CN112708192A - Polypropylene/thermoplastic elastomer blend and preparation method and application thereof - Google Patents
Polypropylene/thermoplastic elastomer blend and preparation method and application thereof Download PDFInfo
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
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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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
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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
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
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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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/18—Spheres
Abstract
The invention relates to a polypropylene/thermoplastic elastomer blend, a preparation method and application thereof, belonging to the field of plastic processing. The polypropylene/thermoplastic elastomer blend comprises the following components in parts by weight: the composite material comprises, by weight, 60-99 parts of polypropylene, 1-40 parts of hydrogenated styrene-butadiene-styrene block copolymer (SEBS) and 0.1-1 part of alpha-methylstyrene-maleic anhydride copolymerized microspheres, wherein the total weight of the polypropylene and the hydrogenated styrene-butadiene-styrene block copolymer is 100 parts. The technical scheme mainly uses polypropylene as a matrix, is blended with hydrogenated styrene-butadiene-styrene block copolymer (SEBS), is mixed with other functional additives to improve the performance, is tested after injection molding to obtain a transparent tough material with excellent optical performance and mechanical performance, has good antibacterial capability, and is suitable for application of high polymer materials in the field of packaging of medical instruments and medical products.
Description
Technical Field
The invention relates to the field of plastic processing, in particular to a polypropylene/thermoplastic elastomer blend and a preparation method and application thereof.
Background
Polypropylene (PP) is a versatile plastic with extremely wide applications, due to its abundant sources, low price, low density, good rigidity and good flowability: easy processing, and better comprehensive performance compared with other plastics, so the development of polypropylene is very rapid, and the demand for polypropylene is more and more increased particularly along with the rapid development of industries such as automobiles, household appliances, information, machinery, chemical engineering and the like. However, polypropylene itself has many disadvantages, mainly poor impact resistance, poor transparency in the aspects of packaging, daily necessities and medical appliances, which leads to aesthetic lack of appearance of products, and the disadvantages severely restrict the application of the polypropylene, therefore, in industrial production, the polypropylene is often subjected to permeability-increasing or toughening modification, which can effectively solve the contradictions. The transparency of polypropylene is generally improved by adding transparent nucleating agent, or the transparent polypropylene is directly synthesized and produced by adopting a special polymerization method. Blending with thermoplastic elastomers is another commonly used method to improve both the transparency and toughness of materials. On one hand, the toughness of the elastomer is higher than that of the matrix polypropylene, when the elastomer is distributed in a PP continuous phase as a dispersed phase to form a sea-island structure, when the blend is subjected to an external force, elastomer particles serve as stress concentration points and preferentially deform under impact, if the two-phase interface is well bonded, a large amount of silver stripes and shear bands are generated in the area where the particles are located to consume energy, and meanwhile, the elastomer particles can retard, turn and stop the development of small cracks, so that the toughness of the system is increased; on the other hand, the addition of the elastomer destroys the crystallization of PP, so that spherulites of PP are refined, and the elastomer plays a role in heterogeneous nucleation and thus plays a toughening role.
Styrenic thermoplastic elastomers can be classified into styrene and butadiene block copolymers (SBS), styrene and isoprene block copolymers (SIS), hydrogenated styrene-butadiene-styrene block copolymers (SEBS), and the like. SBS and SEBS are commonly used for PP modification. Compared with SBS, SEBS has excellent stability, heat resistance, oxidation resistance and other performance, SEBS has excellent flowability and can be used as compatibilizer of PP and reinforced material, and SEBS/PP blending system can obtain excellent performance easily.
Chinese patent with publication number CN101955609A (application number CN201010293952.9) reports a medical radiation-resistant polypropylene alloy material, which comprises one or more of polypropylene powder, SIS or SEPS (hydrogenated SIS), Ethylene Propylene Diene Monomer (EPDM) or ethylene propylene elastomer (VISTAMAXX), and the nucleating agent is sorbitol nucleating agent. The publication No. CN102311584A (application No. CN201110210602.6) reports a medical polypropylene material, which adopts homopolymerized polypropylene, sorbitol nucleating agent, POE as toughening agent, antistatic agent, etc. Chinese patent publication No. CN109320842A discloses a medical polypropylene thermoplastic elastomer and a preparation method thereof, wherein the elastomer material is prepared by extruding and granulating atactic polypropylene, rubber (ethylene propylene diene monomer), an antioxidant 626, a light stabilizer 770, calcium stearate and a nucleating agent (3988) by a twin-screw extruder. The product meets the requirements of medical polypropylene materials, and can be applied to the production of disposable medical instruments such as disposable drug infusion bags and the like.
In the middle of the packaging films or the middle of the processing equipment, the friction coefficient of the polyolefin during film processing is high, and the adhesion phenomenon is easy to occur. The opening agent, also called slipping agent, anti-blocking agent and anti-caking agent, is commonly used in the production and preparation process of plastic film material products, and can effectively improve the opening performance of the film. The slip agent improves the surface properties of the polyolefin film and reduces film-to-film friction (on a roll) and film-to-other contacting surface layers. Effectively prevent the adhesion between films and the agglomeration between granules, increase the surface smoothness of the films, prevent the dust from being attached to the surface of the product and produce a very smooth plastic finished product. The earliest opening agents were inorganic talc, diatomaceous earth, etc.; the medium-term development is to organic oleamide, erucamide, EBS derivatives and the like; common such adjuvants are typically small molecule inorganic or organic compounds. Erucamide has a lower melting point, is easy to migrate and separate out, is easy to turn yellow for a long time, and reduces the performance of the material. At present, the synthetic silicon dioxide is widely applied to films as an opening agent. The synthetic silica opening agent has better optical degree, is amorphous, can be directly used in food after being approved by FDA, meets European standards, and is a more effective opening agent. The disadvantage is high price (price 10000-70000 yuan/ton).
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention proposes a polypropylene/thermoplastic elastomer blend. In particular to a polypropylene/thermoplastic elastomer blend and a preparation method and application thereof. The technical scheme mainly uses polypropylene as a matrix, is blended with hydrogenated styrene-butadiene-styrene block copolymer (SEBS), is mixed with other functional additives to improve the performance, is tested after injection molding to obtain a transparent tough material with excellent optical performance and mechanical performance, has good antibacterial capability, and is suitable for application of high polymer materials in the field of packaging of medical instruments and medical products.
One object of the present invention is to provide a polypropylene/thermoplastic elastomer blend, which may comprise the following components in parts by weight:
based on 100 parts by weight of the total weight of the polypropylene and the hydrogenated styrene-butadiene-styrene block copolymer,
60-99 parts of polypropylene, preferably 65-99 parts; more preferably 70 to 95 parts; further preferably 75 to 90 parts;
1-40 parts of hydrogenated styrene-butadiene-styrene block copolymer (SEBS), preferably 1-35 parts; more preferably 5 to 30 parts; further preferably 10 to 25 parts;
0.1-1 part of alpha-methylstyrene-maleic anhydride copolymerized microsphere, preferably 0.2-0.7 part.
Preferably, the first and second electrodes are formed of a metal,
the polypropylene/thermoplastic elastomer blend may further comprise a nucleating agent;
the nucleating agent is used in an amount of 0.02 to 0.5 part, preferably 0.03 to 0.3 part, and preferably 0.03 to 0.15 part, based on 100 parts by weight of the total weight of the polypropylene and the hydrogenated styrene-butadiene-styrene block copolymer.
And/or the presence of a gas in the gas,
the polypropylene/thermoplastic elastomer blend may further comprise an antimicrobial agent;
the amount of the antibacterial agent is 0.1-1 part, preferably 0.3-0.8 part, based on 100 parts of the total weight of the polypropylene and the hydrogenated styrene-butadiene-styrene block copolymer.
And/or the presence of a gas in the gas,
the polypropylene/thermoplastic elastomer blend may also contain an antioxidant,
based on 100 parts by weight of the total weight of the polypropylene and the hydrogenated styrene-butadiene-styrene block copolymer,
the using amount of the antioxidant is 0.1-3 parts, preferably 0.1-1.5 parts;
the antioxidant is at least one selected from antioxidant 1010, antioxidant 168, antioxidant 1076, antioxidant 2246, antioxidant CA, antioxidant 626 and antioxidant 636, preferably one or two.
Wherein the content of the first and second substances,
the polypropylene is used as a matrix to provide mechanical strength; the hydrogenated styrene-butadiene-styrene block copolymer thermoplastic elastomer is toughened and the haze is reduced; the nucleating agent improves the mechanical property and the optical property; the alpha-methyl styrene-maleic anhydride copolymer microsphere improves the opening performance; the antimicrobial agent provides antimicrobial properties.
The melt index of the polypropylene can be 2-6 g/10min, and the polypropylene can be at least one selected from homo-polypropylene, random copolymerization polypropylene or impact copolymerization polypropylene.
The hydrogenated styrene-butadiene-styrene block copolymer may have a linear structure. Specifically, the hydrogenated styrene-butadiene-styrene block copolymer can also be selected from commercially available products commonly used in the field, preferably medical grade SEBS, such as medium petrochemical baring SEBS YH-506, medium petrochemical baring SEBS YH-688, G-1651H manufactured by Kobusta corporation, and preferably medium petrochemical baring SEBS YH-506. Preferably, the preparation method of the hydrogenated styrene-butadiene-styrene block copolymer can refer to the preparation method of the SEBS elastomer disclosed in chinese patent with publication number CN107759948A (application number CN201610687014.4) and chinese patent with publication number CN109206568A (application number CN 201710516400.1). Herein, methods for preparing SEBS elastomers disclosed in chinese patent publication No. CN107759948A (application No. CN201610687014.4) and chinese patent publication No. CN109206568A (application No. CN201710516400.1) are introduced.
Specifically, the hydrogenated styrene-butadiene-styrene block copolymer may be hydrogenated from an SBS elastomer. The SBS elastomer has the following molecular configuration: s- [ (1,2 addition unit) a- (1,4 addition unit) c- (1,2 addition unit) b- (1,4 addition unit) d]n-S, wherein: s is a polystyrene unit; a. b, c and d are all larger than 1, and have small values and basically present random distribution, (a + b)/(c + d) ═ 38-42)/(62-58); preferably, the SBS has a number average molecular weight Mn of 10 × 104～25×104. Preferably, the SBS has an S/B block ratio of (25-35)/(75-65).
The nucleating agent can be selected from
3988、
NXTM8000. At least one of Hyperform HPN-20E, VP101B, VP101T and VP 101E.
3988 is produced by Milliken, USA, and is dimethyl-substituted dibenzylidene sorbitol ("DMDBS"), 1, 3:2, 4-bis (3, 4-dimethylbenzylidene) sorbitol;
NXTM8000 for American Milliken company, sorbitol transparent nucleating agent; hyperform HPN-20E is a nucleating agent from Milliken company, USA, is a calcium dicarboxylate metal salt, and can be used for improving transparency, physical properties, barrier and sealing properties. VP101B, VP101T and VP101E (Beijing Yanshan Xin Tianze chemical Co., Ltd.) are superfine fully vulcanized powdered rubber composite nucleating agents, wherein VP101B is compounded by superfine fully vulcanized powdered rubber and sodium benzoate, VP101T is compounded by superfine fully vulcanized powdered rubber and substituted aromatic derivatives, and VP101E is compounded by superfine fully vulcanized powdered rubber and Hyperform HPN-20E.
The antibacterial agent can be selected from at least one of silver-loaded zirconium phosphate, zinc-loaded zirconium phosphate, silver-loaded sodium zirconium phosphate, zinc-loaded sodium zirconium phosphate, silver-loaded fluorite, zinc-loaded fluorite, silver-loaded activated carbon, zinc-loaded activated carbon, silver-loaded copper phosphate, zinc-loaded copper phosphate, silver-loaded calcium phosphate, zinc-loaded calcium phosphate, silver-loaded silica gel, zinc-loaded silica gel, silver-loaded hydroxyapatite and zinc-loaded hydroxyapatite, or can be selected from at least one of fully vulcanized powdered rubber compound antibacterial agents.
The alpha-methylstyrene-maleic anhydride copolymerized microsphere can be a monodisperse alpha-methylstyrene-maleic anhydride copolymer microsphere with uniform particle size.
The alpha-methylstyrene-maleic anhydride alternating copolymerization microsphere is prepared according to a preparation method disclosed in Chinese patent with the publication number of CN101580565A (with the application number of CN200910087181.5), and the molar ratio of maleic anhydride monomer to alpha-methylstyrene monomer is 4: 1-1: 4; the mass concentration of the total mass of the monomers in the dispersion polymerization reaction system is 1 to 50 percent. In the polymer microsphere dispersion system, the monodisperse microspheres have clean surfaces and controllable particle sizes. When the alpha-methyl styrene-maleic anhydride alternating copolymerization microspheres are used in the polypropylene/thermoplastic elastomer blend, the friction between the surfaces of polypropylene composition products and equipment can be effectively reduced, the adhesion and agglomeration among granules can be effectively prevented, the surface smoothness of the products can be improved, the deposition of dust on the surfaces of the products can be prevented, and the smooth plastic finished products can be produced; thereby improving the opening performance very remarkably. And compared with small molecular lubricants and opening agents, the lubricant has high melting temperature and is difficult to precipitate.
The alpha-methylstyrene-maleic anhydride alternating copolymerization microsphere can be prepared by a method comprising the following steps: under the protection of nitrogen, adding a monomer and an initiator into a medium for dissolving, reacting for 1/4-12 h at 60-90 ℃ to obtain a dispersion system of the alpha-methylstyrene and maleic anhydride polymer microspheres, and then performing centrifugal separation to obtain a white solid of the alternating copolymer of the alpha-methylstyrene and the maleic anhydride. The monomer is maleic anhydride and alpha-methyl styrene, the molar ratio of the maleic anhydride to the alpha-methyl styrene is 4: 1-1: 4, and the mass concentration of the monomer in a reaction system is 1-50%. The initiator is organic peroxide or azo compound, and the mass concentration of the initiator in the reaction system is 0.01-1%; the medium is a mixed solution of organic acid alkyl ester or ketone and alkane, wherein the volume fraction of the ketone in the mixed solution of the ketone and the alkane is 20-62.5%. The technical proposal of the method for copolymerization of alpha-methyl styrene and maleic anhydride disclosed in Chinese patent with publication number CN101580565A (application number CN200910087181.5) is introduced here.
The polypropylene/thermoplastic elastomer blend can also comprise an antioxidant, and the amount of the antioxidant can be 0.1-3 parts by weight based on 100 parts by weight of the polypropylene; the antioxidant can be at least one, preferably one or two, selected from antioxidant 1010, antioxidant 1076, antioxidant 2246, antioxidant CA, antioxidant 626 and antioxidant 636.
Another object of the present invention is to provide a process for preparing the polypropylene/thermoplastic elastomer blend, which comprises the steps of:
the polypropylene/maleic anhydride composite material is prepared by uniformly mixing the components including polypropylene, hydrogenated styrene-butadiene-styrene block copolymer, nucleating agent, antibacterial agent, antioxidant and alpha oxymethylstyrene-maleic anhydride copolymer microspheres according to the dosage, and melting and blending. The melt blend may be processed by granulation, drying, etc. as is common in the art.
Specifically, the preparation method may include the steps of:
mixing components including polypropylene, hydrogenated styrene-butadiene-styrene block copolymer, nucleating agent, antibacterial agent and alpha-methylstyrene-maleic anhydride copolymer microspheres in a high-speed stirrer for 0.5-5 minutes, setting the rotating speed of a motor to be 500-3000 rpm, mixing for 0.5-5 minutes at room temperature to obtain a uniform mixture, melting and blending through a double-screw extruder, and drawing, granulating and drying a melt through a die cutter to obtain the polypropylene/butadiene-styrene composite material. The melting temperature of the double-screw extruder can be set to be 210-230 ℃.
The reactor or the reaction equipment in the preparation method of the invention is the reactor or the reaction equipment which is common in the prior art.
The invention also aims to provide application of the polypropylene/thermoplastic elastomer blend in the fields of medical appliances, medical products, 3D printing and packaging.
The polypropylene/thermoplastic elastomer blend material has proper rigidity and flexibility, good transparency, smooth and clean surface, no adhesion and good antibacterial effect, and is particularly suitable for being applied to the fields of medical instruments and related packages.
Detailed Description
The present invention will be further described with reference to the following examples. However, the present invention is not limited to these examples.
[ Experimental Material sources ]
Polypropylene, B4908, manufactured by yanshan petrochemical company;
SEBS produced by Korotkam, USA;
silver-loaded zirconium phosphate, produced by Mianzhu chemical company;
oleamide, Crodamida VRX, manufactured by british procter;
silica, zhengzhoulong and chemical ltd;
antioxidant 1010, manufactured by basf corporation;
antioxidant 168, manufactured by basf corporation;
the preparation method of the alpha-methylstyrene-maleic anhydride copolymerized microsphere comprises the following steps: the molar ratio of maleic anhydride to alpha-methyl styrene is 1:1, wherein 0.6139g of maleic anhydride and 0.7387g of alpha-methyl styrene are contained; the initiator is AIBN, 0.0329 g; the medium is isoamyl acetate, 40mL, and the alpha-methylstyrene-maleic anhydride copolymer microspheres are obtained by heating in a water bath and reacting for 6 hours at the temperature of 70 ℃.
[ examples 1 to 4 ] and comparative examples 1 to 3 ]
Preparation examples of Polypropylene/thermoplastic elastomer blends
Mixing polypropylene and an auxiliary agent in a high-speed stirrer according to a certain proportion, adding the mixture into a double-screw extruder, wherein the melting temperature is 210-250 ℃, and drawing the filaments through an oral die, cooling and granulating the filaments through a water tank.
The formulation is shown in table 1.
TABLE 1
[ test of physical Properties ]
After the pellets obtained in examples 1 to 4 and comparative examples 1 to 3 were charged into an injection molding machine and injection-molded (the temperature of each stage of the injection molding machine was 180 ℃, 190 ℃, 210 ℃, 210 ℃, 200 ℃, the holding pressure was 50MPa, the holding time was 60s, and the cooling time was 10s), injection-molded samples were prepared and tested for their properties.
Adding the modified polypropylene slices into a feed inlet of a multilayer extrusion casting machine, quenching the modified polypropylene slices on a cooling roll at 235 ℃, and carrying out traction forming to obtain a casting film with the thickness of 50 mu m, wherein the temperature of the cooling roll is set to be 30 ℃.
The physical property test of the sample is carried out according to the national standard: the flexural modulus was tested according to GB/T9341-2000; the impact strength of the notch of the simply supported beam is tested according to GB/T1043 + 1993; the optical properties were tested according to GB/T2410-80. The test results are shown in tables 2 and 3.
TABLE 2
| Flexural modulus (GPa) | Tensile Strength (MPa) | Impact Strength (kJ/m)2) | |
| Comparative example 1 | 0.64 | 21.2 | 37.4 |
| Example 1 | 0.67 | 21.3 | 47.9 |
| Example 2 | 0.71 | 21.2 | 49.4 |
| Example 3 | 0.43 | 20.6 | 60.8 |
| Example 4 | 0.50 | 21.3 | 62.8 |
| Comparative example 2 | 0.68 | 22.1 | 42.3 |
| Comparative example 3 | 0.56 | 22.6 | 40.8 |
TABLE 3
| Haze (%) | Light transmittance (%) | Coefficient of dynamic friction | |
| Comparative example 1 | 5.6 | 92.4 | 0.26 |
| Example 1 | 3.2 | 92.6 | 0.24 |
| Example 2 | 3.1 | 93.5 | 0.11 |
| Example 3 | 2.1 | 92.5 | 0.16 |
| Example 4 | 2.2 | 92.6 | 0.14 |
| Comparative example 2 | 3.3 | 92.9 | 0.23 |
| Comparative example 3 | 3.2 | 93.5 | 0.17 |
Compared with the comparative example 1, the toughness of the material is increased, the optical performance is obviously improved, and the haze of the casting film is reduced after the maleic anhydride copolymer is added. The cast film friction coefficient was reduced compared to other opening agents (oleamide, silica), indicating improved opening performance. When the SEBS content reaches 40 parts, the modulus is greatly reduced, the opening performance is poorer and poorer, the use value is reduced, and a phase separation structure of polypropylene and SEBS possibly occurs due to the change of the phase structure.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A polypropylene/thermoplastic elastomer blend comprising the following components in parts by weight:
based on 100 parts by weight of the total weight of the polypropylene and the hydrogenated styrene-butadiene-styrene block copolymer,
60-99 parts by mass of polypropylene, preferably 65-99 parts by mass; 1-40 parts by mass, preferably 1-35 parts by mass of hydrogenated styrene-butadiene-styrene block copolymer (SEBS);
0.1-1 part by mass, preferably 0.2-0.7 part by mass of the alpha-methylstyrene-maleic anhydride copolymerized microsphere.
2. The polypropylene/thermoplastic elastomer blend according to claim 1, characterized in that:
the polypropylene/thermoplastic elastomer blend comprises a nucleating agent;
based on 100 parts by weight of the total weight of the polypropylene and the hydrogenated styrene-butadiene-styrene block copolymer,
the amount of the nucleating agent is 0.02-0.5 mass part, preferably 0.03-0.3 mass part.
3. The polypropylene/thermoplastic elastomer blend according to claim 2, characterized in that:
the nucleating agent is selected from
3988、
NXTM8000. At least one of Hyperform HPN-20E, VP101B, VP101T and VP 101E.
4. The polypropylene/thermoplastic elastomer blend according to claim 1, characterized in that:
the polypropylene/thermoplastic elastomer blend comprises an antimicrobial agent;
based on 100 parts by weight of the total weight of the polypropylene and the hydrogenated styrene-butadiene-styrene block copolymer,
the dosage of the antibacterial agent is 0.1-1 part by mass, preferably 0.3-0.8 part by mass.
5. The polypropylene/thermoplastic elastomer blend according to claim 4, characterized in that:
the antibacterial agent is selected from at least one of silver-loaded zirconium phosphate, zinc-loaded zirconium phosphate, silver-loaded sodium zirconium phosphate, zinc-loaded sodium zirconium phosphate, silver-loaded fluorite, zinc-loaded fluorite, silver-loaded activated carbon, zinc-loaded activated carbon, silver-loaded copper phosphate, zinc-loaded copper phosphate, silver-loaded calcium phosphate, zinc-loaded calcium phosphate, silver-loaded silica gel, zinc-loaded silica gel, silver-loaded hydroxyapatite and zinc-loaded hydroxyapatite, or at least one of fully vulcanized powdered rubber compound antibacterial agents.
6. The polypropylene/thermoplastic elastomer blend according to claim 1, characterized in that:
the polypropylene/thermoplastic elastomer blend comprises an antioxidant,
based on 100 parts by weight of the total weight of the polypropylene and the hydrogenated styrene-butadiene-styrene block copolymer,
the using amount of the antioxidant is 0.1-3 parts by mass, and preferably 0.1-1.5 parts by mass.
7. The polypropylene/thermoplastic elastomer blend according to claim 6, characterized in that:
the antioxidant is at least one selected from antioxidant 1010, antioxidant 168, antioxidant 1076, antioxidant 2246, antioxidant CA, antioxidant 626 and antioxidant 636, preferably one or two.
8. The polypropylene/thermoplastic elastomer blend according to any one of claims 1 to 7, wherein:
the melt index of the polypropylene is 2-6 g/10 min; and/or the presence of a gas in the gas,
the polypropylene is selected from at least one of homo-polypropylene, random co-polypropylene or impact co-polypropylene; and/or the presence of a gas in the gas,
the hydrogenated styrene-butadiene-styrene block copolymer has a linear structure; and/or the presence of a gas in the gas,
the alpha-methylstyrene-maleic anhydride copolymer microspheres are alpha-methylstyrene-maleic anhydride copolymer microspheres with uniform particle size and monodispersity; and/or the presence of a gas in the gas,
the monomer molar ratio of the maleic anhydride to the alpha-methylstyrene in the alpha-methylstyrene-maleic anhydride copolymerized microsphere is 4: 1-1: 4.
9. The process for preparing a polypropylene/thermoplastic elastomer blend according to any one of claims 1 to 8, characterized in that it comprises:
the polypropylene/maleic anhydride copolymer composite material is prepared by uniformly mixing the components including polypropylene, hydrogenated styrene-butadiene-styrene block copolymer and alpha-methylstyrene-maleic anhydride copolymer microspheres according to the dosage, and carrying out melt blending.
10. Use of the polypropylene/thermoplastic elastomer blend according to any one of claims 1 to 8 or the blend prepared by the preparation method according to claim 9 in the fields of medical devices, medical products, 3D printing, packaging.
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| CN113388199A (en) * | 2021-06-11 | 2021-09-14 | 高邮市汉升高分子材料有限公司 | Preparation method of medical transparent polypropylene material |
| CN114213863A (en) * | 2021-12-30 | 2022-03-22 | 东莞市港鑫实业有限公司 | High-temperature-resistant toy and preparation method thereof |
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