CN111621113A - Anti-aging polyethylene pipeline material and preparation method thereof - Google Patents
Anti-aging polyethylene pipeline material and preparation method thereof Download PDFInfo
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- CN111621113A CN111621113A CN202010446302.7A CN202010446302A CN111621113A CN 111621113 A CN111621113 A CN 111621113A CN 202010446302 A CN202010446302 A CN 202010446302A CN 111621113 A CN111621113 A CN 111621113A
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
Abstract
The invention provides an anti-aging polyethylene pipeline material and a preparation method thereof, wherein the preparation method comprises the following steps: pre-irradiating polyethylene; adding pre-irradiated polyethylene, deionized water, beta hydroxyethyl methacrylate and sodium dodecyl benzene sulfonate into a reaction vessel, heating and stirring, heating to 85 ℃, and keeping for 2-3 hours; heating to 90 ℃ for reaction for 5-6h, and finishing the reaction; washing with water, filtering, and placing in a vacuum oven for 24h to obtain polyethylene grafted poly (beta-hydroxyethyl methacrylate); extracting with Soxhlet extractor, adding tetrahydrofuran, heating in water bath, extracting for 48 hr, taking out, and drying; taking out, adding carbon fiber, adding into a high-speed kneading machine, kneading, and discharging; the material is sent to a double-screw extruder and extruded and molded at the processing temperature of 195-200 ℃ to prepare the anti-aging polyethylene pipeline material. The anti-aging polyethylene pipeline material disclosed by the invention is good in mechanical property and good in anti-aging effect, and is suitable for being applied to municipal pipeline materials.
Description
Technical Field
The invention belongs to the field of materials, and particularly relates to an anti-aging polyethylene pipeline material and a preparation method thereof.
Background
With the wide application of polyethylene pipelines in water supply and drainage and gas pipe network construction in cities and towns in China, the polyethylene pipelines gradually become remarkable achievements in various fields of social production. Compared with the traditional steel and cement pipelines, the polyethylene pipeline has the characteristics of corrosion resistance, easiness in installation, good flexibility, excellent processing performance, environmental friendliness, safety and the like. However, polyethylene resin as a high polymer material sensitive to ultraviolet light and high temperature is rapidly degraded and aged under the conditions of strong ultraviolet radiation and high temperature, and the pipeline has the risks of surface embrittlement, reduced mechanical strength, failure of a welding joint and the like.
The polyethylene pipeline in China is rapidly developed from the 80 th of the 20 th century. In 1982, Shanghai has begun to use polyethylene pipe to transport city gas. As special equipment for gas transportation, polyethylene pipelines were mainly focused on the optimization design of mechanical properties, the efficiency of pipeline extrusion lines, and the strict control of the size of extruded pipelines. In the period, the novel polyethylene resin with high stress cracking resistance enters the market, the production process of high-efficiency pipeline extrusion is available, and the extrusion speed can reach more than one metric ton per hour. These developments play an important role in public areas such as plumbing, gas pipelines, and the like. However, the aging resistance of the current polyethylene pipeline is poor, so that the improvement of the aging resistance of the polyethylene pipeline has important significance for the cost and the prospect of the whole market.
Disclosure of Invention
The technical problem to be solved is as follows: the invention aims to provide an anti-aging polyethylene pipeline material and a preparation method thereof.
The technical scheme is as follows: the anti-aging polyethylene pipeline material is prepared by taking pre-irradiated polyethylene as a raw material, carrying out suspension grafting on the pre-irradiated polyethylene and beta hydroxyethyl polymethacrylate to obtain polyethylene grafted beta hydroxyethyl polymethacrylate, and carrying out molding and purification on the polyethylene grafted beta hydroxyethyl polymethacrylate.
According to the scheme, the thickness of the anti-aging polyethylene pipeline material is 2-4 cm.
According to the scheme, the grafting rate of the beta hydroxyethyl acrylate is 20-25%.
The preparation method of the anti-aging polyethylene pipeline material comprises the following steps:
(1) pre-irradiating polyethylene;
(2) adding pre-irradiated polyethylene, deionized water, beta hydroxyethyl methacrylate and sodium dodecyl benzene sulfonate into a reaction vessel, heating and stirring, heating to 85 ℃, and keeping for 2-3 hours;
(3) heating to 90 ℃ for reaction for 5-6h, and finishing the reaction;
(4) washing with water, filtering, and placing in a vacuum oven at 60 ℃ for 24h to obtain polyethylene grafted poly (beta-hydroxyethyl methacrylate);
(5) extracting with Soxhlet extractor, adding tetrahydrofuran, heating in water bath, extracting for 48h, taking out, and drying in 60 deg.C vacuum drying oven for 48 h;
(6) taking out, adding carbon fiber, adding into a high-speed kneader, kneading at a rotation speed of 1500r/min for 5-10min, and discharging;
(7) the material is sent to a double-screw extruder and extruded and molded at the processing temperature of 195-200 ℃ to prepare the anti-aging polyethylene pipeline material.
According to the scheme, the mass ratio of the pre-irradiated polyethylene, the deionized water, the beta hydroxyethyl methacrylate and the sodium dodecyl benzene sulfonate in the step (1) is 100: 700: 100: l.
According to the scheme, the length of the carbon fiber in the step (6) is 2-2.5cm, and the mass of the carbon fiber is 0.5-1% of the mass of the polyethylene grafted poly (beta-hydroxyethyl methacrylate) dried in the step (5).
The pre-irradiation grafting process includes first irradiating polymer in the absence of air, introducing air eliminated monomer, and irradiating the polymer to generate free radical for reaction with the monomer to produce grafted copolymer.
Has the advantages that:
1. the irradiated heat shrinkable material has the advantages of increased tensile strength, improved temperature resistance, improved wear resistance, improved aging resistance and the like.
2. The irradiation can crosslink the folded layers on the surface of the polyethylene fiber, so that the crystallization is continuous, and the modulus is improved.
3. The anti-aging polyethylene pipeline material disclosed by the invention is good in mechanical property and strong in anti-aging property, and is suitable for being applied to municipal pipeline materials.
Detailed Description
Example 1
The anti-aging polyethylene pipeline material is prepared by taking pre-irradiated polyethylene as a raw material, carrying out suspension grafting on the pre-irradiated polyethylene and beta hydroxyethyl polymethacrylate to obtain polyethylene grafted beta hydroxyethyl polymethacrylate, and carrying out molding and purification on the polyethylene grafted beta hydroxyethyl polymethacrylate.
The preparation method of the anti-aging polyethylene pipeline material comprises the following steps:
(1) irradiating polyethylene in the absence of air;
(2) pre-irradiated polyethylene, deionized water, beta hydroxyethyl methacrylate and sodium dodecyl benzene sulfonate are mixed according to the mass ratio of 100: 700: 100: l, adding the mixture into a reaction container, heating and stirring the mixture, raising the temperature to 85 ℃, and keeping the temperature for 2 hours;
(3) heating to 90 ℃ for reaction for 5h, and finishing the reaction;
(4) washing with water, filtering, and placing in a vacuum oven at 60 deg.C for 24h to obtain polyethylene grafted poly (beta-hydroxyethyl methacrylate), with grafting rate of 20.3%;
(5) extracting with Soxhlet extractor, adding tetrahydrofuran, heating in water bath, extracting for 48h, taking out, and drying in 60 deg.C vacuum drying oven for 48 h;
(6) taking out, adding carbon fiber with the length of 2-2.5cm, adding the carbon fiber into a high-speed kneader, kneading the mixture at the rotating speed of 1500r/min for 5min, and discharging the mixture, wherein the mass of the carbon fiber is 0.5% of that of the polyethylene grafted poly (beta-hydroxyethyl methacrylate) dried in the step (5);
(7) and (3) feeding the materials into a double-screw extruder, and extruding and molding at a processing temperature of 195 ℃ to prepare the anti-aging polyethylene pipeline material, wherein the thickness of the material is 2 cm.
The tensile strength was measured using GB/T1447-.
The impact strength was measured in GB/T1451-2005.
And (3) putting the material sample into a high-low temperature damp-heat aging box, and carrying out an aging experiment according to GB/T2573-2008. The test conditions are as follows: the constant temperature was 60 ℃, the relative humidity was 93%, and the aging time was 30 days.
Before aging: tensile strength: 61.3 MPa; notched impact strength: 0.443 kJ/m2
After 30 days of damp heat aging: tensile strength: 56.3 MPa; notched impact strength: 0.405 kJ/m2。
Example 2
The anti-aging polyethylene pipeline material is prepared by taking pre-irradiated polyethylene as a raw material, carrying out suspension grafting on the pre-irradiated polyethylene and beta hydroxyethyl polymethacrylate to obtain polyethylene grafted beta hydroxyethyl polymethacrylate, and carrying out molding and purification on the polyethylene grafted beta hydroxyethyl polymethacrylate.
The preparation method of the anti-aging polyethylene pipeline material comprises the following steps:
(1) irradiating polyethylene in the absence of air;
(2) pre-irradiated polyethylene, deionized water, beta hydroxyethyl methacrylate and sodium dodecyl benzene sulfonate are mixed according to the mass ratio of 100: 700: 100: l, adding the mixture into a reaction container, heating and stirring the mixture, raising the temperature to 85 ℃, and keeping the temperature for 2.5 hours;
(3) heating to 90 ℃ for reaction for 5.5h, and finishing the reaction;
(4) washing with water, filtering, and placing in a vacuum oven at 60 deg.C for 24h to obtain polyethylene grafted poly (beta-hydroxyethyl methacrylate), with a grafting rate of 22.6% as determined;
(5) extracting with Soxhlet extractor, adding tetrahydrofuran, heating in water bath, extracting for 48h, taking out, and drying in 60 deg.C vacuum drying oven for 48 h;
(6) taking out, adding carbon fiber with the length of 2-2.5cm, adding the carbon fiber into a high-speed kneader, kneading the mixture at the rotating speed of 1500r/min for 5min, and discharging the mixture, wherein the mass of the carbon fiber is 0.6% of that of the polyethylene grafted poly (beta-hydroxyethyl methacrylate) dried in the step (5);
(7) and (3) feeding the materials into a double-screw extruder, and extruding and molding at a processing temperature of 195 ℃ to prepare the anti-aging polyethylene pipeline material, wherein the thickness of the material is 2 cm.
The tensile strength was measured using GB/T1447-.
The impact strength was measured in GB/T1451-2005.
And (3) putting the material sample into a high-low temperature damp-heat aging box, and carrying out an aging experiment according to GB/T2573-2008. The test conditions are as follows: the constant temperature was 60 ℃, the relative humidity was 93%, and the aging time was 30 days.
Before aging: tensile strength: 62.6 MPa; notched impact strength: 0.449 kJ/m2
After 30 days of damp heat aging: tensile strength: 56.9 MPa; notched impact strength: 0.413 kJ/m2。
Example 3
The anti-aging polyethylene pipeline material is prepared by taking pre-irradiated polyethylene as a raw material, carrying out suspension grafting on the pre-irradiated polyethylene and beta hydroxyethyl polymethacrylate to obtain polyethylene grafted beta hydroxyethyl polymethacrylate, and carrying out molding and purification on the polyethylene grafted beta hydroxyethyl polymethacrylate.
The preparation method of the anti-aging polyethylene pipeline material comprises the following steps:
(1) irradiating polyethylene in the absence of air;
(2) pre-irradiated polyethylene, deionized water, beta hydroxyethyl methacrylate and sodium dodecyl benzene sulfonate are mixed according to the mass ratio of 100: 700: 100: l, adding the mixture into a reaction container, heating and stirring the mixture, raising the temperature to 85 ℃, and keeping the temperature for 2.5 hours;
(3) heating to 90 ℃ for reaction for 5.5h, and finishing the reaction;
(4) washing with water, filtering, and placing in a vacuum oven at 60 deg.C for 24h to obtain polyethylene grafted poly (beta-hydroxyethyl methacrylate), with a grafting rate of 23.5%;
(5) extracting with Soxhlet extractor, adding tetrahydrofuran, heating in water bath, extracting for 48h, taking out, and drying in 60 deg.C vacuum drying oven for 48 h;
(6) taking out, adding carbon fiber with the length of 2-2.5cm, adding the carbon fiber into a high-speed kneader, kneading the mixture at the rotating speed of 1500r/min for 8min, and discharging the mixture, wherein the mass of the carbon fiber is 0.5-1% of that of the polyethylene grafted poly (beta-hydroxyethyl methacrylate) dried in the step (5);
(7) and (3) feeding the materials into a double-screw extruder, and extruding and molding at the processing temperature of 200 ℃ to prepare the anti-aging polyethylene pipeline material, wherein the thickness of the material is 3 cm.
The tensile strength was measured using GB/T1447-.
The impact strength was measured in GB/T1451-2005.
And (3) putting the material sample into a high-low temperature damp-heat aging box, and carrying out an aging experiment according to GB/T2573-2008. The test conditions are as follows: the constant temperature was 60 ℃, the relative humidity was 93%, and the aging time was 30 days.
Before aging: tensile strength: 64.1 MPa; notched impact strength: 0.463 kJ/m2
After 30 days of damp heat aging: tensile strength: 57.8 MPa; notched impact strength: 0.434 kJ/m2。
Example 4
The anti-aging polyethylene pipeline material is prepared by taking pre-irradiated polyethylene as a raw material, carrying out suspension grafting on the pre-irradiated polyethylene and beta hydroxyethyl polymethacrylate to obtain polyethylene grafted beta hydroxyethyl polymethacrylate, and carrying out molding and purification on the polyethylene grafted beta hydroxyethyl polymethacrylate.
The preparation method of the anti-aging polyethylene pipeline material comprises the following steps:
(1) irradiating polyethylene in the absence of air;
(2) pre-irradiated polyethylene, deionized water, beta hydroxyethyl methacrylate and sodium dodecyl benzene sulfonate are mixed according to the mass ratio of 100: 700: 100: l, adding the mixture into a reaction container, heating and stirring the mixture, raising the temperature to 85 ℃, and keeping the temperature for 2 to 3 hours;
(3) heating to 90 ℃ for reaction for 6h, and finishing the reaction;
(4) washing with water, filtering, and placing in a vacuum oven at 60 deg.C for 24h to obtain polyethylene grafted poly (beta-hydroxyethyl methacrylate), wherein the grafting rate is determined to be 25%;
(5) extracting with Soxhlet extractor, adding tetrahydrofuran, heating in water bath, extracting for 48h, taking out, and drying in 60 deg.C vacuum drying oven for 48 h;
(6) taking out, adding carbon fibers with the length of 2-2.5cm, adding the carbon fibers into a high-speed kneader, kneading the mixture at the rotating speed of 1500r/min for 10min, and discharging the mixture, wherein the mass of the carbon fibers is 1% of that of the polyethylene grafted poly (beta-hydroxyethyl methacrylate) dried in the step (5);
(7) and (3) feeding the materials into a double-screw extruder, and extruding and molding at the processing temperature of 200 ℃ to prepare the anti-aging polyethylene pipeline material, wherein the thickness of the material is 4 cm.
The tensile strength was measured using GB/T1447-.
The impact strength was measured in GB/T1451-2005.
And (3) putting the material sample into a high-low temperature damp-heat aging box, and carrying out an aging experiment according to GB/T2573-2008. The test conditions are as follows: the constant temperature was 60 ℃, the relative humidity was 93%, and the aging time was 30 days.
Before aging: tensile strength: 64.7 MPa; notched impact strength: 0.467 kJ/m2
After 30 days of damp heat aging: tensile strength: 59.7 MPa; notched impact strength: 0.445 kJ/m2。
Claims (6)
1. An anti-aging polyethylene pipeline material is characterized in that: polyethylene subjected to pre-irradiation is taken as a raw material, suspension grafting is carried out on the polyethylene and poly beta hydroxyethyl methacrylate to obtain polyethylene grafted poly beta hydroxyethyl methacrylate, and the anti-aging polyethylene pipeline material is obtained through molding and purification.
2. The anti-aging polyethylene pipeline material as claimed in claim 1, wherein: the thickness of the anti-aging polyethylene pipeline material is 2-4 cm.
3. The anti-aging polyethylene pipeline material as claimed in claim 1, wherein: the grafting rate of the polyethylene grafted poly (beta-hydroxyethyl methacrylate) is 20-25%.
4. The preparation method of the anti-aging polyethylene pipeline material as claimed in claim 1, wherein the preparation method comprises the following steps: the method comprises the following steps:
(1) pre-irradiating polyethylene;
(2) adding pre-irradiated polyethylene, deionized water, beta hydroxyethyl methacrylate and sodium dodecyl benzene sulfonate into a reaction vessel, heating and stirring, heating to 85 ℃, and keeping for 2-3 hours;
(3) heating to 90 ℃ for reaction for 5-6h, and finishing the reaction;
(4) washing with water, filtering, and placing in a vacuum oven at 60 ℃ for 24h to obtain polyethylene grafted poly (beta-hydroxyethyl methacrylate);
(5) extracting with Soxhlet extractor, adding tetrahydrofuran, heating in water bath, extracting for 48h, taking out, and drying in 60 deg.C vacuum drying oven for 48 h;
(6) taking out, adding carbon fiber, adding into a high-speed kneader, kneading at a rotation speed of 1500r/min for 5-10min, and discharging;
(7) the material is sent to a double-screw extruder and extruded and molded at the processing temperature of 195-200 ℃ to prepare the anti-aging polyethylene pipeline material.
5. The preparation method of the anti-aging polyethylene pipeline material as claimed in claim 4, wherein the preparation method comprises the following steps: the mass ratio of the pre-irradiated polyethylene, the deionized water, the beta hydroxyethyl methacrylate and the sodium dodecyl benzene sulfonate in the step (1) is 100: 700: 100: l.
6. The anti-aging polyethylene pipeline material and the preparation method thereof as claimed in claim 1, characterized in that: the length of the carbon fiber in the step (6) is 2-2.5cm, and the mass of the carbon fiber is 0.5-1% of the mass of the polyethylene grafted poly (beta-hydroxyethyl methacrylate) dried in the step (5).
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| CN202010446302.7A CN111621113A (en) | 2020-05-25 | 2020-05-25 | Anti-aging polyethylene pipeline material and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114479150A (en) * | 2022-03-16 | 2022-05-13 | 图方便（苏州）环保科技有限公司 | Outdoor anti-aging pipeline material and preparation method thereof |
| CN116606491A (en) * | 2023-05-16 | 2023-08-18 | 广东诚和信新材料有限公司 | Anti-aging PE material and synthesis process thereof |
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| CN106633355A (en) * | 2016-12-28 | 2017-05-10 | 上海长园电子材料有限公司 | Shielding double-layer heat shrinkable casing pipe |
| CN107200902A (en) * | 2017-05-18 | 2017-09-26 | 吉林美高管道系统有限公司 | A kind of graft modification IXPE heat-resisting pipes and preparation method thereof |
| CN111925481A (en) * | 2020-08-24 | 2020-11-13 | 安徽联科水基材料科技有限公司 | Corrosion-resistant PE/PS alloy suitable for refrigerator liner and preparation method thereof |
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2020
- 2020-05-25 CN CN202010446302.7A patent/CN111621113A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1327011A (en) * | 2000-06-06 | 2001-12-19 | 中国科学院长春应用化学研究所 | Functional polyethylene and its preparing method |
| CN103160006A (en) * | 2011-12-15 | 2013-06-19 | 中国石油天然气股份有限公司 | Special polyethylene resin composition for tubing |
| CN106633355A (en) * | 2016-12-28 | 2017-05-10 | 上海长园电子材料有限公司 | Shielding double-layer heat shrinkable casing pipe |
| CN107200902A (en) * | 2017-05-18 | 2017-09-26 | 吉林美高管道系统有限公司 | A kind of graft modification IXPE heat-resisting pipes and preparation method thereof |
| CN111925481A (en) * | 2020-08-24 | 2020-11-13 | 安徽联科水基材料科技有限公司 | Corrosion-resistant PE/PS alloy suitable for refrigerator liner and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114479150A (en) * | 2022-03-16 | 2022-05-13 | 图方便（苏州）环保科技有限公司 | Outdoor anti-aging pipeline material and preparation method thereof |
| CN116606491A (en) * | 2023-05-16 | 2023-08-18 | 广东诚和信新材料有限公司 | Anti-aging PE material and synthesis process thereof |
| CN116606491B (en) * | 2023-05-16 | 2024-03-19 | 广东诚和信新材料有限公司 | Anti-aging PE material and synthesis process thereof |
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Application publication date: 20200904 |