CN116178839A - Wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe and preparation method thereof - Google Patents
Wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe and preparation method thereof Download PDFInfo
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- CN116178839A CN116178839A CN202211684759.7A CN202211684759A CN116178839A CN 116178839 A CN116178839 A CN 116178839A CN 202211684759 A CN202211684759 A CN 202211684759A CN 116178839 A CN116178839 A CN 116178839A
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- -1 polypropylene Polymers 0.000 title claims abstract description 279
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 207
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 207
- 229920003023 plastic Polymers 0.000 title claims abstract description 74
- 239000004033 plastic Substances 0.000 title claims abstract description 74
- 239000002131 composite material Substances 0.000 title claims abstract description 65
- 238000005260 corrosion Methods 0.000 title claims abstract description 37
- 230000007797 corrosion Effects 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 57
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 57
- 239000011347 resin Substances 0.000 claims abstract description 57
- 229920005989 resin Polymers 0.000 claims abstract description 57
- 239000002994 raw material Substances 0.000 claims abstract description 32
- 238000001125 extrusion Methods 0.000 claims description 25
- 239000004698 Polyethylene Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- 229920000573 polyethylene Polymers 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 10
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000009832 plasma treatment Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 24
- 239000002245 particle Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 15
- 238000005299 abrasion Methods 0.000 description 8
- 239000002667 nucleating agent Substances 0.000 description 7
- 238000005336 cracking Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000005469 granulation Methods 0.000 description 5
- 230000003179 granulation Effects 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 239000003963 antioxidant agent Substances 0.000 description 4
- 230000003078 antioxidant effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010559 graft polymerization reaction Methods 0.000 description 4
- 239000012943 hotmelt Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002318 adhesion promoter Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical group CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 description 1
- LWDQPPLPHGXYLG-UHFFFAOYSA-N 1-(2,3,4-trimethoxyphenyl)propan-2-amine Chemical group COC1=CC=C(CC(C)N)C(OC)=C1OC LWDQPPLPHGXYLG-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 150000008301 phosphite esters Chemical group 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- 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
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
- F16L58/1036—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe the coating being a preformed pipe
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
-
- 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
- B32B2597/00—Tubular articles, e.g. hoses, pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The application relates to the field of pipes, and particularly discloses a wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe and a preparation method thereof. The wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe comprises an outer pipe layer, a steel pipe layer and an inner pipe layer, wherein the steel pipe layer is arranged between the outer pipe layer and the inner pipe layer, and the outer pipe layer is prepared from the following raw materials in parts by weight: 80-90 parts of polypropylene resin, 10-20 parts of polytetrafluoroethylene and 1-3 parts of polytetrafluoroethylene; the inner pipe layer is prepared from the following raw materials in parts by weight: 70-80 parts of polypropylene resin and 10-20 parts of AS resin. The wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe has excellent wear resistance, impact resistance and corrosion resistance.
Description
Technical Field
The application relates to the field of pipes, in particular to a wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe and a preparation method thereof.
Background
The steel-plastic composite pipe is a new composite pipe, which is made by using seamless light pipe and welded steel pipe as basic pipe and coating special paint on the inner wall, and through a series of processes, the rigidity and strength of the traditional metal pipe are kept far beyond those of plastic pipe and aluminum-plastic pipe, and at the same time, the steel-plastic composite pipe is light in weight, mature in installation process and good in weather resistance, and is widely used in various fields of petroleum, natural gas, drain pipe and the like.
However, in actual use, the steel-plastic composite pipe is easy to corrode under the acid-base salt environment due to long-term transportation of industrial liquid, and the outer wall of the steel-plastic composite pipe is easy to wear due to external impact, so that the service life of the pipe is short, frequent replacement is required, and resource waste is caused.
Disclosure of Invention
In order to prolong the service life of the steel-plastic composite pipe, the application provides a wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe and a preparation method thereof.
In a first aspect, the application provides a wear-resistant corrosion-resistant polypropylene steel plastic composite pipe, which adopts the following technical scheme:
the utility model provides a wear-resisting corrosion-resistant polypropylene steel plastic composite pipe, includes outer tube layer, steel tube layer and interior tube layer, the steel tube layer sets up between outer tube layer and interior tube layer, outer tube layer is made by the raw materials including following parts by weight: 80-90 parts of polypropylene resin, 10-20 parts of polytetrafluoroethylene and 1-3 parts of glycidyl methacrylate; the inner pipe layer is prepared from the following raw materials in parts by weight: 70-80 parts of polypropylene resin and 10-20 parts of AS resin.
By adopting the technical scheme, the steel-plastic composite pipe prepared from the polypropylene resin has excellent corrosion resistance, ageing resistance and impact resistance, and the friction factor of polypropylene can be reduced by adding polytetrafluoroethylene into the polypropylene outer pipe, so that the wear resistance of the polypropylene pipe is improved. When polytetrafluoroethylene is blended with polypropylene, a film can be formed on the surface of the polypropylene through coulomb force and Van der Waals force, so that the polypropylene is subjected to film forming protection, the phenomena of scratching and abrasion of the polypropylene film are reduced, and the service life of the polypropylene pipe is prolonged.
Meanwhile, oxygen-containing free radicals generated after the polytetrafluoroethylene is treated can be subjected to graft polymerization with alkene-containing double bonds of glycidyl methacrylate, epoxy groups are introduced into the surface of the polytetrafluoroethylene, so that the adhesiveness of the polytetrafluoroethylene is improved, the adhesion between the polytetrafluoroethylene and polypropylene is promoted, the binding force of each molecule of the polypropylene pipe is improved, the binding force of the polypropylene pipe and a steel pipe is also enhanced, and the phenomena of cracking and falling of the pipe are reduced.
The AS resin is combined with the polypropylene resin, so that the corrosion resistance and weather resistance of the polypropylene pipe are improved, meanwhile, the AS resin and the polypropylene have a certain entanglement effect, and the crystal size of the polypropylene is thinned, so that the toughness and impact strength of the polypropylene pipe are improved, the cracking phenomenon of the polypropylene pipe is reduced, and the service life of the polypropylene pipe is further prolonged.
Preferably, the outer tube layer raw material further comprises 1-5 parts of polyethylene wax.
By adopting the technical scheme, the polyethylene wax is added into the polypropylene, so that the friction coefficient of the polypropylene can be reduced, the wear resistance of the polypropylene pipe is improved, and the phenomena of scratch and abrasion of the polypropylene pipe are reduced. The polyethylene wax can also improve the dispersibility of each molecule in a polypropylene system, has good compatibility with polypropylene, and can absorb part of impact energy due to the breakage of polyethylene wax molecular chains when impacted, thereby having a certain promotion effect on the impact resistance of polypropylene pipes.
Preferably, the inner pipe layer raw material further comprises 1-5 parts of tackifier.
By adopting the technical scheme, the adhesion promoter can enhance the binding force between the polypropylene resin and the AS resin, can promote the polypropylene pipe to be better adhered to the steel pipe, improves the binding force between the polypropylene pipe and the steel pipe, further improves the service life of the polypropylene steel-plastic composite pipe, and reduces the phenomena of falling off and corrosion of the polypropylene pipe and the steel pipe.
Preferably, the tackifier is a styrene-butadiene-styrene block copolymer.
By adopting the technical scheme, the styrene-butadiene-styrene block copolymer is added into the polypropylene system, so that the binding force among molecules in the polypropylene system is enhanced, and the corrosion resistance of the polypropylene pipe is improved. Meanwhile, the styrene-butadiene-styrene segmented copolymer can also improve the crystal structure of polypropylene and control the spherical crystal size of polypropylene, so that the toughness of the polypropylene pipe is improved, part of impact energy can be absorbed, the phenomena of embrittlement and cracking of the polypropylene pipe are reduced, and the service life of the polypropylene composite pipe is prolonged.
Preferably, the outer tube layer is made from the following raw materials in parts by weight: 82-87 parts of polypropylene resin, 13-17 parts of polytetrafluoroethylene and 1.5-2.5 parts of glycidyl methacrylate; the inner pipe layer is prepared from the following raw materials in parts by weight: 73-78 parts of polypropylene resin and 13-17 parts of AS resin.
Through adopting above-mentioned technical scheme, through the suitable use amount of control polypropylene tubular product raw materials for each component of polypropylene tubular product can better combination, improves polypropylene tubular product wearability and corrosion resistance, improves polypropylene tubular product's impact resistance and toughness simultaneously.
In a second aspect, the application provides a preparation method of a wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe, which adopts the following technical scheme:
a preparation method of a wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe comprises the following steps:
s1: mixing polypropylene resin and AS resin, putting the mixture into an extruder to prepare a polypropylene inner pipe layer, and then carrying out hot melting compounding on the polypropylene inner pipe and a steel pipe;
s2: pre-treating polytetrafluoroethylene by plasma, mixing the polytetrafluoroethylene with glycidyl methacrylate, and heating to react to obtain glycidyl methacrylate modified polytetrafluoroethylene; and mixing polypropylene resin and glycidyl methacrylate modified polytetrafluoroethylene, putting into an extruder for melt extrusion, coating one side of the steel pipe layer far away from the polypropylene inner pipe, cooling and shaping to obtain a polypropylene outer pipe layer, and finally obtaining the polypropylene steel-plastic composite pipe.
Preferably, in the step S2, the extrusion temperature of the extruder is 330-340 ℃.
By adopting the technical scheme, the prepared polypropylene steel-plastic composite pipe has excellent rigidity and strength, and polypropylene pipes with different performances are compounded on two sides of the steel pipe, so that the prepared polypropylene steel-plastic composite pipe has excellent corrosion resistance, wear resistance and toughness. The polytetrafluoroethylene is subjected to plasma treatment in advance, a large amount of free radicals can be generated on the surface of the polytetrafluoroethylene to form peroxide, and the peroxide can be subjected to graft polymerization with olefinic double bonds of glycidyl methacrylate during heating, so that the adhesion of the polytetrafluoroethylene is improved, the adhesion of the polytetrafluoroethylene and polypropylene resin is improved, and better combination of a polypropylene pipe and a steel pipe is further promoted.
Preferably, the temperature of the heating reaction of the polytetrafluoroethylene and the glycidyl methacrylate is 70-80 ℃.
By adopting the technical scheme, proper temperature is controlled, and better grafting reaction of polytetrafluoroethylene and glycidyl methacrylate is promoted.
In summary, the present application has the following beneficial effects:
1. as polytetrafluoroethylene and AS resin are added into the polypropylene system, the wear resistance and corrosion resistance of the polypropylene pipe are improved through combination with polypropylene. The polytetrafluoroethylene protects the polypropylene pipe by certain film forming, reduces the phenomena of scratch and abrasion of the polypropylene film, and prolongs the service life of the polypropylene pipe. The entanglement of AS resin and polypropylene molecular chain can improve the structure of polypropylene crystallization, thereby improving the toughness of polypropylene, reducing the phenomena of brittleness and cracking of polypropylene and further prolonging the service life of polypropylene pipes.
2. According to the method, the glycidyl methacrylate and the polytetrafluoroethylene are subjected to graft polymerization, epoxy groups are introduced into the surface of the polytetrafluoroethylene, so that the adhesiveness of the polytetrafluoroethylene is improved, the adhesive force between the polytetrafluoroethylene and the polypropylene resin is enhanced, and the polypropylene pipe and the steel pipe are better combined.
3. According to the steel-plastic pipe, the two sides of the steel pipe are both compounded with the polypropylene pipe, so that the excellent rigidity and strength of the steel-plastic pipe are maintained, and meanwhile, the steel-plastic pipe also has excellent corrosion resistance, wear resistance and impact resistance.
Detailed Description
The present application is described in further detail below with reference to examples.
The styrene-butadiene-styrene block copolymer was SBS1301 of Beijing Yanshan division, china petrochemical Co., ltd.
The polyethylene wax has a molecular weight of 3000.
The molecular weight of polytetrafluoroethylene was 40000.
The molecular weight of the polypropylene resin was 90000.
AS resin was selected from Daqing petrochemical company (GF-5110), china Petroleum and Natural gas Co., ltd.
The nucleating agent is TMA-3.
The antioxidant is selected from phosphite esters.
The solvent is acetone.
Examples
Example 1
The polypropylene steel-plastic composite pipe comprises an outer pipe layer, a steel pipe layer and an inner pipe layer, wherein the steel pipe layer is compounded between the outer pipe layer and the inner pipe layer, and the outer pipe layer is prepared from the following raw materials in parts by weight: 85kg of polypropylene resin for an outer tube layer, 15kg of polytetrafluoroethylene, 2kg of glycidyl methacrylate, 2kg of nucleating agent for the outer tube layer and 2kg of antioxidant; the inner pipe layer is prepared from the following raw materials in parts by weight: 75kg of polypropylene resin for the inner tube layer, 15kg of AS resin and 2kg of nucleating agent for the inner tube layer.
The preparation method of the polypropylene steel-plastic composite pipe comprises the following steps:
s1: mixing polypropylene resin for an inner pipe layer, AS resin and a nucleating agent for the inner pipe layer, putting the mixture into a double-screw extruder for extrusion granulation to obtain mixed particles, putting the mixed particles into a plastic pipe extruder for melt extrusion, cooling and shaping at the extrusion temperature of 200 ℃, obtaining a polypropylene inner pipe, inserting the polypropylene inner pipe into a steel pipe, then performing hot melt adhesion on the polypropylene inner pipe and the steel pipe, forming a polypropylene inner pipe layer on the inner side of the steel pipe, wherein the thickness of the polypropylene inner pipe layer is 2 mm+/-0.1 mm, and obtaining a polypropylene composite steel plastic pipe semi-finished product;
s2, carrying out plasma treatment on polytetrafluoroethylene for 5min with 50W and Ar atmosphere pressure of 50Pa, mixing the polytetrafluoroethylene subjected to the plasma treatment with glycidyl methacrylate, heating at 75 ℃ for 24h, washing with a solvent, filtering, and taking out solids to obtain the glycidyl methacrylate modified polytetrafluoroethylene;
s3: mixing polypropylene resin for an outer pipe layer, glycidyl methacrylate modified polytetrafluoroethylene, a nucleating agent for the outer pipe layer and an antioxidant, putting the mixture into a double-screw extruder for extrusion granulation to obtain mixed particles, putting the mixed particles into a plastic pipe extruder for melt extrusion, enabling the extrusion temperature to be 330 ℃, enabling the mixed particles to be uniformly coated on the outer surface of a steel pipe, cooling and shaping to form the polypropylene pipe outer pipe layer, and finally obtaining the polypropylene steel-plastic composite pipe. The thickness of the outer tube layer of the polypropylene tube is 1.5mm plus or minus 0.1mm.
Examples 2 to 5
Examples 2-5 differ from example 1 in the different amounts of the components in the raw materials of the polypropylene rigid plastic composite pipe, specifically shown in Table 1.
Table 1: content table of each component in raw material of polypropylene plastic composite pipe
Example 6
Example 6 differs from example 1 in that the polypropylene steel plastic composite pipe outer pipe layer raw material further comprises 3kg of polyethylene wax, and the inner pipe layer raw material further comprises 3kg of tackifier. Wherein the tackifier is commercially available tackifier Talkett 371.
The preparation method of the polypropylene steel-plastic composite pipe comprises the following steps:
s1: mixing polypropylene resin, AS resin, tackifier and nucleating agent, putting the mixture into a double-screw extruder for extrusion granulation to obtain mixed particles, putting the mixed particles into a plastic pipe extruder for melt extrusion, cooling and shaping at the extrusion temperature of 200 ℃, obtaining a polypropylene inner pipe, inserting the polypropylene inner pipe into a steel pipe, and then performing hot melt adhesion on the polypropylene inner pipe and the steel pipe to form a polypropylene inner pipe layer with the thickness of 2 mm+/-0.1 mm on the inner side of the steel pipe, thereby obtaining a polypropylene composite steel-plastic pipe semi-finished product;
s2: carrying out plasma treatment on polytetrafluoroethylene for 5min with the treatment power of 50W and the Ar atmosphere pressure of 50Pa, mixing the polytetrafluoroethylene subjected to the plasma treatment with glycidyl methacrylate, heating at 75 ℃ for 24h, washing with a solvent, filtering, and taking out solids to obtain the glycidyl methacrylate modified polytetrafluoroethylene;
s3: and mixing polypropylene resin, glycidyl methacrylate modified polytetrafluoroethylene, polyethylene wax, a nucleating agent and an antioxidant, putting the mixture into a double-screw extruder for extrusion granulation to obtain mixed particles, putting the mixed particles into a plastic pipe extruder for melt extrusion, wherein the extrusion temperature is 330 ℃, uniformly coating the mixed particles on the outer surface of a steel pipe, cooling and shaping to form a polypropylene pipe outer pipe layer, and finally obtaining the polypropylene steel-plastic composite pipe. The thickness of the outer tube layer of the polypropylene tube is 1.5mm plus or minus 0.1mm.
Example 7
Example 7 differs from example 6 in that the polyethylene wax used as the outer pipe layer raw material of the polypropylene steel plastic composite pipe is 5kg, and the tackifier used as the inner pipe layer raw material is 5kg.
Example 8
Example 8 differs from example 6 in that the polyethylene wax used as the outer pipe layer raw material of the polypropylene steel plastic composite pipe is 1kg, and the tackifier used as the inner pipe layer raw material is 1kg.
Example 9
Example 9 differs from example 6 in that the tackifier in the inner pipe layer raw material of the polypropylene steel plastic composite pipe is a styrene-butadiene-styrene block copolymer.
Example 10
Example 10 differs from example 6 in that the polyethylene wax in the outer tube stock of the polypropylene steel plastic composite tube was replaced with an equivalent amount of a commercially available lubricant, wherein the lubricant was butyl stearate.
Comparative example
Comparative example 1
Comparative example 1 differs from example 1 in that glycidyl methacrylate was not used in the raw material of the outer pipe layer of the polypropylene steel plastic composite pipe.
The preparation method of the polypropylene steel-plastic composite pipe comprises the following steps:
s1: mixing polypropylene resin and AS resin, extruding and granulating in a double-screw extruder to obtain mixed particles, then putting the mixed particles into a plastic pipe extruder for melt extrusion, cooling and shaping at the extrusion temperature of 200 ℃, obtaining a polypropylene inner pipe, inserting the polypropylene inner pipe into a steel pipe, then performing hot melt adhesion on the polypropylene inner pipe and the steel pipe, forming a polypropylene inner pipe layer on the inner side of the steel pipe, wherein the thickness of the polypropylene inner pipe layer is 2 mm+/-0.1 mm, and obtaining a polypropylene composite steel-plastic pipe semi-finished product;
s2: and then mixing polypropylene resin and polytetrafluoroethylene, putting the mixture into a double-screw extruder for extrusion granulation to prepare mixed particles, putting the mixed particles into a plastic pipe extruder for melt extrusion, enabling the extrusion temperature to be 330 ℃, enabling the mixed particles to be uniformly coated on the outer surface of a steel pipe, cooling and shaping to form a polypropylene pipe outer pipe layer, and finally obtaining the polypropylene steel-plastic composite pipe. The thickness of the outer tube layer of the polypropylene tube is 1.5mm plus or minus 0.1mm.
Comparative example 2 differs from example 1 in that polytetrafluoroethylene and glycidyl methacrylate are not used in the raw material of the outer tube layer of the polypropylene steel plastic composite tube.
The preparation method of the polypropylene steel-plastic composite pipe comprises the following steps:
s1: mixing polypropylene resin and AS resin, extruding and granulating in a double-screw extruder to obtain mixed particles, then putting the mixed particles into a plastic pipe extruder for melt extrusion, cooling and shaping at the extrusion temperature of 200 ℃, obtaining a polypropylene inner pipe, inserting the polypropylene inner pipe into a steel pipe, then performing hot melt adhesion on the polypropylene inner pipe and the steel pipe, forming a polypropylene inner pipe layer on the inner side of the steel pipe, wherein the thickness of the polypropylene inner pipe layer is 2 mm+/-0.1 mm, and obtaining a polypropylene composite steel-plastic pipe semi-finished product;
s2: and (3) extruding and granulating the polypropylene resin in a double-screw extruder to obtain mixed particles, putting the mixed particles in a plastic pipe extruder for melt extrusion, wherein the extrusion temperature is 200 ℃, uniformly coating the mixed particles on the outer surface of a steel pipe, and cooling and shaping to form a polypropylene pipe outer pipe layer, thereby finally obtaining the polypropylene steel-plastic composite pipe. The thickness of the outer tube layer of the polypropylene tube is 1.5mm plus or minus 0.1mm.
Comparative example 3
Comparative example 3 differs from example 1 in that AS resin was not used in the raw material of the inner pipe layer of the polypropylene steel plastic composite pipe.
Comparative example 4
Comparative example 4 is different from example 1 in that polytetrafluoroethylene and glycidyl methacrylate are not used AS the outer pipe layer raw material of the polypropylene steel plastic composite pipe, and AS resin is not used AS the inner pipe layer raw material.
Comparative example 5
Comparative example 5 is different from example 1 in that the amount of polytetrafluoroethylene used in the outer pipe layer of the polypropylene steel plastic composite pipe is 5kg, and the amount of AS resin used in the inner pipe layer raw material is 5kg.
Performance test
The following performance tests were performed on the polypropylene steel plastic composite pipes provided in examples 1 to 10 and comparative examples 1 to 5 of the present application, and the test result data are shown in table 2.
Detection method
1. Wear resistance
The abrasion resistance of the polypropylene steel-plastic composite pipe is detected by adopting the standard of GB/T3960-2016 method for testing sliding friction and abrasion of plastics.
2. Impact resistance
The impact strength of the polypropylene steel-plastic composite pipe is detected by adopting the standard of GB/T14152-2001 (clockwise rotation method of test method of external impact resistance of thermoplastic pipe).
3. Corrosion resistance
The method comprises the steps of weighing a polypropylene inner tube sample, weighing the initial weight of the sample, soaking the sample in a sodium hydroxide solution containing 40% of mass fraction, storing the sample in a constant temperature and humidity box for 90 days, taking out the sample, weighing the sample, and calculating the weight change percentage before and after.
Table 2: performance test data sheet
As can be seen from examples 1-5, the polypropylene steel-plastic composite pipe prepared by the method has excellent wear resistance, impact resistance and corrosion resistance. By respectively combining polytetrafluoroethylene and AS resin with polypropylene, the wear resistance and corrosion resistance of the polypropylene pipe are improved, the crystal structure of the polypropylene is improved, and the toughness and impact resistance of the polypropylene pipe are improved. Meanwhile, the polytetrafluoroethylene and the glycidyl methacrylate are subjected to graft polymerization, so that the adhesiveness of the polytetrafluoroethylene is improved, better combination between the polytetrafluoroethylene and the polypropylene is promoted, and the combination force of the polypropylene pipe and the steel pipe is enhanced. The polypropylene steel plastic composite pipe materials in examples 1-5 have different contents of each component, wherein example 1 is the most preferred example.
The polyethylene wax is added into the polypropylene outer pipe layer in examples 6-8, so that the friction coefficient of the polypropylene pipe can be reduced, the phenomena of scratch and friction are reduced, and the wear resistance of the polypropylene pipe is improved. Meanwhile, the polyethylene wax can improve the dispersibility of each molecule of the polypropylene resin system, and can also have a certain promotion effect on the impact resistance of the polypropylene pipe. In example 10, other compounds were used instead of the polyethylene wax, and it was found from the results of the test that the polyethylene wax had better properties.
Meanwhile, in the embodiments 6-8, the adhesion promoter is added into the polypropylene inner pipe layer, so that on one hand, the binding force between polypropylene and AS resin can be promoted, meanwhile, the polypropylene pipe and the steel pipe can be better combined, the phenomenon that the polypropylene pipe is easy to fall off from the steel pipe and is corroded is reduced, and the service life of the polypropylene pipe is further prolonged.
In example 9, the adhesion promoter in the polypropylene inner pipe layer material used a styrene-butadiene-styrene block copolymer, which on the one hand improved the binding force and corrosion resistance between the molecules of the polypropylene resin system. On the other hand, the styrene-butadiene-styrene segmented copolymer can improve the crystal structure of polypropylene, improve the toughness of polypropylene pipes and reduce the phenomena of cracking and corrosion of the polypropylene pipes. Meanwhile, the styrene-butadiene-styrene block copolymer can also absorb part of impact performance, so that the impact resistance of the polypropylene pipe is improved, and the service life of the polypropylene pipe is further prolonged. From the detection results, the corrosion resistance of the polypropylene pipe is better in example 9 than in example 6.
As is clear from comparative examples 1, 2 and 3, when the polypropylene composite pipe is prepared, any component is absent from polytetrafluoroethylene, glycidyl methacrylate and AS resin, the performance of the polypropylene composite pipe is reduced, the glycidyl methacrylate is not used in comparative example 2, the abrasion resistance of the polypropylene pipe is greatly affected, the grafting effect of the glycidyl methacrylate and the polytetrafluoroethylene is further illustrated, and the binding force of the polytetrafluoroethylene and the polypropylene is improved.
The polypropylene composite pipe in comparative example 4 has the worst performance, which indicates that the wear resistance and corrosion resistance of the common polypropylene pipe are limited, thereby affecting the service life of the polypropylene pipe.
In contrast, the comparative example 5 shows that the abrasion resistance and corrosion resistance of the polypropylene pipe are improved only to a limited extent AS the polytetrafluoroethylene and AS resin are used in different amounts, and the abrasion resistance and corrosion resistance of the polypropylene pipe are improved by the test result.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (8)
1. The utility model provides a wear-resisting corrosion-resistant polypropylene steel plastic composite pipe, its characterized in that includes outer tube layer, steel tube layer and interior tube layer, the steel tube layer sets up between outer tube layer and interior tube layer, outer tube layer is made by the raw materials including following parts by weight: 80-90 parts of polypropylene resin, 10-20 parts of polytetrafluoroethylene and 1-3 parts of polytetrafluoroethylene; the inner pipe layer is prepared from the following raw materials in parts by weight: 70-80 parts of polypropylene resin and 10-20 parts of AS resin.
2. The wear-resistant corrosion-resistant polypropylene steel plastic composite pipe according to claim 1, wherein: the outer pipe layer raw material also comprises 1-5 parts of polyethylene wax.
3. The wear-resistant corrosion-resistant polypropylene steel plastic composite pipe according to claim 1, wherein: the inner pipe layer raw material also comprises 1-5 parts of tackifier.
4. A wear-resistant corrosion-resistant polypropylene steel plastic composite pipe according to claim 3, wherein: the tackifier is a styrene-butadiene-styrene block copolymer.
5. The wear-resistant corrosion-resistant polypropylene steel plastic composite pipe according to claim 1, wherein: the outer pipe layer is prepared from the following raw materials in parts by weight: 82-87 parts of polypropylene resin, 13-17 parts of polytetrafluoroethylene and 1.5-2.5 parts of polytetrafluoroethylene; the inner pipe layer is prepared from the following raw materials in parts by weight: 73-78 parts of polypropylene resin and 13-17 parts of AS resin.
6. A method for preparing the wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe according to any one of claims 1 to 5, which is characterized in that: the method comprises the following steps:
s1: mixing polypropylene resin and AS resin, putting the mixture into an extruder to prepare a polypropylene inner pipe layer, and then carrying out hot melting compounding on the polypropylene inner pipe and a steel pipe;
s2: carrying out plasma treatment on polytetrafluoroethylene in advance, mixing with the polytetrafluoroethylene, and heating for reaction to obtain modified polytetrafluoroethylene; and mixing the polypropylene resin and the modified polytetrafluoroethylene, putting into an extruder for melt extrusion, coating one side of the steel pipe layer far away from the polypropylene inner pipe, cooling and shaping to obtain a polypropylene outer pipe layer, and finally obtaining the polypropylene steel-plastic composite pipe.
7. The method for preparing the wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe material is characterized by comprising the following steps of: in the step S2, the extrusion temperature of the extruder is 330-340 ℃.
8. The method for preparing the wear-resistant corrosion-resistant polypropylene steel-plastic composite pipe material is characterized by comprising the following steps of: the temperature of the reaction between polytetrafluoroethylene and heating is 70-80 ℃.
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