CN115572432A - Branch deterioration resistant crosslinked polyethylene insulating material and preparation method and application thereof - Google Patents
Branch deterioration resistant crosslinked polyethylene insulating material and preparation method and application thereof Download PDFInfo
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
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Abstract
The invention provides a branch deterioration resistant crosslinked polyethylene insulating material, a preparation method and application thereof, and belongs to the technical field of high-voltage cable insulation. The crosslinked polyethylene insulating material disclosed by the invention adopts di-tert-butylperoxyisopropyl benzene (BIPB) as a crosslinking agent, 1 molecule of the BIPB crosslinking agent contains two peroxide bonds, and the crosslinked polyethylene insulating material has the advantages of high crosslinking efficiency, few crosslinking byproducts and the like, and the BIPB crosslinking agent can generate more free radicals when the insulating material is heated, so that more crosslinking points are formed with low-density polyethylene molecular chains, the crosslinking degree of the insulating material is improved, more crosslinked network structures are formed, and the electric tree branch aging phenomenon is further inhibited. Therefore, the crosslinked polyethylene insulating material provided by the invention has more excellent branch aging resistance, and meanwhile, the breakdown strength of the crosslinked polyethylene cable material is further improved, and the safety and reliability of the crosslinked polyethylene insulating cable can be effectively improved.
Description
Technical Field
The invention relates to the technical field of high-voltage cable insulation, in particular to a branch-degradation-resistant crosslinked polyethylene insulating material and a preparation method and application thereof.
Background
In recent years, with the increasing of the social and economic level, the proportion of electric power in terminal energy consumption is increasing, and a high-voltage cable is used as a power transmission carrier and is a key means for novel urban power grid transformation and capacity expansion and new energy grid connection.
The electrical branch aging phenomenon is an irreversible insulation failure process generated by the insulation of a high-voltage cable under the action of electricity, heat and other physical fields. Once generated, electrical tree branches develop at an extremely rapid rate, and once they grow through the insulation layer, electrical faults occur, thereby affecting the operational safety of the cable. Therefore, the phenomenon of electrical tree aging is a main factor causing the breakdown of the cable insulation and is also one of the key factors limiting the improvement of the high-voltage transmission voltage level.
In recent years, researchers propose that the nano-composite method is adopted to inhibit the aging of the crosslinked polyethylene insulated electrical branch of the high-voltage cable, but the problem of nano-filler agglomeration is easy to occur in the batch preparation process of the cable insulation, so that the electrical and mechanical properties of the cable insulation are obviously reduced, and the cable insulation is difficult to be practically applied. Therefore, how to develop the branch aging resistant high-voltage cable crosslinked polyethylene insulating material becomes a key problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a crosslinked polyethylene insulating material resistant to electrical dendrite degradation, a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a branch deterioration resistant crosslinked polyethylene insulating material which comprises the following preparation raw materials in parts by mass:
100 parts of low-density polyethylene resin, 1.0-3.0 parts of cross-linking agent, 0.5-1.0 part of main antioxidant and 0.5-1.0 part of auxiliary antioxidant;
the cross-linking agent is bis-tert-butylperoxyisopropyl benzene.
Preferably, the crosslinked polyethylene insulating material comprises the following preparation raw materials in parts by mass:
100 portions of low-density polyethylene resin, 1.5 to 2.5 portions of cross-linking agent, 0.5 to 1.0 portion of main antioxidant and 0.5 to 1.0 portion of auxiliary antioxidant.
Preferably, the primary antioxidant is antioxidant 1010.
Preferably, the secondary antioxidant is antioxidant 168.
The invention provides a preparation method of the branch-deterioration-resistant crosslinked polyethylene insulating material in the technical scheme, which comprises the following steps:
carrying out melt blending on low-density polyethylene resin, a cross-linking agent, a main antioxidant and an auxiliary antioxidant to obtain a pre-dispersed master batch;
and extruding and granulating the pre-dispersed master batch to obtain the branch-deterioration-resistant crosslinked polyethylene insulating material.
Preferably, the extrusion granulation is performed in a twin-screw extruder.
Preferably, the temperature of the twin-screw extruder is: the charging section is 105-135 ℃, the compression section is 110-135 ℃, the homogenization section is 110-135 ℃, and the head part is 110-135 ℃.
Preferably, the rotating speed of the double-screw extruder is 30-200 r/min.
Preferably, the twin-screw extruder is air-cooled for extrusion.
The invention provides an application of the branch deterioration resistant crosslinked polyethylene insulating material in the technical scheme or the branch deterioration resistant crosslinked polyethylene insulating material prepared by the preparation method in the technical scheme in a high-voltage cable.
The invention provides a branch deterioration resistant crosslinked polyethylene insulating material which comprises the following preparation raw materials in parts by mass: 100 portions of low-density polyethylene resin, 1.0 to 3.0 portions of cross-linking agent, 0.5 to 1.0 portion of main antioxidant and 0.5 to 1.0 portion of auxiliary antioxidant; the cross-linking agent is bis-tert-butyl cumene peroxide. The crosslinked polyethylene insulating material disclosed by the invention adopts di-tert-butylperoxyisopropyl benzene (BIPB) as a crosslinking agent, and compared with a currently commonly used dicumyl peroxide (DCP) crosslinking agent (one molecule of the DCP crosslinking agent only contains one peroxide bond), 1 molecule of the BIPB crosslinking agent contains two peroxide bonds, the crosslinked polyethylene insulating material has the advantages of high crosslinking efficiency, few crosslinking byproducts and the like, and the BIPB crosslinking agent can generate more free radicals when the insulating material is heated, so that more crosslinking points are formed with a low-density polyethylene molecular chain, the crosslinking degree of the insulating material is improved, more crosslinked network structures are formed (figure 1), and the electric branch aging phenomenon is further inhibited. Therefore, the crosslinked polyethylene insulating material provided by the invention has more excellent dendritic aging resistance, and a perfect three-dimensional crosslinked network structure can be formed by adopting the BIPB crosslinking agent, so that the breakdown strength of the crosslinked polyethylene cable material is further improved, and the safety and reliability of the crosslinked polyethylene insulating cable are effectively improved.
Compared with the traditional DCP crosslinking agent, the BIPB crosslinking agent has the characteristics of no color, no odor and the like, can obviously reduce the peculiar smell generated in the generation and processing of high-voltage cable insulating materials and the manufacturing process of high-voltage cables, and improves the environmental friendliness.
Drawings
FIG. 1 is a schematic view of a cross-linked structure in a typical cross-linked polyethylene;
FIG. 2 is a graph showing electrical dendritic degradation failure characteristics of the crosslinked polyethylene insulation prepared in example 1;
FIG. 3 is a graph of electrical dendritic degradation failure characteristics of the crosslinked polyethylene insulation prepared in example 2;
FIG. 4 is a graph of electrical dendritic degradation failure characteristics of the crosslinked polyethylene insulation prepared in example 3;
fig. 5 is a graph showing electrical dendrite degradation failure characteristics of the crosslinked polyethylene insulation prepared in comparative example 1;
fig. 6 is a comparison of electrical dendron lengths of crosslinked polyethylene insulation prepared in example 1, example 2, example 3 and comparative example 1.
Detailed Description
The invention provides a branch deterioration resistant crosslinked polyethylene insulating material which comprises the following preparation raw materials in parts by mass:
100 portions of low-density polyethylene resin, 1.0 to 3.0 portions of cross-linking agent, 0.5 to 1.0 portion of main antioxidant and 0.5 to 1.0 portion of auxiliary antioxidant;
the cross-linking agent is bis-tert-butylperoxyisopropyl benzene.
In the present invention, unless otherwise specified, all the required starting materials for the preparation are commercially available products well known to those skilled in the art.
The preparation raw materials of the crosslinked polyethylene insulating material comprise 100 parts by mass of low-density polyethylene resin; the low density polyethylene resin and the specification are not particularly limited in the present invention, and any commercially available product known in the art may be used.
Based on the mass portion of the low-density polyethylene resin, the preparation raw materials of the crosslinked polyethylene insulating material provided by the invention comprise 1.0-3.0 portions of crosslinking agent, preferably 1.5-2.5 portions; the cross-linking agent is bis-tert-butylperoxyisopropyl benzene (BIPB).
Based on the mass portion of the low-density polyethylene resin, the preparation raw material of the crosslinked polyethylene insulating material provided by the invention comprises 0.5-1.0 portion of main antioxidant. In the invention, the main antioxidant is preferably an antioxidant 1010, and the chemical component is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester.
Based on the mass portion of the low-density polyethylene resin, the preparation raw material of the crosslinked polyethylene insulating material provided by the invention comprises 0.5-1.0 portion of auxiliary antioxidant. In the invention, the auxiliary antioxidant is preferably antioxidant 168, and the chemical component is tris [2, 4-di-tert-butylphenyl ] phosphite.
The invention provides a preparation method of the branch-deterioration-resistant crosslinked polyethylene insulating material in the technical scheme, which comprises the following steps:
carrying out melt blending on low-density polyethylene resin, a cross-linking agent, a main antioxidant and an auxiliary antioxidant to obtain a pre-dispersed master batch;
and extruding and granulating the pre-dispersed master batch to obtain the branch degradation resistant crosslinked polyethylene insulating material.
The invention carries out melt blending on low-density polyethylene resin, a cross-linking agent, a main antioxidant and an auxiliary antioxidant to obtain the pre-dispersed master batch.
Before the melt blending is performed, the low density polyethylene resin is preferably dried in a blast type drying oven at 60 ℃ for 12 hours.
In the present invention, the melt blending is preferably carried out in a twin-screw extruder, the temperature of which is preferably: the charging section is 105-135 ℃, the compression section is 110-135 ℃, the homogenization section is 110-135 ℃, the head part is 110-135 ℃, and the following is more preferable: the charging section is 110-135 ℃, the compression section is 115-135 ℃, the homogenization section is 115-135 ℃, and the nose section is 115-135 ℃. In the present invention, the rotation speed of the twin-screw extruder is preferably 30 to 200r/min. Alternatively, the melt blending is preferably carried out in a twin roll or internal mixer; the twin-screw extruder, twin-roll mill or internal mixer is not particularly limited in the present invention, and any corresponding apparatus known in the art may be used.
After the melt blending is completed, the invention preferably crushes and then dries the obtained material to obtain the pre-dispersed master batch. The process of the present invention for the crushing and drying is not particularly limited, and may be performed according to a process well known in the art.
After the pre-dispersed master batch is obtained, the pre-dispersed master batch is extruded and granulated to obtain the crosslinked polyethylene insulating material.
In the present invention, the extrusion granulation is preferably carried out in a twin-screw extruder; the temperature of the twin-screw extruder is preferably: 105-135 ℃ of feeding section, 110-135 ℃ of compression section, 110-135 ℃ of homogenization section and 110-135 ℃ of nose section, and more preferably: the charging section is 110-135 ℃, the compression section is 115-135 ℃, the homogenization section is 115-135 ℃, and the head part is 115-135 ℃.
In the invention, the rotating speed of the double-screw extruder is preferably 30-200 r/min, and more preferably 50-150 r/min; the extrusion process of the twin-screw extruder is preferably air-cooled. The present invention is not particularly limited to the specific process of extrusion granulation, and the process may be performed according to a process known in the art.
After the extrusion granulation is finished, the obtained material is preferably dried to obtain the crosslinked polyethylene insulating material; the drying process is not particularly limited in the present invention, and may be performed according to a process well known in the art.
The invention provides an application of the branch deterioration resistant crosslinked polyethylene insulating material in the technical scheme or the branch deterioration resistant crosslinked polyethylene insulating material prepared by the preparation method in the technical scheme in a high-voltage cable. The method of the present invention is not particularly limited, and the method may be applied according to a method known in the art.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The crosslinked polyethylene insulating material is prepared from the following raw materials in parts by mass: 100 parts of low-density polyethylene resin; 2.0 parts of BIPB cross-linking agent; 1010 primary antioxidant 0.5 parts; 168 auxiliary antioxidant 0.5 parts;
the preparation method comprises the following steps:
1) Drying the low-density polyethylene resin in a blast type drying oven for 12 hours at 60 ℃;
2) Melting and blending the crosslinking agent, the main antioxidant and the auxiliary antioxidant and the low-density polyethylene resin dried in the step 1) in a double-screw extruder to obtain a pre-dispersed master batch; the temperature of the twin-screw extruder is set as follows: the feeding section is 110 ℃, the compression section is 115 ℃, the homogenization section is 115 ℃ and the nose section is 115 ℃; the rotating speed of the double-screw extruder is set as follows: 50r/min;
3) Crushing the pre-dispersed master batch obtained in the step 2) and then drying;
4) Adding the pre-dispersed master batch obtained in the step 3) into a double-screw extruder, extruding, granulating and drying to obtain a cable material; the temperature of the twin-screw extruder is as follows: the charging section is 110 ℃, the compression section is 115 ℃, the homogenization section is 115 ℃ and the nose section is 115 ℃; the rotating speed of the double-screw extruder is 50r/min; the extrusion process of the double-screw extruder adopts air cooling.
Example 2
The crosslinked polyethylene insulating material is prepared from the following raw materials in parts by mass: 100 parts of low-density polyethylene resin; 1.5 parts of BIPB cross-linking agent; 0.5 part of 1010 main antioxidant; 168 auxiliary antioxidant 0.5 parts;
the preparation method comprises the following steps:
1) Drying the low-density polyethylene resin in a blast type drying oven at 60 ℃ for 12h;
2) Melting and blending the cross-linking agent, the main antioxidant, the auxiliary antioxidant and the low-density polyethylene resin dried in the step 1) in a double-screw extruder to obtain a pre-dispersed master batch; the temperature of the twin-screw extruder is set as follows: the charging section is 110 ℃, the compression section is 115 ℃, the homogenization section is 115 ℃ and the nose section is 115 ℃; the rotating speed of the double-screw extruder is set as follows: 50r/min;
3) Crushing the pre-dispersed master batch obtained in the step 2) and then drying;
4) Adding the pre-dispersed master batch obtained in the step 3) into a double-screw extruder, extruding, granulating and drying to obtain a cable material; the temperature of the twin-screw extruder is as follows: the feeding section is 110 ℃, the compression section is 115 ℃, the homogenization section is 115 ℃ and the nose section is 115 ℃; the rotating speed of the double-screw extruder is 50r/min; the extrusion process of the double-screw extruder adopts air cooling.
Example 3
The crosslinked polyethylene insulating material is prepared from the following raw materials in parts by mass: 100 parts of low-density polyethylene resin; 1.0 part of BIPB cross-linking agent; 0.5 part of 1010 main antioxidant; 168 auxiliary antioxidant 0.5 parts;
the preparation method comprises the following steps:
1) Drying the low-density polyethylene resin in a blast type drying oven at 60 ℃ for 12h;
2) Melting and blending the cross-linking agent, the main antioxidant, the auxiliary antioxidant and the low-density polyethylene resin dried in the step 1) in a double-screw extruder to obtain a pre-dispersed master batch; the temperature of the twin-screw extruder is set as follows: the charging section is 110 ℃, the compression section is 115 ℃, the homogenization section is 115 ℃ and the nose section is 115 ℃; the rotating speed of the double-screw extruder is set as follows: 50r/min;
3) Crushing the pre-dispersed master batch obtained in the step 2) and then drying;
4) Adding the pre-dispersed master batch obtained in the step 3) into a double-screw extruder, extruding, granulating and drying to obtain a cable material; the temperature of the twin-screw extruder is as follows: the feeding section is 110 ℃, the compression section is 115 ℃, the homogenization section is 115 ℃ and the nose section is 115 ℃; the rotating speed of the double-screw extruder is 50r/min; the extrusion process of the double-screw extruder adopts air cooling.
Comparative example 1
The cable material is prepared from the following raw materials in parts by mass: 100 parts of low-density polyethylene resin; 2.0 parts of DCP crosslinking agent; 0.5 part of 1010 main antioxidant; 168 auxiliary antioxidant 0.5 portion.
The preparation method of the cable material comprises the following steps:
1) Drying the low-density polyethylene resin in a blast type drying oven for 12 hours at 60 ℃;
2) Melting and blending the cross-linking agent, the main antioxidant, the auxiliary antioxidant and the low-density polyethylene resin dried in the step 1) in a double-screw extruder to obtain a pre-dispersed master batch; the temperature of the twin-screw extruder is set as follows: the charging section is 110 ℃, the compression section is 115 ℃, the homogenization section is 115 ℃ and the nose section is 115 ℃; the rotating speed of the extruder is 50r/min;
3) Crushing the pre-dispersed master batch obtained in the step 2) and then drying;
4) Adding the pre-dispersed master batch obtained in the step 3) into a double-screw extruder, extruding, granulating and drying to obtain a cable material; the temperature of the twin-screw extruder is set as follows: the feeding section is 110 ℃, the compression section is 115 ℃, the homogenization section is 115 ℃ and the nose section is 115 ℃; the rotating speed of the double-screw extruder is set as follows: 50r/min; the extrusion process of the double-screw extruder adopts air cooling.
Performance testing
The crosslinked polyethylene insulations prepared in examples 1 to 3 and comparative example 1 were subjected to an electrical dendritic degradation failure test at the same voltage (6 kV) and temperature (70 ℃):
one) the cross-linked polyethylene insulation materials obtained in example 1, example 2, example 3 and comparative example 1 were prepared into steel needle embedded sheet-like test specimens. The concrete specification of the sample is 30mm (length) x 10mm (width) x 2mm (thickness); the distance between the tip of the steel needle and the bottom edge of the sample is 2mm;
secondly), applying power frequency alternating current voltage with an effective value of 6.0kV to the steel needle in a constant temperature environment of 70 ℃, and grounding the bottom edge of the sample;
and thirdly) taking the voltage application time as the starting time, and the experiment lasts for 40min in total. Meanwhile, the growth condition of the electric tree near the needle point in the insulation is recorded through a microscopic camera device.
And fourthly) selecting the electric tree morphology of each sample at 10min, 20min, 30min and 40min, recording the length of each sample, and obtaining the degradation experimental result of the insulated electric tree, wherein the test result is shown in figures 2-5.
Fig. 2 is a graph showing electrical dendrite degradation failure characteristics of the crosslinked polyethylene insulation prepared in example 1 (2.0 wt% represents the mass percentage of the crosslinking agent to the polyethylene resin). Wherein, (a) is the electric tree morphology at 10min in the electric tree degradation experiment of the sample in the embodiment 1, (b) is the electric tree morphology at 20min in the experiment, and (c) is the electric tree morphology at 30min in the experiment; (d) the appearance of the electric tree at 40min of experiment;
FIG. 3 is a graph showing electrical dendrite degradation failure characteristics of the crosslinked polyethylene insulation prepared in example 2 (1.5 wt% represents the mass percentage of the crosslinking agent to the polyethylene resin). Wherein, (a) is the electric tree morphology at 10min in the electric tree degradation experiment of the sample in the embodiment 2, (b) is the electric tree morphology at 20min in the experiment, and (c) is the electric tree morphology at 30min in the experiment; (d) the appearance of the electric tree at 40min of experiment;
FIG. 4 is a graph showing electrical dendrite degradation failure characteristics of the crosslinked polyethylene insulation prepared in example 3 (1.0 wt% represents the mass percentage of the crosslinking agent to the polyethylene resin). Wherein, (a) is the electric tree morphology at 10min of the electric tree degradation experiment of the sample in the embodiment 2, (b) is the electric tree morphology at 20min of the experiment, and (c) is the electric tree morphology at 30min of the experiment; (d) the appearance of the electric tree at 40min of the experiment;
FIG. 5 is a graph showing electrical dendrite degradation failure characteristics of the crosslinked polyethylene insulation material prepared in comparative example 1 (2.0 wt% represents the mass percentage of the crosslinking agent in the polyethylene resin), wherein (a) is the electrical dendrite morphology at 10min in the electrical dendrite degradation experiment of the sample in comparative example 1, (b) is the electrical dendrite morphology at 20min in the experiment, and (c) is the electrical dendrite morphology at 30min in the experiment; and (d) the morphology of the electrical tree at 40min of the experiment.
Counting the lengths of the electrical branch degradation channels in fig. 2, 3, 4 and 5, and obtaining the length results of the electrical branches as shown in fig. 6; fig. 6 is a comparison of electrical dendron lengths of crosslinked polyethylene insulation prepared in example 1, example 2, example 3 and comparative example 1. Judging the growth rate of the electrical tree branches by the slope. As can be seen from fig. 6, the crosslinked polyethylene insulation material prepared in comparative example 1 has a higher electrical dendritic growth rate, i.e., the electrical dendritic degradation in comparative example 1 is more severe, which indicates that the insulation resin-resistant performance of comparative example 1 is worse, and the cable materials prepared in examples 1 to 3 have better insulation resin-resistant performance than comparative example 1. In conclusion, the BIPB as the cross-linking agent is superior to the DCP as the cross-linking agent in the growth speed of the tree branches and the length of the electric tree branches along the direction of the electric field.
The data of comparative example 1, example 2, example 3 and comparative example 1 are analyzed, because the BIPB crosslinking agent contains two peroxide bonds in 1 molecule, and the DCP crosslinking agent contains only one peroxide bond in one molecule, when the insulating material is heated, the BIPB crosslinking agent can generate more free radicals, so that more crosslinking points are formed with low-density polyethylene molecular chains, the crosslinking degree of the insulating material is improved, more crosslinked network structures are formed, and the electrical dendritic aging phenomenon is inhibited.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The crosslinked polyethylene insulating material resistant to tree branch deterioration is characterized by comprising the following preparation raw materials in parts by mass:
100 parts of low-density polyethylene resin, 1.0-3.0 parts of cross-linking agent, 0.5-1.0 part of main antioxidant and 0.5-1.0 part of auxiliary antioxidant;
the cross-linking agent is bis-tert-butyl cumene peroxide.
2. The crosslinked polyethylene insulation material according to claim 1, wherein the crosslinked polyethylene insulation material comprises the following preparation raw materials in parts by mass:
100 portions of low-density polyethylene resin, 1.5 to 2.5 portions of cross-linking agent, 0.5 to 1.0 portion of main antioxidant and 0.5 to 1.0 portion of auxiliary antioxidant.
3. The crosslinked polyethylene insulation according to claim 1 or 2, wherein the primary antioxidant is antioxidant 1010.
4. The crosslinked polyethylene insulation according to claim 1 or 2, wherein the secondary antioxidant is antioxidant 168.
5. A method of preparing a crosslinked polyethylene insulation material resistant to tree degradation according to any of claims 1 to 4, comprising the steps of:
carrying out melt blending on low-density polyethylene resin, a cross-linking agent, a main antioxidant and an auxiliary antioxidant to obtain a pre-dispersed master batch;
and extruding and granulating the pre-dispersed master batch to obtain the branch-deterioration-resistant crosslinked polyethylene insulating material.
6. The method of claim 5, wherein the extrusion granulation is performed in a twin screw extruder.
7. The method for preparing as claimed in claim 6, wherein the temperature of the twin-screw extruder is: the charging section is 105-135 ℃, the compression section is 110-135 ℃, the homogenization section is 110-135 ℃, and the head part is 110-135 ℃.
8. The method as claimed in claim 6, wherein the twin-screw extruder is rotated at a speed of 30 to 200r/min.
9. The method of any one of claims 6 to 8, wherein the twin-screw extruder employs air cooling for extrusion.
10. Use of the dendrite degradation resistant crosslinked polyethylene insulation according to any one of claims 1 to 4 or the dendrite degradation resistant crosslinked polyethylene insulation prepared by the preparation method according to any one of claims 5 to 9 in a high voltage cable.
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| CN106554537A (en) * | 2016-10-17 | 2017-04-05 | 安徽省绿环电气股份有限公司 | A kind of high-voltage crosslinkable polyethylene power cable |
| CN113773568A (en) * | 2021-09-14 | 2021-12-10 | 浙江万马高分子材料集团有限公司 | Insulating material, preparation method and application thereof |
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| JPH09265841A (en) * | 1996-03-28 | 1997-10-07 | Fujikura Ltd | Crosslinked polyethylene insulation cable |
| CN106554537A (en) * | 2016-10-17 | 2017-04-05 | 安徽省绿环电气股份有限公司 | A kind of high-voltage crosslinkable polyethylene power cable |
| CN113773568A (en) * | 2021-09-14 | 2021-12-10 | 浙江万马高分子材料集团有限公司 | Insulating material, preparation method and application thereof |
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