CN113185813A - Method for preparing rigid-strength pipe by utilizing recovered hybrid PET containing PE and PA6 - Google Patents
Method for preparing rigid-strength pipe by utilizing recovered hybrid PET containing PE and PA6 Download PDFInfo
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- CN113185813A CN113185813A CN202110532352.1A CN202110532352A CN113185813A CN 113185813 A CN113185813 A CN 113185813A CN 202110532352 A CN202110532352 A CN 202110532352A CN 113185813 A CN113185813 A CN 113185813A
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- antioxidant
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- extruder
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a method for preparing a rigid strength pipe by utilizing recovered hybrid PET containing PE and PA6, which is characterized in that the components are uniformly dispersed by regulating and controlling the distribution ratio of the components in the hybrid material and improving the selection aspect of a toughening agent SBR, the physical cross-linking points are increased by chain extension reaction, and the strength and the rigidity of the material are increased. The rigid strength pipe prepared by the invention has high performance, good toughness and wide application range.
Description
Technical Field
The invention relates to a PET (polyethylene terephthalate) recovery process, in particular to a method for preparing a rigid strength pipe by utilizing recovered hybrid PET containing PE and PA 6.
Background
The plastic industry in China has developed for a long time to form a complete industrial system, and becomes a basic material industry which is integrated with steel, cement and wood. The application of the current plastics has penetrated into various aspects of production and social life as one of the strut industries in the light industry, and the PET polyester has wide application in the production and life of human beings and can be used as packaging containers of beverages, foods and the like, fiber-grade polyester, polyester films, engineering plastics and the like. The waste material generated after the PET polyester is used is a necessary product in the consumption process of plastic products, and is a form of material resources, and the waste plastic has certain utilization value, for example, the waste plastic can be effectively utilized, so that the energy can be saved, and the environment can be purified. The invention provides a method for preparing a rigid strength pipe by utilizing recovered hybrid PET containing PE and PA6, wherein the components are uniformly dispersed by regulating and controlling the distribution ratio of the components in the hybrid material and improving the selection aspect of a toughening agent and the like, and the physical cross-linking points are increased by chain extension reaction, so that the strength and the rigidity of the material are increased. The rigid strength pipe prepared by the invention has high performance, good toughness and wide application range.
Disclosure of Invention
The inventor finds that the components are uniformly dispersed by regulating and controlling the distribution ratio of the components in the mixed material and improving the selection aspect of the toughening agent and the like, and the physical crosslinking points are increased by chain extension reaction, so that the strong rigidity of the material is increased.
Furthermore, the inventor also finds that the product performance is improved by adding two additives in a specific ratio step by step; the first auxiliary agent can further improve the compatibility of each component in the mixed material, promote the formation of physical cross-linking points in the material and improve the toughness and the strong rigidity of the material; the glass fiber in the second auxiliary agent can improve the toughness of the material, and in order to avoid the glass fiber from being cut off by a screw rod of the screw machine, the glass fiber is added through an exhaust port in the middle of the screw machine, so that the dispersion of the glass fiber can be realized, the glass fiber is prevented from being cut off by the screw rod, and the performance of the product is effectively improved. The silane coupling agent in the second auxiliary agent can improve the surface activity of the glass fiber and the dispersity of the glass fiber, and the lanthanum oxide in the second auxiliary agent is used as a nucleating agent to improve the crystallization temperature and promote the injection molding performance, and is added with the glass fiber to prevent the mixed material from crystallizing in advance to influence the dispersion of the glass fiber.
The specific scheme is as follows:
a method of making a rigid strength pipe from recycled hybrid PET containing PE and PA6, comprising:
1) vacuum drying a recovered PET mixed material containing PE and PA6, SBR, a chain extender, a compatilizer and an antioxidant at the drying temperature of 90-110 ℃ for 8-12h, wherein the PA6 accounts for 20-30% of the mixed material, and the PE accounts for 20-30% of the mixed material;
2) according to the PET mixed material: SBR: chain extender: a compatilizer: antioxidant = 100: 3-5: 6-8:20-30:5-10, mixing the PET mixed material with SBR, a chain extender, a compatilizer and an antioxidant for 1-2 hours at the temperature of 200-220 ℃ to obtain a mixture;
3) extruding the mixture using an extruder;
4) granulating;
5) and drying again and performing injection molding to obtain the rigid strength pipe.
Further, the chain extender is a styrene-acrylonitrile-glycidyl methacrylate copolymer.
Further, the compatibilizer is selected from: one or two of POE-g-MAH and POE-g-GMA.
Further, the antioxidant comprises an antioxidant main agent and an antioxidant auxiliary agent, wherein the antioxidant main agent is selected from the following components: DPN; the antioxidant auxiliary agent is DLTP.
Further, the extruder is a double-screw extruder, wherein the temperature distribution of each section is 200-260 ℃, and the injection molding temperature is 230-250 ℃.
Further, the double-screw extruder comprises a main material inlet, an auxiliary material inlet and a machine head outlet, the extruder is divided into five heating sections between a main material feed inlet and the machine head outlet of the extruder, the main material feed inlet and the auxiliary material inlet are positioned in a first heating section, the machine head outlet is positioned in a fifth heating section, the temperature of the first heating section is 200-plus-one, the temperature of the second heating section is 220-plus-one 230 ℃, the temperature of the third heating section is 230-plus-one 240 ℃, the temperature of the fourth heating section is 240-plus-one 250 ℃, and the temperature of the fifth heating section is 250-plus-one 260 ℃; the current of the extruder is 50.9A, and the melt pressure of the extruder is 15.7-18.0 MPa.
Further, the mixture of the PET mixed material, the chain extender, the compatilizer and the antioxidant is added from the main material inlet, the first auxiliary agent is added from the auxiliary material inlet, the mass of the first auxiliary agent is 5-15% of that of the mixture, and the first auxiliary agent is composed of 50-55% of isopropenyl triethoxysilane, 35-40% of dicumyl peroxide, 4-8% of dibutyltin dilaurate and 2-4% of triethylene diamine.
Further, an exhaust port is formed in the second heating section, a second auxiliary agent is added from the exhaust port, the mass of the second auxiliary agent is 10-15% of that of the mixture, and the second auxiliary agent is composed of 80-85% of alkali-free glass short fibers, 5-10% of a silane coupling agent and 8-10% of lanthanum oxide; the diameter of the short glass fiber is 8-15 micrometers, and the length of the short glass fiber is 3-4 millimeters.
The invention has the following beneficial effects:
1. the components are uniformly dispersed by regulating and controlling the distribution ratio of the components in the mixed material and improving the selection aspect of the toughening agent and the like, and the physical crosslinking points are increased by chain extension reaction, so that the strong rigidity of the material is increased;
2. the first auxiliary agent can further improve the compatibility of each component in the mixed material, promote the formation of physical cross-linking points in the material and improve the toughness and the strong rigidity of the material;
3. the glass fiber in the second auxiliary agent can improve the toughness of the material;
4. glass fiber is added through an exhaust port in the middle of the screw machine, so that the dispersion of the glass fiber can be realized, the glass fiber is prevented from being cut off by a screw, and the performance of the product is effectively improved;
5. the silane coupling agent in the second auxiliary agent can improve the surface activity of the glass fiber and improve the dispersity of the glass fiber.
The alloy prepared by the method has the advantages of high performance, wide application range, simple process, low cost and easy large-scale production.
Detailed Description
The present invention will be described in more detail with reference to specific examples, but the scope of the present invention is not limited to the examples.
Examples 1 to 2
The weight distribution ratio of each component in each example is shown in table 1. Vacuum drying the recovered PET mixed material containing 25wt% of PE and 25wt% of PA6, SBR, a chain extender, a compatilizer and an antioxidant at the drying temperature of 100 ℃ for 10 hours; mixing the PET mixed material with SBR, a chain extender, a compatilizer and an antioxidant for 2 hours at 220 ℃ according to the mass ratio, discharging, putting the raw material of the mixed material into a double-screw extruder for making materials, wherein the temperature of a first heating section of the extruder is 210 ℃, the temperature of a second heating section is 230 ℃, the temperature of a third heating section is 240 ℃, the temperature of a fourth heating section is 250 ℃, the temperature of a fifth heating section is 260 ℃, an exhaust port is arranged on the second heating section, the extrusion temperature is 260 ℃, the rotating speed is 322r/min, the current of the extruder is 50.9A, the melt pressure of the extruder is 15.7-18.0MPa, and granulating; drying again, injection molding at 240 ℃ to prepare sample strips, and testing the performance results according to the corresponding standards shown in Table 2.
TABLE 1 (Unit g)
A first auxiliary agent: 55% of isopropenyl triethoxysilane, 35% of dicumyl peroxide, 7% of dibutyltin dilaurate and 3% of triethylene diamine; a second auxiliary agent: 85% of alkali-free glass short fiber with the diameter of 10 microns and the length of 4 mm, 5% of silane coupling agent and 10% of lanthanum oxide.
TABLE 2
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention.
Claims (8)
1. A method of making a rigid strength pipe from recycled hybrid PET containing PE and PA6, comprising:
1) vacuum drying a recovered PET mixed material containing PE and PA6, SBR, a chain extender, a compatilizer and an antioxidant at the drying temperature of 90-110 ℃ for 8-12h, wherein the PA6 accounts for 20-30% of the mixed material, and the PE accounts for 20-30% of the mixed material;
2) according to the PET mixed material: SBR: chain extender: a compatilizer: antioxidant = 100: 3-5: 6-8:20-30:5-10, mixing the PET mixed material with SBR, a chain extender, a compatilizer and an antioxidant for 1-2 hours at the temperature of 200-220 ℃ to obtain a mixture;
3) extruding the mixture using an extruder;
4) granulating;
5) and drying again and performing injection molding to obtain the rigid strength pipe.
2. The method of claim 1, wherein the chain extender is a styrene-acrylonitrile-glycidyl methacrylate copolymer.
3. The method of claim 1, wherein the compatibilizing agent is selected from the group consisting of: one or two of POE-g-MAH and POE-g-GMA.
4. The method of claim 1, wherein the antioxidant comprises an antioxidant primary agent and an antioxidant auxiliary agent, and the antioxidant primary agent is selected from the group consisting of: DPN; the antioxidant auxiliary agent is DLTP.
5. The method as claimed in claim 1, wherein the extruder is a twin-screw extruder, wherein the temperature distribution of each section is 200-260 ℃ and the temperature of the injection molding is 230-250 ℃.
6. The method as claimed in claim 5, wherein the twin-screw extruder comprises a main material inlet, an auxiliary material inlet and a head outlet, the extruder is divided into five heating sections between a main material inlet and the head outlet of the extruder, the main material inlet and the auxiliary material inlet are located in a first heating section, the head outlet is located in a fifth heating section, the temperature of the first heating section is 200-220 ℃, the temperature of the second heating section is 220-230 ℃, the temperature of the third heating section is 230-240 ℃, the temperature of the fourth heating section is 240-250 ℃, and the temperature of the fifth heating section is 250-260 ℃; the current of the extruder is 50.9A, and the melt pressure of the extruder is 15.7-18.0 MPa.
7. The method of claim 6, wherein the mixture of the PET admixtures, the chain extender, the compatibilizer and the antioxidant is added through the main material inlet, the first auxiliary agent is added through the auxiliary material inlet, the mass of the first auxiliary agent is 5-15% of the mass of the mixture, and the first auxiliary agent is composed of 50-55% of isopropenyltriethoxysilane, 35-40% of dicumyl peroxide, 4-8% of dibutyltin dilaurate and 2-4% of triethylene diamine.
8. The method of claim 7, wherein the second heating section is provided with an air outlet, a second auxiliary agent is added from the air outlet, the mass of the second auxiliary agent is 10-15% of the mixture, the second auxiliary agent is composed of 80-85% of alkali-free glass short fiber, 5-10% of silane coupling agent and 8-10% of lanthanum oxide; the diameter of the short glass fiber is 8-15 micrometers, and the length of the short glass fiber is 3-4 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110532352.1A CN113185813A (en) | 2021-05-17 | 2021-05-17 | Method for preparing rigid-strength pipe by utilizing recovered hybrid PET containing PE and PA6 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110532352.1A CN113185813A (en) | 2021-05-17 | 2021-05-17 | Method for preparing rigid-strength pipe by utilizing recovered hybrid PET containing PE and PA6 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113185813A true CN113185813A (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110532352.1A Withdrawn CN113185813A (en) | 2021-05-17 | 2021-05-17 | Method for preparing rigid-strength pipe by utilizing recovered hybrid PET containing PE and PA6 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113185813A (en) |
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2021
- 2021-05-17 CN CN202110532352.1A patent/CN113185813A/en not_active Withdrawn
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210730 |
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| WW01 | Invention patent application withdrawn after publication |