CN108794855B - PE/PET composite material and preparation method thereof - Google Patents
PE/PET composite material and preparation method thereof Download PDFInfo
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- CN108794855B CN108794855B CN201810546829.XA CN201810546829A CN108794855B CN 108794855 B CN108794855 B CN 108794855B CN 201810546829 A CN201810546829 A CN 201810546829A CN 108794855 B CN108794855 B CN 108794855B
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- 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
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Abstract
The invention belongs to the technical field of preparation of high polymer materials, and particularly relates to a PE/PET composite material and a preparation method thereof. The method utilizes a high polymer material plasticizing transportation device based on extensional rheology to process the PE/PET composite material, so that the materials are melted and mixed in an extensional flow field, the velocity gradient of the material solution is consistent with the flow direction, and dispersed phase particle groups are subjected to a larger external force tearing action without rotation, so that the materials can be more effectively crushed and dispersed, and a blending system with smaller particle size and more uniform particle distribution is obtained. The method does not need to add a compatilizer, and can reduce the cost. The composite material has good compatibility of raw materials, high tensile strength and impact strength, good ductility, and the advantages of PE and PET materials, and has wide application prospect in the fields of automobiles, electronic and electric appliances, mechanical instruments, thin film products and the like.
Description
Technical Field
The invention belongs to the technical field of preparation of high polymer materials, and particularly relates to a PE/PET composite material and a preparation method thereof.
Background
Polyethylene (PE) yields are the top five general plastics, including High Density Polyethylene (HDPE), Low Density Polyethylene (LDPE), Linear Low Density Polyethylene (LLDPE), and metallocene polyethylene (mPE). Polyethylene can be processed by blow molding, extrusion, and injection molding. Because of its good toughness, transparency and processability, it is widely used in the fields of films, hollow products, fibers and daily sundry goods. However, polyethylene has disadvantages of low strength and poor heat resistance, which limits its further applications.
In contrast, polyethylene terephthalate (PET) has the characteristics of high strength, high heat resistance, high chemical resistance, low price and the like as engineering plastics, and is widely applied to the industries of automobiles, motors, electronics, household appliances, machinery and the like. However, polyethylene terephthalate has disadvantages of poor impact properties, difficulty in molding, and the like, and its application is also limited. Therefore, the existing research combines PE and PET, so that the defects of the two materials can be mutually compensated, and the PE/PET composite material with the advantages of PE and PET can be obtained,
the traditional processing method of the PE/PET composite material is mainly extrusion molding. The material is mainly subjected to the action of a shearing flow field in the processing process of the screw extruder. In the shearing flow field, the velocity gradient formed by the materials is vertical to the flow direction of the melt, the flow mode is not favorable for mutual diffusion and permeation of polymer molecules among the velocity gradients, the materials tend to be rotationally conveyed in the shearing flow field, the crushing and dispersing effects of external force on dispersed phase particles are reduced, and therefore the plasticizing and mixing effects of the blend are poor. Therefore, when extrusion molding, not only the compatibilizer needs to be added additionally to improve the blending effect, but also the mechanical properties of the obtained composite material can not meet the ideal requirements.
Disclosure of Invention
To overcome the disadvantages and shortcomings of the prior art, the primary object of the present invention is to provide a method for preparing a PE/PET composite material.
The invention also aims to provide the PE/PET composite material obtained by the preparation method.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of a PE/PET composite material comprises the following steps: mixing the PE and the PET, mixing in a high-speed mixer, then carrying out melt blending by adopting a high polymer material plasticizing transportation device based on extensional rheology, carrying out extrusion molding, cooling, air-drying, granulating and drying to obtain the PE/PET composite material.
Wherein, the polymer material plasticizing and transporting equipment based on extensional rheology is invented by Dianthus superbus of south China university of marble (Chinese patent CN101219565A)
Preferably, the PE is high density polyethylene, low density polyethylene, linear low density polyethylene or metallocene polyethylene.
Preferably, the intrinsic viscosity of the PET is 0.83 to 1.40 dl/g.
Preferably, the mixture ratio of the PE and PET mixed ingredients is as follows by mass percent: 70-90% of PE and 10-30% of PET.
Preferably, the mixing time in the high-speed mixer is 10-30 min.
Preferably, the temperature of the polymer material plasticizing transportation equipment based on extensional rheology during melt blending is 230-270 ℃.
Preferably, the rotor speed is 30-120 r/min when the polymer material plasticizing transportation equipment based on the extensional rheology is adopted for melt blending.
The invention further provides the PE/PET composite material obtained by the preparation method.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention utilizes the high polymer material plasticizing transportation equipment based on the extensional rheology to process the PE/PET composite material, and the material is subjected to the action of an extensional flow field in the processing process. In the stretching flow field, the velocity gradient of the material melt is consistent with the flow direction, under the same deformation rate, the dispersed phase particle clusters are subjected to a larger external force to tear, and the particle clusters do not rotate in the transportation process, so that the particles can be further effectively crushed and dispersed, a blending system with smaller particle size and more uniform particle distribution is obtained, and better mixing effect and dispersion efficiency can be obtained compared with a shearing flow field.
(2) The PE/PET composite material prepared by the invention does not need to be added with a compatilizer, so that the cost can be reduced. The composite material has good compatibility of raw materials, high tensile strength and impact strength, good ductility, and the advantages of PE and PET materials, and has wide application prospect in the fields of automobiles, electronic and electric appliances, mechanical instruments, thin film products and the like.
Drawings
FIG. 1 is a scanning electron micrograph of the PE/PET composite prepared in example 1.
FIG. 2 is a scanning electron micrograph of a PE/PET composite material of a comparative example prepared in example 1.
FIG. 3 is a scanning electron micrograph of the PE/PET composite prepared in example 2.
FIG. 4 is a scanning electron micrograph of a PE/PET composite material of a comparative example prepared in example 2.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto. For process parameters not specifically noted, reference may be made to conventional techniques.
The PE used in the following examples was purchased from Exxon Mobil, model 1018 HA.
PET is purchased from Guangzhou extensive polyester Co., Ltd, type FY1002, and has an intrinsic viscosity of 0.83 to 1.40 dl/g.
Example 1
The embodiment provides a PE/PET composite material and a preparation method thereof, and provides a corresponding comparison example.
The PE/PET composite material comprises the following components in percentage by mass: 70% of PE and 30% of PET.
The preparation method comprises the following steps: mixing the PE and the PET according to the mass percentage ratio, mixing the mixture in a high-speed mixer for 30 minutes, carrying out melt blending by adopting high polymer material plasticizing and transporting equipment based on extensional rheology, wherein the melting temperature of each section is 230-.
Comparative example: the PE and the PET are mixed according to the mass percentage ratio, then mixed in a high-speed mixer for 30 minutes, and then melted and blended by a traditional double-screw extruder, wherein the melting temperature of each section is 230-.
Example 2
The embodiment provides a PE/PET composite material and a preparation method thereof, and provides a corresponding comparison example.
The PE/PET composite material comprises the following components in percentage by mass: 80% of PE and 20% of PET.
The preparation method comprises the following steps: mixing the PE and the PET according to the mass percentage ratio, mixing the mixture in a high-speed mixer for 30 minutes, carrying out melt blending by adopting high polymer material plasticizing and transporting equipment based on extensional rheology, wherein the melting temperature of each section is 230-.
Comparative example: the PE and the PET are mixed according to the mass percentage ratio, then mixed in a high-speed mixer for 30 minutes, and then melted and blended by a traditional double-screw extruder, wherein the melting temperature of each section is 230-.
The PE/PET composite materials in the examples 1 and 2 and the PE/PET composite material in the comparative example are tested for tensile strength and elongation at break by referring to GB/T1040-2006, and the results are shown in Table 1. It can be seen that the PE/PET composite material prepared based on the tensile flow field has higher tensile strength, more excellent elongation at break, i.e., excellent ductility, compared to the PE/PET composite material prepared based on the conventional shear flow field. The PE/PET composite material prepared based on the stretching flow field has the condition of failure of breaking.
TABLE 1 PE/PET COMPOSITE MATERIAL MECHANICAL PROPERTIES TABLE FOR EXAMPLES 1 AND 2 AND COMPARATIVE EXAMPLES THEREOF
The microscopic morphologies of the PE/PET composite materials of examples 1 and 2 and the PE/PET composite material of the comparative example were observed by using a scanning electron microscope, and the results are shown in fig. 1 to 4, which shows that compared with the PE/PET composite material prepared by the conventional shear flow field, the PE/PET composite material prepared based on the tensile flow field has a better interface, smaller particle size and more uniform distribution, and the two phases can be well mixed without using a compatibilizer.
Example 3
The embodiment provides a PE/PET composite material and a preparation method thereof.
The PE/PET composite material comprises the following components in percentage by mass: 90% of PE and 10% of PET.
The preparation method comprises the following steps: mixing the PE and the PET according to the mass percentage ratio, mixing the mixture in a high-speed mixer for 10 minutes, carrying out melt blending by adopting a high polymer material plasticizing and transporting device based on extensional rheology, wherein the melting temperature of each section is 230-.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. A preparation method of a PE/PET composite material is characterized by comprising the following steps: mixing the PE and the PET according to the mass ratio of 7:3, mixing in a high-speed mixer, then carrying out melt blending by adopting high polymer material plasticizing transportation equipment based on extensional rheology as described in CN101219565A, wherein the melting temperature of each section is 230-.
2. The method for preparing a PE/PET composite according to claim 1, characterized in that: the PE is high-density polyethylene, low-density polyethylene, linear low-density polyethylene or metallocene polyethylene.
3. The method for preparing a PE/PET composite according to claim 1, characterized in that: the intrinsic viscosity of the PET is 0.83 dl/g.
4. The method for preparing a PE/PET composite according to claim 1, characterized in that: the mixing time in the high-speed mixer is 10-30 min.
5. A PE/PET composite material, which is characterized in that: the preparation method of any one of claims 1 to 4.
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| CN110194862A (en) * | 2019-05-28 | 2019-09-03 | 佛山精展科技有限公司 | One kind being based on the fire-retardant PE CABLE MATERIALS of draft flowing deformation technology and its continuous preparation method |
| CN112778727B (en) * | 2021-01-29 | 2021-11-23 | 华南理工大学 | PLA/PCL conductive composite material and preparation method and application thereof |
| CN113416357A (en) * | 2021-06-28 | 2021-09-21 | 华南理工大学 | rPE/UHMWPEF composite material and preparation method and application thereof |
| CN115257113A (en) * | 2022-06-24 | 2022-11-01 | 江苏祺胜现代新材料有限公司 | PET composite material for automobile sound insulation pad and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346845A (en) * | 2001-09-25 | 2002-05-01 | 四川大学 | Process and apparatus for preparing polyolefin/polyglycol terephthalate in-situ micro-fibril reinforced composite material |
| CN101219565A (en) * | 2008-01-25 | 2008-07-16 | 华南理工大学 | Polymer material plasticizing and transporting method and apparatus based on draft flowing deformation |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346845A (en) * | 2001-09-25 | 2002-05-01 | 四川大学 | Process and apparatus for preparing polyolefin/polyglycol terephthalate in-situ micro-fibril reinforced composite material |
| CN101219565A (en) * | 2008-01-25 | 2008-07-16 | 华南理工大学 | Polymer material plasticizing and transporting method and apparatus based on draft flowing deformation |
Non-Patent Citations (1)
| Title |
|---|
| "Morphology Study of Immiscible Polymer Blends in a Vane Extruder";Jin-Ping Qu等;《J. APPL. POLYM. SCI》;20131231;第3584页结论部分 * |
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Effective date of registration: 20230419 Address after: 510000 Room 101, building 4, No. 23, YUNPU 1st Road, Huangpu District, Guangzhou, Guangdong Patentee after: GUANGZHOU JEEPINE INTELLIGENT COMPRESSION MOLDING MACHINE Co.,Ltd. Address before: 510640 No. five, 381 mountain road, Guangzhou, Guangdong, Tianhe District Patentee before: SOUTH CHINA University OF TECHNOLOGY |
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