CN116694011A - Composition for preparing polyethylene, polyethylene material, preparation method and application thereof - Google Patents

Composition for preparing polyethylene, polyethylene material, preparation method and application thereof Download PDF

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Publication number
CN116694011A
CN116694011A CN202310617311.1A CN202310617311A CN116694011A CN 116694011 A CN116694011 A CN 116694011A CN 202310617311 A CN202310617311 A CN 202310617311A CN 116694011 A CN116694011 A CN 116694011A
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Prior art keywords
polyethylene
parts
component
antioxidant
composition
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CN202310617311.1A
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Chinese (zh)
Inventor
贾智源
毛泽誉
陈浩
聂伟
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Huangpu Institute of Materials
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Huangpu Institute of Materials
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Priority to CN202310617311.1A priority Critical patent/CN116694011A/en
Publication of CN116694011A publication Critical patent/CN116694011A/en
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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
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • 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
    • C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
    • C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
    • 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
    • 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
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2351/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • 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
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Abstract

The application relates to a composition for preparing polyethylene, a polyethylene material, a preparation method and application thereof. The composition comprises a component A, a component B and a component C. The component A comprises 70 to 100 parts of polyethylene, 0.1 to 0.5 part of main antioxidant, 0.05 to 0.5 part of initiator and 1 to 10 parts of silane cross-linking agent according to the parts by weight; the component B comprises 70-100 parts of polyethylene, 0.1-0.5 part of main antioxidant and 1-10 parts of catalyst; the component C comprises 0.1 to 0.5 part of main antioxidant, 0.1 to 0.5 part of auxiliary antioxidant, 1 to 10 parts of ultraviolet light shielding agent, 0.5 to 2.5 parts of ultraviolet light absorber, 0.1 to 0.5 part of quencher, 0.5 to 1.5 parts of free radical scavenger and 0.5 to 2 parts of water producing agent. Through reasonable selection and proportion of components, the composition is used for preparing polyethylene materials, and can endow better weather resistance and better impact resistance.

Description

Composition for preparing polyethylene, polyethylene material, preparation method and application thereof
Technical Field
The application relates to the technical field of polyethylene materials, in particular to a composition for preparing polyethylene, a polyethylene material, a preparation method and application thereof.
Background
The aerodynamic performance of the wind power blade is determined by the shape of the wind power blade, is a key factor influencing the generating capacity of the wind turbine generator, and has great influence on the power generation in a low wind speed period. In an actual wind field, the wind power blade can radiate ultraviolet rays, alternate high and low temperatures, salt fog, surface dirt, ice and the like. The erosion factors can cause the aerodynamic profile change of the blade, further the aerodynamic efficiency of the blade is reduced, the machine is seriously stopped even, the generating capacity of the machine set is reduced, and the maintenance cost is very expensive due to the self specificity of wind power equipment, so that any wind field is avoided to the greatest extent, and the service period of 20-25 years brings about an ultrahigh requirement on the protection life. In order to protect the blade, a protective tape technology, a high-performance coating technology, a prefabricated armor technology and the like are applied to the blade manufacturing, but still cannot fully meet the actual requirements of the fan.
The polyethylene material has the characteristics of good wear resistance, small friction coefficient, low surface energy, good dirt resistance and icing resistance, and the like, and is expected to be applied to preparing wind power blades. However, in order to cope with severe conditions and long service life, the weatherability and impact resistance of polyethylene materials have yet to be improved.
Disclosure of Invention
Based on the above, the application provides a composition for preparing polyethylene, which can improve the weather resistance and the impact resistance of a polyethylene material.
In addition, the polyethylene material prepared by the composition for preparing polyethylene, and a preparation method and application thereof are also provided.
In one aspect of the present application, there is provided a composition for preparing polyethylene, comprising: component A, component B and component C;
according to the mass portions of the components,
the component A comprises: 70 to 100 parts of polyethylene, 0.1 to 0.5 part of main antioxidant, 0.05 to 0.5 part of initiator and 1 to 10 parts of silane cross-linking agent;
the component B comprises: 70-100 parts of polyethylene, 0.1-0.5 part of main antioxidant and 1-10 parts of catalyst;
the component C comprises: 0.1 to 0.5 part of main antioxidant, 0.1 to 0.5 part of auxiliary antioxidant, 1 to 10 parts of ultraviolet light shielding agent, 0.5 to 2.5 parts of ultraviolet light absorber, 0.1 to 0.5 part of quencher, 0.5 to 1.5 parts of free radical scavenger and 0.5 to 2 parts of water producing agent;
wherein the primary antioxidant comprises a hindered phenol antioxidant;
the auxiliary antioxidant comprises one or more of thioester antioxidants and phosphite antioxidants;
the ultraviolet light shielding agent comprises one or more of zinc oxide, rutile titanium dioxide and carbon black;
the ultraviolet light absorber comprises benzotriazole ultraviolet light absorber;
the quencher includes one or more of a light stabilizer 1084, a light stabilizer AM-101, and a light stabilizer 2002;
the free radical scavenger comprises one or more of a light stabilizer GW770, a light stabilizer HS944, a light stabilizer HS427, a light stabilizer HS625, a light stabilizer HS362 and a light stabilizer T68;
the water-producing agent comprises an aqueous compound.
In some embodiments, the polyethylene comprises one or more of low density polyethylene, linear low density polyethylene, high density polyethylene, and ultra high molecular weight polyethylene.
In some embodiments, the initiator comprises one or more of dicumyl peroxide and dibenzoyl peroxide.
In some embodiments, the silane crosslinking agent includes one or more of methyltriethoxysilane, ethyltriacetoxysilane, vinyltrimethoxysilane, and vinyltriethoxysilane.
In some of these embodiments, the catalyst comprises one or more of vinyl-acrylic acid, dibutyltin dilaurate, and vinyl-methyl acrylate.
In some embodiments, the composition for producing polyethylene satisfies at least one of the conditions (1) to (4):
(1) The primary antioxidants comprise one or more of antioxidants 264, 330, 1010 and 1076;
(2) The auxiliary antioxidants comprise one or more of antioxidant DSTP, antioxidant DLTP and antioxidant 168;
(3) The ultraviolet light absorber comprises one or more of ultraviolet light absorber UV327, ultraviolet light absorber UV326, ultraviolet light absorber UV329 and ultraviolet light absorber UV 437;
(4) The water producing agent comprises metal salt hydrate; optionally, one molecule of the metal salt hydrate contains 1 to 7 molecules of water; optionally, in the metal salt hydrate, the metal salt comprises one of zinc sulfate, zinc acetate and sodium dihydrogen phosphate.
In a second aspect, the present application provides a method for preparing a polyethylene material, comprising the steps of:
the polyethylene material is prepared by mixing the component A, the component B and the component C of the composition for preparing polyethylene.
In some embodiments, the step of mixing component a, component B, and component C to produce a polyethylene material comprises:
melting and granulating the raw materials of the component A to prepare a material A;
melting and granulating the raw materials of the component B to prepare a material B;
according to the mass ratio (80 to 97 portions): (3-20 parts): (2.8-17.5 parts) mixing the material A, the material B and the component C to prepare a mixture;
and melting the mixture to prepare the polyethylene material.
In some embodiments, the step of melting the blend to produce the polyethylene material comprises:
melting and pressing the mixture, and preparing a composite film;
and (3) crosslinking the composite film to prepare the polyethylene material.
In a third aspect, the application also provides a polyethylene material, obtainable with the composition for the preparation of polyethylene as described above or according to the process for the preparation of a polyethylene material as described above.
In a fourth aspect, the application also provides application of the polyethylene material in the third aspect in preparation of wind power blades and protective equipment.
The composition for preparing the polyethylene provided by the embodiment of the application comprises the component A, the component B and the component C with specific compositions, and can endow the polyethylene material with better weather resistance and better impact resistance through reasonable selection and proportion of the components of the composition.
Detailed Description
The present application will be described more fully hereinafter in order to facilitate an understanding of the present application. This application may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Where the terms "comprising," "having," and "including" are used herein, it is intended to cover a non-exclusive inclusion, unless a specifically defined term is used, such as "consisting of … … only," etc., another component may be added.
In the present disclosure, the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
The words "preferably," "more preferably," "more preferably," and the like, refer to embodiments of the application that may provide certain benefits in some instances. However, other embodiments may be preferred under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the application. That is, in the present application, "preferable", "more preferable", etc. are merely description of embodiments or examples that are more effective, but do not limit the scope of the present application.
In the present application, "further", "still further", "particularly" and the like are used for descriptive purposes to indicate differences in content but should not be construed as limiting the scope of the application.
In the present application, "at least one" means one or more, such as one, two or more. The meaning of "plural" or "several" means at least two, for example, two, three, etc., and the meaning of "multiple" means at least two, for example, two, three, etc., unless specifically defined otherwise. In the description of the present application, the meaning of "several" means at least one, such as one, two, etc., unless specifically defined otherwise.
When a range of values is disclosed in the present application, the range is considered to be continuous and includes the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range description features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to include any and all subranges subsumed therein. And only a few numerical ranges are specifically disclosed herein. However, any lower limit may be combined with any upper limit to form a range not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and any upper limit may be combined with any other upper limit to form a range not explicitly recited. Furthermore, each separately disclosed point or individual value may itself be combined as a lower limit or upper limit with any other point or individual value or with other lower limit or upper limit to form a range not explicitly recited.
All steps of the present application may be performed sequentially or randomly unless otherwise specified. For example, the method comprises steps (a) and (b), meaning that the method may comprise steps (a) and (b) performed sequentially, or may comprise steps (b) and (a) performed sequentially. For example, the method may further comprise step (c), meaning that step (c) may be added to the method in any order, e.g., the method may comprise steps (a), (b) and (c), steps (a), (c) and (b), steps (c), (a) and (b), etc.
Unless mentioned to the contrary, singular terms may include plural and are not to be construed as being one in number.
The temperature parameter in the present application is not particularly limited, and may be a constant temperature treatment or a treatment within a predetermined temperature range. The constant temperature process allows the temperature to fluctuate within the accuracy of the instrument control.
The weights of the relevant components mentioned in the embodiments of the present application may refer not only to the specific contents of the respective components but also to the proportional relationship between the weights of the respective components, and thus, it is within the scope of the disclosure of the embodiments of the present application as long as the contents of the relevant components are scaled up or down according to the embodiments of the present application. Specifically, the weight described in the examples of the present application may be a mass unit known in the chemical industry such as mu g, mg, g, kg.
In the present application, referring to a unit of a data range, if a unit is only carried behind a right end point, the units indicating the left and right end points are the same. For example, 800-850 nm means that the units of the left end point "800" and the right end point "850" are nm (nanometers).
An embodiment of the application provides a composition for preparing polyethylene, which comprises a component A, a component B and a component C.
Wherein, the component A comprises the following components in parts by weight: 70 to 100 parts of polyethylene, 0.1 to 0.5 part of main antioxidant, 0.05 to 0.5 part of initiator and 1 to 10 parts of silane cross-linking agent. The component A contains polyethylene and a silane cross-linking agent, and can generate cross-linking reaction in the preparation process of the polyethylene, so that the mechanical property and the impact resistance of the polyethylene material are improved.
Alternatively, in component a, the polyethylene is present in a mass fraction of 70 parts, 80 parts, 90 parts, 100 parts, or any number thereof. The mass portion of the main antioxidant is 0.1 portion, 0.2 portion, 0.3 portion, 0.4 portion, 0.5 portion or any numerical value of the above. The mass fraction of the initiator is in the range of 0.05 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part or any numerical value of the above. The mass fraction of the silane crosslinking agent is 1 part, 2 parts, 4 parts, 5 parts, 6 parts, 8 parts, 10 parts or any numerical value of the above.
The component B comprises the following components in parts by mass: 70 to 100 parts of polyethylene, 0.1 to 0.5 part of main antioxidant and 1 to 10 parts of catalyst. The component B contains polyethylene and a catalyst, and the catalyst in the component B can catalyze the crosslinking reaction of the silane crosslinking agent. In the preparation process, the occurrence of the crosslinking reaction can be reasonably controlled by controlling the mixing process of the component A and the component B.
Alternatively, in component B, the polyethylene is present in a mass fraction of 70 parts, 80 parts, 90 parts, 100 parts, or any number thereof. The mass portion of the main antioxidant is 0.1 portion, 0.2 portion, 0.3 portion, 0.4 portion, 0.5 portion or any numerical value of the above. The mass fraction of the catalyst is 1 part, 2 parts, 4 parts, 5 parts, 6 parts, 8 parts, 10 parts or any numerical value of the above.
The component C comprises the following components in parts by mass: 0.1 to 0.5 part of main antioxidant, 0.1 to 0.5 part of auxiliary antioxidant, 1 to 10 parts of ultraviolet light shielding agent, 0.5 to 2.5 parts of ultraviolet light absorber, 0.1 to 0.5 part of quencher, 0.5 to 1.5 parts of free radical scavenger and 0.5 to 2 parts of water producing agent. The component C comprises a plurality of antioxidants and ultraviolet-resistant additives, and can improve the oxidation resistance of the polyethylene material through reasonable combination proportion, so that the polyethylene material is not easy to age and has better weather resistance.
Optionally, in component C, the mass fraction of the primary antioxidant is in the range of 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, or any number above. The auxiliary antioxidant is 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part or any numerical range of the above parts by mass. The ultraviolet light shielding agent is 1 part, 2 parts, 4 parts, 5 parts, 6 parts, 8 parts, 10 parts or any numerical range of the above. The ultraviolet light absorber is in the range of 0.5 part, 1 part, 1.5 parts, 2 parts, 2.5 parts or any numerical value of the above parts by mass. The mass fraction of the quencher is in the range of 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part or any of the above numerical compositions. The weight portion of the free radical scavenger is 0.5 portion, 0.6 portion, 0.8 portion, 0.9 portion, 1 portion, 1.2 portion, 1.4 portion, 1.5 portion or any numerical value of the above. The water producing agent is 0.5 part, 0.6 part, 0.8 part, 1 part, 1.2 parts, 1.5 parts, 1.8 parts, 2 parts or any numerical value of the above ranges.
Wherein the primary antioxidant comprises hindered phenol antioxidants. In some of these embodiments, the primary antioxidants include one or more of antioxidants 264, 330, 1010, and 1076.
The auxiliary antioxidant comprises one or more of thio-ester antioxidants and phosphite antioxidants. In some of these embodiments, the secondary antioxidants include one or more of antioxidant DSTP, antioxidant DLTP, and antioxidant 168.
The ultraviolet light shielding agent comprises one or more of zinc oxide, rutile type titanium dioxide and carbon black. In some of these embodiments, the zinc oxide has a particle size of 10nm to 20nm; further 15nm. In some of these embodiments, the particle size of the rutile titanium dioxide is from 65nm to 75nm; further 70nm. In some of these embodiments, the carbon black has a particle size of 65nm to 75nm; further 70nm. By controlling the particle size of the ultraviolet light shielding agent, the optimal weather-proof effect can be achieved.
The ultraviolet light absorber comprises benzotriazole ultraviolet light absorber. In some of these embodiments, the ultraviolet light absorber includes one or more of ultraviolet light absorber UV327, ultraviolet light absorber UV326, ultraviolet light absorber UV329, and ultraviolet light absorber UV 437.
The quencher includes one or more of light stabilizer 1084, light stabilizer AM-101, and light stabilizer 2002.
The free radical scavenger comprises one or more of light stabilizer GW770, light stabilizer HS944, light stabilizer HS427, light stabilizer HS625, light stabilizer HS362, and light stabilizer T68.
The water producing agent has the function of providing water for the crosslinking reaction of the silane crosslinking agent. The water-producing agent comprises an aqueous compound. In some of these embodiments, the water-generating agent comprises a metal salt hydrate. In some embodiments, one molecule of metal salt hydrate contains 1 to 7 molecules of water. Optionally, in the metal salt hydrate, the metal salt includes one of zinc sulfate, zinc acetate, and sodium dihydrogen phosphate.
The composition for preparing the polyethylene is used for preparing the polyethylene material through reasonable selection and proportion of the composition components, and can endow the polyethylene material with better weather resistance and better impact resistance.
In some of these embodiments, the polyethylene comprises one or more of low density polyethylene, linear low density polyethylene, high density polyethylene, and ultra high molecular weight polyethylene.
Low density polyethylene, also known as high pressure-low density polyethylene, HP-LDPE (abbreviated as LDPE), is the lightest species in polyethylene resins. Specifically, the density of LDPE is 0.91g/cm 3 ～0.93g/cm 3 。
Linear Low Density Polyethylene (LLDPE) is a molecular structure in which ethylene is copolymerized with a small amount of alpha-olefin to form a chain on the main chain of the linear ethylene with very short comonomer branches. In addition to having the properties of a typical polyolefin resin, LLDPE has tensile strength, tear strength and environmental stress resistanceThe cracking resistance, the low temperature resistance, the heat resistance and the puncture resistance are particularly excellent. Specifically, LLDPE has a density of 0.91g/cm 3 ～0.925g/cm 3 Between them.
High Density Polyethylene (HDPE) is an opaque white waxy material that is soft and ductile, but slightly harder than LDPE, and also slightly stretchable, nontoxic, and odorless. Specifically, the HDPE has a density of 0.941g/cm 3 ～0.960g/cm 3 。
Ultra high molecular weight polyethylene, english name ultra-high molecular weight polyethylene (abbreviated as UHMWPE), is unbranched linear polyethylene with a molecular weight of 150 ten thousand or more. UHMWPE is a thermoplastic engineering plastic of linear structure with excellent overall properties. Specifically, the density of UHMWPE is 0.920g/cm 3 ～0.964g/cm 3 。
In some of these embodiments, the initiator comprises one or more of dicumyl peroxide and dibenzoyl peroxide.
In some of these embodiments, the silane cross-linking agent includes one or more of methyltriethoxysilane, ethyltriacetoxysilane, vinyltrimethoxysilane, and vinyltriethoxysilane.
In some of these embodiments, the catalyst comprises one or more of vinyl-acrylic acid, dibutyltin dilaurate, and vinyl-methyl acrylate.
In some of these embodiments, component a comprises, in parts by weight: 70 to 100 parts of polyethylene, 0.2 to 0.3 part of main antioxidant, 0.1 to 0.2 part of initiator and 3 to 5 parts of silane cross-linking agent. The component B comprises: 70 to 100 parts of polyethylene, 0.2 to 0.3 part of main antioxidant and 4 to 8 parts of catalyst. The component C comprises: 0.2 to 0.3 part of main antioxidant, 0.1 to 0.2 part of auxiliary antioxidant, 5 to 7.5 parts of ultraviolet light shielding agent, 0.5 to 1 part of ultraviolet light absorber, 0.2 to 0.3 part of quencher, 0.8 to 1.2 parts of free radical scavenger and 0.8 to 1.5 parts of water producing agent.
In some of these embodiments, the polyethylene composition comprises, in parts by weight:
component A: 70 to 100 parts of ultra-high molecular weight polyethylene, 0.2 to 0.3 part of main antioxidant 1010, 0.1 to 0.2 part of dicumyl peroxide and 3 to 5 parts of vinyl triethoxysilane;
component B: 70 to 100 parts of ultra-high molecular weight polyethylene, 0.2 to 0.3 part of primary antioxidant 1010 and 4 to 8 parts of dibutyl tin dilaurate.
Component C: 0.2 to 0.3 part of main antioxidant 1010, 0.1 to 0.2 part of auxiliary antioxidant 168, 2.5 to 5 parts of zinc oxide, 2.5 to 5 parts of titanium dioxide, 0.5 to 1 part of UV326, 0.2 to 0.3 part of photostabilizer 1084.2 to 1.2 parts of HS625 and 0.8 to 1.5 parts of zinc acetate dihydrate.
In another embodiment of the application, a polyethylene material is provided, and the polyethylene material is prepared from the composition for preparing polyethylene.
The polyethylene material prepared by the composition for preparing the polyethylene has better weather resistance and impact resistance.
In another embodiment of the present application, there is also provided a method for preparing a polyethylene material, comprising the steps of S100 to S400:
step S100: and (3) melting and granulating the raw materials of the component A to prepare a material A.
In some of these embodiments, step S100 is performed by a twin screw extruder. In the melting process, the raw materials of the component A undergo a melt grafting reaction, and the reaction product is subjected to air cooling, granulating and drying to obtain a silane graft, namely a material A.
In some embodiments, the temperature of each temperature zone of the twin-screw extruder 1-7 in step S100 is 140-190 ℃ and the screw speed is 100-300 r/min.
Step S200: and (3) melting and granulating the raw materials of the component B to prepare a material B.
In some of these embodiments, step S100 is performed by a twin screw extruder. In the melting process, the raw materials of the component B are melted and blended, and the material B is obtained through air cooling, granulating and drying.
In some embodiments, the temperature of each temperature zone of the twin-screw extruder 1-7 in step S200 is 130-230 ℃ and the screw speed is 150-300 r/min.
Step S300: according to the mass ratio (80 to 97 portions): (3-20 parts): (2.8-17.5 parts) mixing the material A, the material B and the component C to prepare a mixture.
Step S400: and melting the mixture to prepare the polyethylene material.
In some of these embodiments, step S400 includes:
step S410: and melting the mixture, and carrying out pressure extension to prepare the composite film.
In some of these embodiments, step S410 is melted by a twin screw extruder. And (5) carrying out pressure-extension film forming on the melted mixture to obtain the composite film.
Step S420: and (3) crosslinking the composite film to prepare the polyethylene material.
In some of these embodiments, the crosslinking treatment is carried out at a temperature of 20℃to 25℃and a humidity RH of 55% to 85%. The time of the crosslinking treatment is not less than 20 days.
In some of these embodiments, the polyethylene material produced in step S420 has a thickness of 0.5mm to 3mm. Further, the thickness of the polyethylene material is 0.5 mm-2 mm.
In a fourth aspect, the application also provides application of the polyethylene material in preparation of wind power blades and protective equipment.
In order to make the objects, technical solutions and advantages of the present application more concise, the present application will be described in the following specific examples, but the present application is by no means limited to these examples. The following examples are only preferred embodiments of the present application, which can be used to describe the present application, and should not be construed as limiting the scope of the application. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principle of the present application should be included in the protection scope of the present application.
In order to better illustrate the present application, the following description of the present application will be given with reference to examples. The following are specific examples.
Example 1
The embodiment provides a composition for preparing polyethylene, which comprises a component A, a component B and a component C. The component A, B, C comprises the following components in parts by mass:
component A: 100 parts of ultra-high molecular weight polyethylene, 0.2 part of antioxidant 1010, 0.1 part of dicumyl peroxide and 3 parts of vinyl triethoxysilane.
Component B: 100 parts of ultra-high molecular weight polyethylene, 0.2 part of antioxidant 1010 and 8 parts of dibutyl tin dilaurate.
Component C: 0.2 part of primary antioxidant 1010, 0.1 part of secondary antioxidant 168, 2.5 parts of zinc oxide, 5 parts of titanium dioxide, 0.5 part of UV326, 0.2 part of photostabilizer 1084, 625 parts of HS and 1 part of zinc acetate dihydrate.
Wherein the ultra-high molecular weight polyethylene has a molecular weight of 370 ten thousand. The particle size of the zinc oxide is 15nm, the titanium dioxide model is rutile type, and the particle size is 70nm.
The preparation method of the polyethylene material of the embodiment comprises the following steps:
(1) The preparation method comprises the steps of mixing and stirring ultra-high molecular weight polyethylene, an antioxidant 1010, dicumyl peroxide and vinyl triethoxysilane uniformly according to the proportion in a formula of the component A, performing melt grafting reaction in a double-screw extruder, and performing air cooling, granulating and drying on an obtained grafting product to obtain a silane graft, namely a material A for short.
(2) Uniformly mixing ultrahigh molecular weight polyethylene, an antioxidant 1010 and dibutyltin dilaurate according to the proportion in the formula of the component B, then carrying out melt blending in a double-screw extruder, and carrying out air cooling, granulating, drying and obtaining a catalyst master batch, namely a material B for short.
(3) And (3) carrying out melt blending on the raw materials of the formula of the component C, 95 parts of the material A and 5 parts of the material B in a double-screw extruder, and then directly calendering to form a film to obtain the polyethylene composite film.
(4) And (3) standing the polyethylene composite film in an air conditioning room (23+/-2 ℃ and RH of 70+/-15%) for 20 days to obtain a crosslinked polyethylene composite film finished product.
Comparative example 1
The composition for preparing polyethylene of the comparative example comprises the following components in parts by mass: 100 parts of ultra-high molecular weight polyethylene, 0.2 part of antioxidant 1010 and 0.1 part of auxiliary antioxidant 168. Wherein the molecular weight of the ultra-high molecular weight polyethylene is 370 ten thousand.
The preparation method of the polyethylene material of the comparative example comprises the following steps: the ultra-high molecular weight polyethylene, the primary antioxidant 1010 and the secondary antioxidant 168 are mixed and stirred uniformly according to the composition proportion, and then are melted and blended in a single-screw calendering machine to be directly calendered and formed into a film, thus obtaining the ultra-high molecular weight polyethylene film.
Comparative example 2
The composition for preparing polyethylene of this comparative example comprises component A, component B and component C. The component A, B, C comprises the following components in parts by mass:
component A: 100 parts of ultra-high molecular weight polyethylene, 0.2 part of antioxidant 1010, 0.1 part of dicumyl peroxide and 3 parts of vinyl triethoxysilane.
Component B: 100 parts of ultra-high molecular weight polyethylene, 0.2 part of antioxidant 1010 and 8 parts of dibutyl tin dilaurate.
Component C: 0.2 part of primary antioxidant 1010 and 0.1 part of secondary antioxidant 168.
The preparation method of the polyethylene material of this comparative example was the same as in example 1.
Comparative example 3
The composition for preparing polyethylene of the comparative example comprises the following components in parts by mass: 100 parts of ultra-high molecular weight polyethylene, 0.2 part of antioxidant 1010, 0.1 part of auxiliary antioxidant 168, 2.5 parts of zinc oxide, 5 parts of titanium dioxide, 0.5 part of UV326, 0.2 part of light stabilizer 1084 and 625 parts of HS 625.
Wherein the ultra-high molecular weight polyethylene has a molecular weight of 370 ten thousand. The particle size of zinc oxide is 15nm, the titanium dioxide type is rutile type, and the particle size is 70nm.
The preparation method of the polyethylene material of the comparative example comprises the following steps: the ultra-high molecular weight polyethylene, the antioxidant 1010, the auxiliary antioxidant 168, the zinc oxide, the titanium dioxide, the UV326, the light stabilizer 1084 and the HS625 are uniformly mixed according to the proportion in the component formula, and then are directly calendered into a film after being melted and mixed in a double-screw extruder, so as to obtain the polyethylene composite film.
Comparative example 4
The embodiment provides a composition for preparing polyethylene, which comprises a component A, a component B and a component C. The component A, B, C comprises the following components in parts by mass:
component A: 100 parts of ultra-high molecular weight polyethylene, 0.2 part of antioxidant 1010, 0.3 part of dicumyl peroxide and 4.5 parts of vinyl triethoxysilane.
Component B: 100 parts of ultra-high molecular weight polyethylene, 0.2 part of antioxidant 1010 and 4 parts of dibutyltin dilaurate.
Component C: 0.2 part of primary antioxidant 1010, 0.1 part of secondary antioxidant 168, 5 parts of zinc oxide, 1 part of photostabilizer 1084, 1.5 parts of HS427 and 1.5 parts of zinc acetate dihydrate.
Wherein the ultra-high molecular weight polyethylene has a molecular weight of 370 ten thousand. The particle size of the zinc oxide was 15nm.
The preparation method of the polyethylene material of this comparative example is substantially the same as in example 1.
Performance testing
Test of tensile Strength and elongation at Break:
tensile strength testing was performed according to the general plastic tensile test standard (DIN EN ISO 527-1), test environmental conditions: the temperature was (23.+ -. 2) C, and the humidity was (50.+ -. 10)% R.H.
Uv aging test:
ultraviolet aging test is carried out according to ISO 16474-3-2013 ultraviolet aging universal standard (ultraviolet lamp tube is UVB313, circulation condition is that ultraviolet irradiation is carried out for 4 hours, irradiation intensity is 0.71+/-0.02W/m < 2 >, blackboard temperature is 60+/-3 ℃ C.; condensation is carried out for 4 hours, ultraviolet lamp is closed, and blackboard temperature is 50+/-3 ℃ C.).
Impact strength test:
the impact resistance of the bars was tested according to GB/T1843-2008 determination of impact Strength of Plastic cantilever. Testing environmental conditions: the temperature was 23℃and the humidity was 50% R.H.
TABLE 1
As can be seen from the data related to Table 1, the polyethylene material of the embodiment 1 is prepared by adopting the composition for preparing polyethylene provided by the application, and the polyethylene material of the embodiment 1 is subjected to crosslinking treatment and contains specific auxiliary agents through reasonable proportion of components, so that the polyethylene material has better weather resistance and higher impact resistance.
The polyethylene material of comparative example 1 does not contain a silane crosslinking agent and a specific auxiliary agent, and the polyethylene material of comparative example 1 is inferior in weather resistance and impact resistance without undergoing crosslinking treatment.
The polyethylene material of comparative example 2 contains a silane crosslinking agent and does not contain a specific auxiliary agent, and the polyethylene material is subjected to crosslinking treatment, but the material has poor weather resistance and impact resistance.
The polyethylene material of comparative example 3 does not contain a silane cross-linking agent or a water-producing agent, and has weather resistance but poor impact resistance.
The polyethylene material of comparative example 4 does not contain an ultraviolet light absorber in the auxiliary agent, and the amount of the quencher light stabilizer 1084 exceeds 0.5 part, and the polyethylene material is inferior in weather resistance and impact resistance, as compared with example 1.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which facilitate a specific and detailed understanding of the technical solutions of the present application, but are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. It should be understood that, based on the technical solutions provided by the present application, those skilled in the art obtain technical solutions through logical analysis, reasoning or limited experiments, all of which are within the scope of protection of the appended claims. The scope of the patent of the application should therefore be determined with reference to the appended claims, which are to be construed as in accordance with the doctrines of claim interpretation.

Claims (11)

1. A composition for producing polyethylene, comprising: component A, component B and component C;
according to the mass portions of the components,
the component A comprises: 70 to 100 parts of polyethylene, 0.1 to 0.5 part of main antioxidant, 0.05 to 0.5 part of initiator and 1 to 10 parts of silane cross-linking agent;
the component B comprises: 70-100 parts of polyethylene, 0.1-0.5 part of main antioxidant and 1-10 parts of catalyst;
the component C comprises: 0.1 to 0.5 part of main antioxidant, 0.1 to 0.5 part of auxiliary antioxidant, 1 to 10 parts of ultraviolet light shielding agent, 0.5 to 2.5 parts of ultraviolet light absorber, 0.1 to 0.5 part of quencher, 0.5 to 1.5 parts of free radical scavenger and 0.5 to 2 parts of water producing agent;
wherein the primary antioxidant comprises a hindered phenol antioxidant;
the auxiliary antioxidant comprises one or more of thioester antioxidants and phosphite antioxidants;
the ultraviolet light shielding agent comprises one or more of zinc oxide, rutile titanium dioxide and carbon black;
the ultraviolet light absorber comprises benzotriazole ultraviolet light absorber;
the quencher includes one or more of a light stabilizer 1084, a light stabilizer AM-101, and a light stabilizer 2002;
the free radical scavenger comprises one or more of a light stabilizer GW770, a light stabilizer HS944, a light stabilizer HS427, a light stabilizer HS625, a light stabilizer HS362 and a light stabilizer T68;
the water-producing agent comprises an aqueous compound.
2. The composition for preparing polyethylene according to claim 1, wherein the polyethylene comprises one or more of low density polyethylene, linear low density polyethylene, high density polyethylene and ultra high molecular weight polyethylene.
3. The composition for producing polyethylene according to claim 1, wherein the initiator comprises one or more of dicumyl peroxide and dibenzoyl peroxide.
4. The composition for producing polyethylene according to claim 1, wherein the silane crosslinking agent comprises one or more of methyltriethoxysilane, ethyltriacetoxysilane, vinyltrimethoxysilane, and vinyltriethoxysilane.
5. The composition for preparing polyethylene according to claim 1, wherein the catalyst comprises one or more of vinyl-acrylic acid, dibutyltin dilaurate and vinyl-methyl acrylate.
6. The composition for producing polyethylene according to any one of claims 1 to 5, wherein the composition for producing polyethylene satisfies at least one of the conditions (1) to (4):
(1) The primary antioxidants comprise one or more of antioxidants 264, 330, 1010 and 1076;
(2) The auxiliary antioxidants comprise one or more of antioxidant DSTP, antioxidant DLTP and antioxidant 168;
(3) The ultraviolet light absorber comprises one or more of ultraviolet light absorber UV327, ultraviolet light absorber UV326, ultraviolet light absorber UV329 and ultraviolet light absorber UV 437;
(4) The water producing agent comprises metal salt hydrate; optionally, one molecule of the metal salt hydrate contains 1 to 7 molecules of water; optionally, in the metal salt hydrate, the metal salt comprises one of zinc sulfate, zinc acetate and sodium dihydrogen phosphate.
7. A method for preparing a polyethylene material, comprising the steps of:
a polyethylene material prepared by mixing the component A, the component B and the component C of the composition for preparing polyethylene according to any one of claims 1 to 6.
8. The method of producing a polyethylene material according to claim 7, wherein the step of mixing the component a, the component B and the component C to produce a polyethylene material comprises:
melting and granulating the raw materials of the component A to prepare a material A;
melting and granulating the raw materials of the component B to prepare a material B;
according to the mass ratio (80 to 97 portions): (3-20 parts): (2.8-17.5 parts) mixing the material A, the material B and the component C to prepare a mixture;
and melting the mixture to prepare the polyethylene material.
9. The method of producing a polyethylene material according to claim 8, wherein the step of melting the mixture to produce a polyethylene material comprises:
melting and pressing the mixture, and preparing a composite film;
and (3) crosslinking the composite film to prepare the polyethylene material.
10. A polyethylene material, characterized by being produced using the composition for producing polyethylene according to any one of claims 1 to 6 or the process for producing a polyethylene material according to any one of claims 7 to 9.
11. The application of the polyethylene material in preparing wind power blades and protective equipment according to claim 10.
CN202310617311.1A 2023-05-29 2023-05-29 Composition for preparing polyethylene, polyethylene material, preparation method and application thereof Pending CN116694011A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117567810A (en) * 2024-01-16 2024-02-20 新疆独山子石油化工有限公司 Multifunctional metallocene polyethylene and its compound additive and preparation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117567810A (en) * 2024-01-16 2024-02-20 新疆独山子石油化工有限公司 Multifunctional metallocene polyethylene and its compound additive and preparation method

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