CN109651776B - Waste PET composite material - Google Patents
Waste PET composite material Download PDFInfo
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- CN109651776B CN109651776B CN201811590140.3A CN201811590140A CN109651776B CN 109651776 B CN109651776 B CN 109651776B CN 201811590140 A CN201811590140 A CN 201811590140A CN 109651776 B CN109651776 B CN 109651776B
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Compositions Of Macromolecular Compounds (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a waste PET composite material, which is prepared by mixing and drying a silane coupling agent and waste resin powder according to a mass ratio of 1-10: 100; then mixing the waste PET and the polyolefin elastomer to obtain a mixture, wherein the mass ratio of the waste PET to the waste resin powder is 5-9:1-5, and the addition amount of the polyolefin elastomer accounts for 1-20% of the mass of the mixture; and extruding and granulating the mixture by a double-screw extruder. The invention develops a waste PET composite material through a modification technology, realizes the comprehensive utilization of waste PET and waste resin, and overcomes the defect of poor impact property of the waste PET.
Description
Technical Field
The invention belongs to the technical field of plastic material recycling, and particularly relates to a waste PET composite material.
Background
Polyethylene terephthalate (PET) is a variety of thermoplastic linear saturated resin in polyester with the largest yield and the widest application, and has the advantages of light weight, high strength, good air tightness, high transparency, excellent fatigue resistance, friction resistance and aging resistance, outstanding electrical insulation, certain rigidity and certain flexibility. China is a country with large PET production and consumption, huge consumption brings millions of tons of waste PET plastics every year, and the recycled PET plastic taking the waste PET plastics as the raw material has considerable yield and is one of important components of the recycled plastic. The annual output of PET bottles in China exceeds 600 hundred million, and because PET bottles are mostly disposable consumer goods and are almost completely discarded after being used, the quantity of the waste bottles generated is huge, and 65 percent of the waste PET bottles recycled at present in China are waste beverage bottles.
At present, the waste PET is mainly used for chemical fibers, spinning and the like, the market is saturated, and a new way for comprehensively utilizing waste PET resources is urgently needed to be developed. The PET material has the advantages of fatigue resistance, friction resistance, dimensional stability, organic solvent resistance, good weather resistance and the like, but also has the defect of poor impact resistance. The waste PET material has the same advantages and disadvantages as the virgin material, so the problem of poor impact property needs to be solved when the resource is recycled.
The waste resin powder has large production amount, and lacks practical treatment technology, and the material generated by the prior art has narrow application range.
Disclosure of Invention
The invention aims to develop a waste PET composite material by a modification technology aiming at the material characteristics of waste PET, aims to comprehensively utilize the waste PET and waste resin, and overcomes the defect of poor impact property of the waste PET. The purpose of the invention is realized by the following technical scheme.
A waste PET composite material comprises the following raw materials: the method comprises the following steps of crushing waste PET with the granularity of 1-10 cm, waste resin powder with the granularity of 40-100 meshes, a silane coupling agent and a polyolefin elastomer, wherein the preparation process comprises the following steps:
1) mixing a silane coupling agent and waste resin powder according to the mass ratio of 1-10: 100, and drying to obtain silanized waste resin powder;
2) weighing waste PET, drying, and mixing the waste PET with the waste silanized resin powder obtained in the step 1) and the polyolefin elastomer to obtain a mixture, wherein the mass ratio of the PET to the waste resin powder is 5-9:1-5, and the addition amount of the polyolefin elastomer accounts for 1-20% of the mass of the mixture;
3) extruding and granulating the mixture by a double-screw extruder, wherein the temperature of a material barrel of the extruder is 235-260 ℃, the temperature of a die head is 240-265 ℃, the rotating speed of a main machine is 150-180r/min, and the feeding speed is about 10-25 r/min.
The further optimization scheme is as follows: the silane coupling agent is a silane coupling agent A-X.
The further optimization scheme is as follows: the mass ratio of the waste resin powder to the polyolefin elastomer to the waste PET is as follows: 1-3:0.5-1.5:5-8.
The further optimization scheme is as follows: mixing by adopting a high-speed mixer in the step 1), wherein the mixing time is 10-30 min, and the mixing speed is as follows: 500-.
The further optimization scheme is as follows: mixing by adopting a high-speed mixer in the step 2), wherein the mixing time is 10-30 min, and the mixing speed is as follows: 500-.
Further: the waste resin powder is generated in the processing process of the circuit board or the processing process of electronic waste, is thermosetting resin and contains glass fiber.
The invention principle is as follows:
a large amount of waste resin powder is generated in the circuit board processing process, the waste resin powder is thermosetting resin, and simultaneously, the waste resin powder also contains glass fiber and has very strong rigidity. According to the invention, the composite material is prepared by utilizing the advantages of the waste resin and the waste PET, the problem of insufficient impact strength of the PET is effectively solved by the rigidity of the waste resin powder, and the toughness can be further improved by using POE and other elastomers.
The invention uses silane coupling agent to pretreat the waste resin powder, and mixes them fully to change the surface property of the resin powder and improve the compatibility with the waste PET; mixing the pretreated waste resin powder, waste PET and POE according to a certain proportion, and carrying out modification and melting granulation under the condition of a temperature suitable for granulating the PET.
The invention has the beneficial effects that:
1) compared with the waste PET, the composite material prepared by filling the modified waste resin powder serving as the filling material into the waste PET matrix has the advantages that the impact strength and the elongation at break are obviously improved.
2) According to the invention, through modification treatment, comprehensive utilization of waste PET and waste resin powder is realized, resources and energy are saved, and pollution emission is effectively reduced.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a scanning electron micrograph of waste PET;
FIG. 2 is a scanning electron micrograph of the composite;
FIG. 3 shows the results of the impact strength tests of examples 2 and 3;
FIG. 4 shows the results of the elongation at break tests of examples 2 and 3;
FIG. 5 shows the results of the flexural strength test of examples 2 and 3;
FIG. 6 shows the results of tensile strength tests of examples 2 and 3;
FIG. 7 shows the results of the elongation at break tests of examples 4 and 5;
FIG. 8 shows the results of the impact strength tests of examples 4 and 5;
FIG. 9 shows the results of the flexural strength test of examples 4 and 5;
FIG. 10 shows the results of tensile strength tests of examples 4 and 5;
FIG. 11 shows the results of the flexural strength tests of examples 6 and 7;
FIG. 12 shows the results of tensile strength tests of examples 8 and 9.
Detailed Description
Example 1
A waste PET composite material comprises the following raw materials: the crushing granularity is 1-10 cm waste PET, 40-100 mesh waste resin powder, a silane coupling agent and polyolefin elastomer (POE), and the preparation process comprises the following steps:
1) mixing a silane coupling agent and waste resin powder according to the mass ratio of 1-10: 100, and drying to obtain silanized waste resin powder;
2) weighing waste PET, drying, and mixing the waste PET with the waste silanized resin powder obtained in the step 1) and the polyolefin elastomer to obtain a mixture, wherein the mass ratio of the PET to the waste resin powder is 5-9:1-5, and the addition amount of the polyolefin elastomer accounts for 1-20% of the mass of the mixture;
3) extruding and granulating the mixture by a double-screw extruder, wherein the temperature of a material barrel of the extruder is 235-260 ℃, the temperature of a die head is 240-265 ℃, the rotating speed of a main machine is 150-180r/min, and the feeding speed is about 10-25 r/min.
The silane coupling agent is silane coupling agent A-X (KH-550 national drug group chemical agent Co., Ltd.).
Mixing by adopting a high-speed mixer in the step 1), wherein the mixing time is 10-30 min, and the mixing speed is as follows: 500-.
Mixing by adopting a high-speed mixer in the step 2), wherein the mixing time is 10-30 min, and the mixing speed is as follows: 500-.
The waste resin powder is generated in the processing process of the circuit board, is thermosetting resin and contains glass fiber.
The mass ratio of the waste resin powder to the polyolefin elastomer (POE) to the waste PET is preferably as follows: 1-3:0.5-1.5:5-8.
The impact strength of the PET/waste resin powder/A-x composite material is improved compared with the original impact strength by adding POE with different proportions, and the impact strength of the composite material is improved along with the increase of the POE adding proportion.
After POE with different proportions is added, the elongation at break of the PET/waste resin powder/A-x composite material is obviously improved, and the elongation at break is improved along with the increase of the adding proportion of the functionalized POE.
After POE with different proportions is added, the tensile strength of the PET/waste resin powder/A-x composite material is reduced compared with the original tensile strength, and the reduction amplitude of the tensile strength is increased along with the increase of the POE addition proportion.
After POE with different proportions is added, the bending strength of the PET/waste resin powder/A-x composite material is reduced compared with the original bending strength, and the reduction range of the bending strength is increased along with the increase of the POE addition proportion.
Example 2
Improvement is made on the basis of example 1, wherein the waste resin powder: POE: the mass ratio of the waste PET is defined as 1: 1: and 8, obtaining the composite material 1. The impact strength of composite 1 was increased by 3.4% over the waste PET as tested, see figure 3. The elongation at break, flexural strength and tensile strength are shown in FIGS. 4, 5 and 6.
Example 3
Improvement is made on the basis of example 2, wherein the waste resin powder: POE: the mass ratio of the waste PET is defined as 1: 1.5: 7.5, obtaining the composite material 2. The impact strength of composite 2 was increased by 14% over the waste PET as tested, see figure 3. The elongation at break, the bending strength and the tensile strength of the embodiment are tested to be in reasonable ranges, and the embodiment is the most preferred embodiment by comprehensive evaluation. The elongation at break, flexural strength and tensile strength are shown in FIGS. 4, 5 and 6.
Example 4
Improvement is made on the basis of example 1, wherein the waste resin powder: POE: the mass ratio of the waste PET is defined as 3: 0.6: 6.4, obtaining the composite material 3. The elongation at break of composite 3 was increased by 28% over the waste PET as tested, see figure 7. The impact strength, bending strength and tensile strength are shown in FIGS. 8, 9 and 10.
Example 5
Improvement is made on the basis of example 4, wherein the waste resin powder: POE: the mass ratio of the waste PET is defined as 3: 1.5: 5.5, obtaining the composite material 4. The elongation at break of the tested composite 4 was increased by 85% over the waste PET, see fig. 7. The impact strength, bending strength and tensile strength are shown in FIGS. 8, 9 and 10.
Example 6
On the basis of example 1, the waste resin powder: POE: the mass ratio of the waste PET is defined as 3: 1: 6, obtaining the composite material 5. The flexural strength of the tested composite 5 was reduced by 34% compared to the waste PET, see fig. 11.
Example 7
On the basis of example 1, the waste resin powder: POE: the mass ratio of the waste PET is defined as 2: 1.5: 6.5, obtaining the composite material 6. The flexural strength of the tested composite 6 was reduced by 41% compared to the waste PET, see fig. 11.
Example 8
On the basis of example 1, the waste resin powder: POE: the mass ratio of the waste PET is defined as 2: 0.6: 7.4, obtaining the composite material 7. The tensile strength of the tested composite 7 was reduced by 6% compared to the waste PET, see fig. 12.
Example 9
On the basis of example 1, the waste resin powder: POE: the mass ratio of the waste PET is defined as 2: 1: 7, obtaining the composite material 8. The tensile strength of the tested composite 8 was reduced by 32% compared to the waste PET, see fig. 12.
Claims (2)
1. A waste PET composite material is characterized in that: the raw materials comprise: the method comprises the following steps of crushing waste PET with the granularity of 1-10 cm, waste resin powder with the granularity of 40-100 meshes, a silane coupling agent and a polyolefin elastomer, wherein the preparation process comprises the following steps:
1) mixing a silane coupling agent and waste resin powder according to the mass ratio of 1-10: 100, and drying to obtain silanized waste resin powder;
2) weighing waste PET, drying, and mixing the waste PET with the waste silanized resin powder and the polyolefin elastomer obtained in the step 1) to obtain a mixture, wherein the mass ratio of the waste PET to the waste resin powder is 5-9:1-5, and the addition amount of the polyolefin elastomer accounts for 1-20% of the mass of the mixture; mixing by adopting a high-speed mixer for 10-30 min at the mixing speed: 500-;
3) extruding and granulating the mixture by a double-screw extruder, wherein the temperature of a material barrel of the extruder is 235-260 ℃, the temperature of a die head is 240-265 ℃, the rotating speed of a main machine is 150-180r/min, and the feeding speed is about 10-25 r/min;
the waste resin powder is generated in the processing process of the circuit board or the processing process of electronic waste, is thermosetting resin and contains glass fiber; the silane coupling agent is a silane coupling agent A-X;
the mass ratio of the waste resin powder to the polyolefin elastomer to the waste PET is as follows: 1-3:0.5-1.5:5-8.
2. The waste PET composite material according to claim 1, characterized in that: mixing by adopting a high-speed mixer in the step 1), wherein the mixing time is 10-30 min, and the mixing speed is as follows: 500-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811590140.3A CN109651776B (en) | 2018-12-25 | 2018-12-25 | Waste PET composite material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811590140.3A CN109651776B (en) | 2018-12-25 | 2018-12-25 | Waste PET composite material |
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| CN109651776A CN109651776A (en) | 2019-04-19 |
| CN109651776B true CN109651776B (en) | 2020-08-18 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735579A (en) * | 2009-12-25 | 2010-06-16 | 华南师范大学 | High-performance recovered PET/ABS alloy |
| CN102226023A (en) * | 2011-05-04 | 2011-10-26 | 佛山市南海承骏科技有限公司 | Composite board based on mixed waste polymers and preparation method thereof |
| EP2268472B1 (en) * | 2008-04-12 | 2017-07-19 | Voss Automotive GmbH | Method for producing a moulded part with an annular cross-section and moulded part produced according to a method of this type |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103087458B (en) * | 2013-02-04 | 2014-08-20 | 清华大学 | Waste printed circuit board non-metal powder/ABS rein composite material and its preparation method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2268472B1 (en) * | 2008-04-12 | 2017-07-19 | Voss Automotive GmbH | Method for producing a moulded part with an annular cross-section and moulded part produced according to a method of this type |
| CN101735579A (en) * | 2009-12-25 | 2010-06-16 | 华南师范大学 | High-performance recovered PET/ABS alloy |
| CN102226023A (en) * | 2011-05-04 | 2011-10-26 | 佛山市南海承骏科技有限公司 | Composite board based on mixed waste polymers and preparation method thereof |
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Inventor after: Guo Yuwen Inventor after: Ruan Jiuli Inventor after: Bi Yingying Inventor after: Qiao Qi Inventor after: Yang Jianxia Inventor after: Yao Yang Inventor after: Wang Yibo Inventor before: Guo Yuwen Inventor before: Ruan Jiuli Inventor before: Bi Yingying Inventor before: Qiao Qi Inventor before: Yang Jianxia |
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