample sheet has layering phenomenon in the stretching process.
Example 3
An appropriate amount of alloy material synthesized in example 1 and PVB are taken to prepare a safety glass interlayer film, and the specific steps are as follows: 1. plasticating by an open mill, setting the temperature to 170 ℃, and pulling out the mixture with the thickness of 0.8-1.0 after the plasticating is finished; 2. cutting a sample into strips of about 50g, respectively pressing for about 5min at the temperature of 100-150 ℃ and the pressure of 20-30MPa by using a die of 150 x 2mm plated with PTFE, decompressing and taking out, and cutting off flash by using scissors to prepare a safety glass interlayer film; 3. the prepared safety glass interlayer is subjected to testing of tensile and tearing properties, glass adhesion properties and optical performance, and the results are shown in tables 5, 6 and 7 respectively:
TABLE 5 physical and mechanical Properties of safety glass interlayer film
TABLE 6 adhesion Properties of safety glass interlayer film to glass
TABLE 7 transmittance of safety glass interlayer film
The data of the table show that each performance of the SEBS/TPU alloy material can meet the requirements of the safety glass interlayer film.

Claims (7)

1. The SEBS/TPU alloy material is characterized in that: the composition of the material in mass percent is as follows: 50% -95% of SEBS and 50% -5% of TPU; the SEBS comprises a styrene structural unit shown in a formula 1, a butadiene structural unit shown in a formula 2 and a butadiene structural unit shown in a formula 3,
wherein, the content of the styrene structural unit is 20-50% based on the total amount of the copolymer;
the content of the butadiene structural unit shown in the formula 3 is 10-30% based on the total amount of the butadiene structural unit shown in the formula 2 and the butadiene structural unit shown in the formula 3;
the number average molecular weight of the SEBS is 6-20 ten thousand;
the preparation method of the SEBS comprises the following steps: under the condition of no oxygen and no water, adding styrene monomer, butadiene monomer, polymerization solvent, molecular structure regulator and alkyl lithium initiator into polymerization kettle to make random copolymerization reaction, then adding cocatalyst and nickel-series main catalyst or titanium-series main catalyst, and making selective hydrogenation reaction in the presence of hydrogen so as to obtain the invented product.
2. The SEBS/TPU alloy material according to claim 1, wherein:
the randomness of the styrene structural unit in the butadiene structural unit is 35-70%; the hydrogenation degree of butadiene in the copolymer is more than or equal to 95 percent.
3. The SEBS/TPU alloy material according to claim 1, wherein: the alkyl lithium initiator is at least one of n-butyl lithium and sec-butyl lithium; the amount of alkyl lithium initiator is 0.5mmol to 3mmol relative to 100g of polymerized monomer.
4. The SEBS/TPU alloy material according to claim 1, wherein: the molecular structure regulator is a compound regulator of more than two Lewis bases, wherein one Lewis base is selected from tetrahydrofuran, the other Lewis bases are selected from tertiary amine compounds and/or other ether compounds, the tetrahydrofuran accounts for more than 80 weight percent of the total amount of the molecular structure regulator, and the total concentration of the molecular structure regulator in a solvent system is 350-650mg/kg.
5. The SEBS/TPU alloy material according to claim 1, wherein: the cocatalyst is used in an amount of from 8mg to 129mg per 100g of polymer; the amount of procatalyst used is 17mg to 200mg per 100g of polymer.
6. The SEBS/TPU alloy material according to claim 1, wherein: the preparation method of the alloy material comprises the following steps: and (3) mixing SEBS and TPU according to a designed proportion to obtain a mixture, putting the mixture into a double-screw extruder, and carrying out mixing extrusion granulation to obtain the high-strength thermoplastic polyurethane elastomer.
7. Use of an SEBS/TPU alloy material according to any of the claims 1-6, characterized by: the SEBS/TPU alloy material is used for preparing a safety glass interlayer film.
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