CN109294077A - Electric branch suppressing method based on POSS regulation ethylene propylene diene rubber - Google Patents
Electric branch suppressing method based on POSS regulation ethylene propylene diene rubber Download PDFInfo
- Publication number
- CN109294077A CN109294077A CN201811069239.9A CN201811069239A CN109294077A CN 109294077 A CN109294077 A CN 109294077A CN 201811069239 A CN201811069239 A CN 201811069239A CN 109294077 A CN109294077 A CN 109294077A
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- CN
- China
- Prior art keywords
- ethylene propylene
- propylene diene
- diene rubber
- rubber
- electric branch
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- 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
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
Abstract
The invention discloses a kind of electric branch suppressing methods based on POSS regulation ethylene propylene diene rubber: moisture removal is removed in OVPOSS nanometers of drying；Double roll mill roller is heated, roll spacing and baffle spacing are adjusted, puts into ethylene propylene diene rubber, is kneaded and takes out, cleans double roller；Ethylene propylene diene rubber raw rubber is put into, is kneaded, roll banding；OVPOSS nanometers are weighed, is added in ethylene propylene diene rubber matrix, is kneaded uniform；It weighs double 2,5 vulcanizing agents to be added in double roll mill, mixing obtains rubber unvulcanizate；Rubber unvulcanizate is weighed, is put between two layers of PET film, is put into the mold of high-temperature thermo-compression formation machine, hot pressing, takes out film after cooling；Film is hung in convection oven, and vulcanization obtains modified ternary ethlene propyene rubbercompound material print；The functional group for analyzing modified ternary ethlene propyene rubbercompound material print constitutes and cross-section morphology, initial probability, electric branch form and growth length feature.
Description
Technical field
The present invention relates to a kind of high-voltage direct-current cable accessory ethylene propylene diene monomer (EPDM) material electric branch insulation degradation inhibition sides
Method, more specifically, it relates to a kind of electric branch suppressing methods based on POSS regulation ethylene propylene diene rubber.
Background technique
Development and national new energy implementation, the AC and DC high-tension cable in China due to China's urban distribution network make
Dosage increases year by year.Cross-inked polyethylene power cable is since its simple production process, laying are easy and have good electrical resistance
Energy and heat resistance, substantially instead of conventional paper oil insulation cable.In high-tension cable transmission system, cable accessory is
Guarantee its critical component operated normally.However, the raising of high voltage direct current cable voltage class is but made slow progress, be on the one hand because
For opposite exchange, direct current cables will bear the effect of numerous voltages, such as voltage rating, surge voltage in operation；Separately
It on the one hand is to cause to be crosslinked with high voltage direct current because direct current cables accessory structure complexity, compact dimensions, field distribution are very uneven
Engineer application requirement is not achieved in the matching used attachment insulating Design of PE cable and dielectric level.
Electric branch phenomenon is the micron order discharge channel due to caused by shelf depreciation in insulating materials, because its shape is branch
Shape, therefore referred to as electric branch.Electric branch is mostly caused by air gap, impurity, the irregular shape etc. in insulating materials.Research shows that
The breakdown of high-tension cable rubber accessory is gradually accumulation development, and under the state of the art, electrical tree aging process is to cause punch through
The main reason for.Electric branch is difficult to measure early stage its growth since shelf depreciation is weaker, but it during the growth process can not
It is disconnected to destroy cable insulation and eventually lead to breakdown, great prestige is caused to the stabilization of the power supply even electric system of whole route
The side of body.
The development of nano material provides new approach to improve polymeric dielectric dielectric level, by being situated between in polymer
Nanoparticle is added in matter, trap level and then influence polymer various aspects performance in adjustable polymer.Nanoparticle changes
Kind polymer performance is mainly related with two aspects, is on the one hand the performance of nanoparticle itself, is on the other hand nanoparticle
With the interaction of polymer.However, inorganic nanoparticles are easy to reunite in the polymer, pass through between polymer and nano particle
The weak forces such as hydrogen bond are combined together, and are easy to cause performance deficiency, such as intensity is low, modulus is low, thermal stability is poor, these are past
It is past to limit the application of nanometer polymer.Develop the dielectric level that there is the high-performance nano material of grafting functional to improve polymer
It is a research topic very with challenge.High-tension cable is studied to be inhibited with the electrical tree aging process in ethylene propylene diene rubber attachment
Method has a very important significance the development of AC and DC cable technology.
Summary of the invention
Purpose of the invention is to overcome the shortcomings in the prior art, proposes a kind of based on POSS regulation ethylene-propylene-diene monomer
The electric branch suppressing method of glue is able to solve asking for high voltage power cable attachment ethylene propylene diene monomer (EPDM) material electric branch deterioration
Topic, provides key parameter, has a very important significance to the development of AC and DC cable technology.
The purpose of the present invention is what is be achieved through the following technical solutions.
Electric branch suppressing method based on POSS regulation ethylene propylene diene rubber of the invention, comprising the following steps:
OVPOSS nanometers are placed in 80 DEG C of baking oven and dry for 24 hours, to remove the moisture in particle by step 1；
Step 2 is opened double roll mill roller heating power supply pair roller barrel and is heated, and keeping roller temperature is about 185
DEG C, the distance between roll spacing and baffle is adjusted, appropriate ethylene propylene diene rubber is put by driving wheel one end, is taken after being kneaded 2~3min
Out, to achieve the purpose that clean double roller；
Suitable ethylene propylene diene rubber raw rubber is put by driving wheel one end, is kneaded 3min, glues rubber uniformly by step 3
Roller；OVPOSS nanometers are weighed, is added step-wise to after being divided into 3-5 parts in ethylene propylene diene rubber matrix, after it is all added
Continuing mixing 10min keeps rubber compounding uniform；1.0phr bis- 2 is weighed, 5 vulcanizing agents are added in double roll mill, are kneaded 3min
Its fully dispersed uniformly rear clot bottom sheet in ethylene propylene diene rubber is set to obtain rubber unvulcanizate；
Step 4 weighs appropriate rubber unvulcanizate, is put between two layers of PET film, and the mold of high-temperature thermo-compression formation machine is pre-
Heat is put into mold to 170 DEG C, by the PET film with rubber unvulcanizate, hot pressing 10min under conditions of 170 DEG C, 15MPa, to
Film is taken out after cooling completely；Film after molding is hung in convection oven, continues to vulcanize 4h at 200 DEG C, be changed
Ternary ethlene propyene rubbercompound material print after property；
Step 5 utilizes FTIR spectrum and the modified ethylene propylene diene rubber composite wood of scanning electron microscope analysis
Expect the functional group's composition and cross-section morphology of print；
Step 6 measures the initial probability of electric branch in modified ethylene propylene diene rubber using typical needle to board electrode；
Step 7, the life using real-time observation platform to electric branch in ethylene propylene diene rubber modified under needle to board electrode
Growth process is observed, and obtains the electric branch form and growth length feature of modified ethylene propylene diene rubber.
The forward and backward roller rotating ratio of double roll mill described in step 2 is 1:1.27, and adjusting preliminary roller revolving speed is 30r/
min。
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
(1) present invention significantly suppresses the initial probability of electric branch, the speed of growth in ethylene propylene diene rubber, improves ternary
The resistance to electric branch deterioration of EP rubbers is horizontal.
(2) OVPOSS is introduced into ethylene propylene diene rubber by chemical bond in the present invention, does not influence cable accessory ternary second
Third rubber reinforcement insulate itself insulation and mechanical performance.
(3) present invention passes through melt blending, hot-forming acquisition OVPOSS modified EPT rubber material, production technology
And simple flow, and reaction process is stably and controllable.
Detailed description of the invention
Fig. 1 is the FTIR spectrum figure of OVPOSS modified EPT rubber in the present invention；
Fig. 2 is the micro-structure diagram of OVPOSS modified EPT rubber in the present invention；
Fig. 3 is the electric branch initial probability distribution map of OVPOSS modified EPT rubber in the present invention；
Fig. 4 is the electric branch aspect graph of OVPOSS modified EPT rubber in the present invention；
Fig. 5 is the electric branch growth length figure of OVPOSS modified EPT rubber in the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawing.
Electric branch suppressing method based on POSS regulation ethylene propylene diene rubber of the invention, comprising the following steps:
OVPOSS nanometers are placed in 80 DEG C of baking oven and dry for 24 hours, to remove the moisture in particle by step 1.
Step 2 is opened double roll mill roller heating power supply pair roller barrel and is heated, and keeping roller temperature is about 185
℃.The forward and backward roller rotating ratio of the double roll mill used is 1:1.27, and adjusting preliminary roller revolving speed is 30r/min.Adjust roll spacing and
Appropriate ethylene propylene diene rubber is put by driving wheel one end, is taken out after being kneaded 2~3min, to reach cleaning by the distance between baffle
The purpose of double roller.
Suitable ethylene propylene diene rubber raw rubber is put by driving wheel one end, is kneaded 3min, glues rubber uniformly by step 3
Roller.OVPOSS nanometers are weighed, is added step-wise to after being divided into 3-5 parts in ethylene propylene diene rubber matrix, after it is all added
Continuing mixing 10min keeps rubber compounding uniform.1.0phr bis- 2 is weighed, 5 vulcanizing agents are added in double roll mill, are kneaded 3min
Its fully dispersed uniformly rear clot bottom sheet in ethylene propylene diene rubber is set to obtain rubber unvulcanizate.
Step 4 weighs appropriate rubber unvulcanizate, is put between two layers of PET film, and the mold of high-temperature thermo-compression formation machine is pre-
Heat is put into mold to 170 DEG C, by the PET film with rubber unvulcanizate, hot pressing 10min under conditions of 170 DEG C, 15MPa, to
Film is taken out after cooling completely；Film after molding is hung in convection oven, continues to vulcanize 4h at 200 DEG C, be changed
Ternary ethlene propyene rubbercompound material print after property.
Step 5 utilizes FTIR spectrum and the modified ethylene propylene diene rubber composite wood of scanning electron microscope analysis
Expect the functional group's composition and cross-section morphology of print.
Step 6 measures the initial probability of electric branch in modified ethylene propylene diene rubber using typical needle to board electrode.
Step 7, the life using real-time observation platform to electric branch in ethylene propylene diene rubber modified under needle to board electrode
Growth process is observed, and obtains the electric branch form and growth length feature of modified ethylene propylene diene rubber.
Cage-type silsesquioxane (Polyhedral Oligomeric Silsesquioxane, POSS) is one kind with inorganic
Si-O-Si key be skeleton structure, outer layer have multiple organic groups hybrid material.Its structure is similar to silica, all
It is the polyhedral structure formed by the polynary ring of silicon oxygen, but the structural regularity of POSS is stronger.POSS and silica are maximum not
It is the former with multiple organic groups with place, therefore POSS can have preferable compatibility with polymer and biosystem.
When outer layer is vinyl isoreactivity group, POSS can be introduced into polymer chain by the methods of being grafted, being copolymerized, and be gathered to improve
Close physical performance.Therefore the material that ethenyl cage model sesquialter siloxane (OVPOSS) is modified as ethylene propylene diene rubber is selected herein,
OVPOSS is introduced into ethylene propylene diene rubber matrix in the form of chemical combination key vinyl.
The three-dimensional dimension of OVPOSS molecular structure is within the scope of nanoscale, thus it is small that there is nanoparticle often to have
Dimensional effect, quantum size effect, surface and interfacial effect and macro quanta tunnel effect etc., have unique thermodynamic property,
Dielectric properties.By the way that OVPOSS is introduced into ethylene propylene diene rubber matrix, available finely dispersed OVPOSS modified three
First EP rubbers material plays the advantage of OVPOSS nano-scale.Due to the nano effect that OVPOSS is excellent, there is capture current-carrying
The characteristics of coordinated regulations electric branch channel such as son, physical barriers is developed.
By the content, the sulphur that adjust content, time, temperature and vulcanizing agent that OVPOSS is blended with ethylene propylene diene rubber
Change time etc., obtaining has different OVPOSS degrees of scatter, the ethylene propylene diene rubber modified material of graft effect, therefore obtains not
With the EPDM modified material for inhibiting electric branch degradation effects.
Embodiment one:
The electric branch suppressing method based on POSS regulation ethylene propylene diene rubber in the present invention is illustrated with reference to the accompanying drawing
How to realize.
1, OVPOSS nanometers are placed in 80 DEG C of baking oven and are dried for 24 hours, to remove the moisture in particle.
2, it opens double roll mill roller heating power supply pair roller barrel to be heated, keeping roller temperature is about 185 DEG C.It uses
Double roll mill forward and backward roller rotating ratio be 1:1.27, adjustings preliminary roller revolving speed be 30r/min.It adjusts between roll spacing and baffle
Distance, appropriate ethylene propylene diene rubber is put by driving wheel one end, is taken out after being kneaded 2~3min, to reach cleaning double roller
Purpose.
3, suitable ethylene propylene diene rubber raw rubber is put by driving wheel one end, is kneaded 3min, makes the uniform roll banding of rubber.Point
Also known as take weigh 0,1,3,5,10wt% OVPOSS nanometer, be added step-wise to ethylene-propylene-diene monomer after being respectively classified into 3-5 parts
In matrix body, continuing mixing 10min after it is all added keeps rubber compounding uniform, obtains the EPDM of different quality containing
Rubber mass.1.0phr bis- 2 is weighed, 5 vulcanizing agents are added in double roll mill, and being kneaded 3min fills it in ethylene propylene diene rubber
Clot bottom sheet obtains rubber unvulcanizate after being uniformly dispersed.
4, appropriate rubber unvulcanizate is weighed, is put between two layers of PET film, the mold of high-temperature thermo-compression formation machine is preheated to
170 DEG C, the PET film with rubber unvulcanizate is put into mold, hot pressing 10min under conditions of 170 DEG C, 15MPa, to complete
Film is taken out after cooling.Film after molding is hung in convection oven, continues to vulcanize 4h at 200 DEG C, obtains not homogeneity
Measure the modified ternary ethlene propyene rubbercompound material print of score.
5, FTIR spectrum and the modified ternary ethlene propyene rubbercompound material sample of scanning electron microscope analysis are utilized
The functional group of piece constitutes and cross-section morphology, as illustrated in fig. 1 and 2.It can be found that not seen inside the sample of 1wt% and 3wt%
It measures and is located at 1604cm-1Absorption peak illustrates to occur between OVPOSS and ethylene propylene diene rubber matrix grafting instead that is, without C=C key
It answers.It is found using the modified ethylene propylene diene rubber sample of OVPOSS that scanning electron microscope observation content is 3wt%
The size of OVPOSS is well-balanced, is uniformly dispersed, without obvious agglomeration.
6, electric branch in the different modified ethylene propylene diene rubbers of OVPOSS content is measured using typical needle to board electrode
Initial probability, as shown in Figure 3.As seen from the figure, electric branch rises in the OVPOSS that content is 3wt% modified ethylene propylene diene rubber
Beginning probability minimum 60% illustrates that the modified ethylene propylene diene rubber of the OVPOSS that content is 3wt% can effectively inhibit electric branch
Initial probability improves Power System Security And Reliability and is of great significance to the insulation life for extending HV cable accessories.
7, using real-time observation platform under needle to board electrode in the modified ethylene propylene diene rubber of difference OVPOSS content it is electric
The growth course of branch is observed, and obtains the electric branch form and growth of the modified ethylene propylene diene rubber of different OVPOSS contents
The features such as length.As shown in Figure of description 4,5.As shown in Figure 4, the OVPOSS that content is 3wt% modified ethylene-propylene-diene monomer
Electric branch damage area is obviously reduced in glue.In conjunction with Fig. 5 it is found that the ethylene propylene diene rubber that the OVPOSS that content is 3wt% is modified
The middle electric branch speed of growth is slow, and length is minimum.This illustrates the modified resistance to electricity of ethylene propylene diene rubber of the OVPOSS that content is 3wt%
Branch deteriorates ability enhancing.The present invention provides a kind of direct current cables attachment ethylene propylene diene monomer (EPDM) material electric branch insulation degradations
Suppressing method forms the initiation that electric branch can be effectively reduced in composite material by introducing OVPOSS in ethylene propylene diene monomer (EPDM) material
Probability, the speed of growth and then raising cable accessory insulating reliability.
Although function and the course of work of the invention are described above in conjunction with attached drawing, the invention is not limited to
Above-mentioned concrete function and the course of work, the above mentioned embodiment is only schematical, rather than restrictive, ability
The those of ordinary skill in domain under the inspiration of the present invention, is not departing from present inventive concept and scope of the claimed protection situation
Under, many forms can be also made, all of these belong to the protection of the present invention.
Claims (2)
1. a kind of electric branch suppressing method based on POSS regulation ethylene propylene diene rubber, which comprises the following steps:
OVPOSS nanometers are placed in 80 DEG C of baking oven and dry for 24 hours, to remove the moisture in particle by step 1；
Step 2 is opened double roll mill roller heating power supply pair roller barrel and is heated, and keeping roller temperature is about 185 DEG C, is adjusted
Appropriate ethylene propylene diene rubber is put by driving wheel one end, is taken out after being kneaded 2~3min by the distance between whole roll spacing and baffle, with
Achieve the purpose that clean double roller；
Suitable ethylene propylene diene rubber raw rubber is put by driving wheel one end, is kneaded 3min, makes the uniform roll banding of rubber by step 3；
OVPOSS nanometers are weighed, is added step-wise to after being divided into 3-5 parts in ethylene propylene diene rubber matrix, is continued after it is all added
Being kneaded 10min keeps rubber compounding uniform；1.0phr bis- 2 is weighed, 5 vulcanizing agents are added in double roll mill, and being kneaded 3min makes it
Fully dispersed uniformly rear clot bottom sheet obtains rubber unvulcanizate in ethylene propylene diene rubber；
Step 4 weighs appropriate rubber unvulcanizate, is put between two layers of PET film, and the mold of high-temperature thermo-compression formation machine is preheated to
170 DEG C, the PET film with rubber unvulcanizate is put into mold, hot pressing 10min under conditions of 170 DEG C, 15MPa, to complete
Film is taken out after cooling；Film after molding is hung in convection oven, continues to vulcanize 4h at 200 DEG C, obtain modified
Ternary ethlene propyene rubbercompound material print；
Step 5 utilizes FTIR spectrum and the modified ternary ethlene propyene rubbercompound material sample of scanning electron microscope analysis
The functional group of piece constitutes and cross-section morphology；
Step 6 measures the initial probability of electric branch in modified ethylene propylene diene rubber using typical needle to board electrode；
Step 7, the growth using real-time observation platform to electric branch in ethylene propylene diene rubber modified under needle to board electrode
Journey is observed, and obtains the electric branch form and growth length feature of modified ethylene propylene diene rubber.
2. the electric branch suppressing method according to claim 1 based on POSS regulation ethylene propylene diene rubber, which is characterized in that
The forward and backward roller rotating ratio of double roll mill described in step 2 is 1:1.27, and adjusting preliminary roller revolving speed is 30r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811069239.9A CN109294077A (en) | 2018-09-13 | 2018-09-13 | Electric branch suppressing method based on POSS regulation ethylene propylene diene rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811069239.9A CN109294077A (en) | 2018-09-13 | 2018-09-13 | Electric branch suppressing method based on POSS regulation ethylene propylene diene rubber |
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| Publication Number | Publication Date |
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| CN109294077A true CN109294077A (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811069239.9A Pending CN109294077A (en) | 2018-09-13 | 2018-09-13 | Electric branch suppressing method based on POSS regulation ethylene propylene diene rubber |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104177713A (en) * | 2014-08-26 | 2014-12-03 | 江苏斯德瑞克化工有限公司 | Preparation method of POSS (polyhedral oligomeric silsesquioxane) intercalated rectorite/rubber composite material |
| CN105419121A (en) * | 2015-12-18 | 2016-03-23 | 江苏荣昌机械制造集团有限公司 | Modified EPDM (Ethylene Propylene Diene Monomer) and preparation method thereof |
| CN108384129A (en) * | 2018-04-10 | 2018-08-10 | 湖北航天化学技术研究所 | A kind of resistance to ablation EPDM rubber insulation of polyhedral oligomeric silsesquioxane filling |
-
2018
- 2018-09-13 CN CN201811069239.9A patent/CN109294077A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104177713A (en) * | 2014-08-26 | 2014-12-03 | 江苏斯德瑞克化工有限公司 | Preparation method of POSS (polyhedral oligomeric silsesquioxane) intercalated rectorite/rubber composite material |
| CN105419121A (en) * | 2015-12-18 | 2016-03-23 | 江苏荣昌机械制造集团有限公司 | Modified EPDM (Ethylene Propylene Diene Monomer) and preparation method thereof |
| CN108384129A (en) * | 2018-04-10 | 2018-08-10 | 湖北航天化学技术研究所 | A kind of resistance to ablation EPDM rubber insulation of polyhedral oligomeric silsesquioxane filling |
Non-Patent Citations (2)
| Title |
|---|
| 杜伯学 等: "Understanding Trap Effects on Electrical Treeing Phenomena in EPDM/POSS Composites", 《SCIENTIFIC REPORTS》 * |
| 高钧驰 等: "POSS/EPDM无机-有机杂化材料", 《复合材料学报》 * |
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Application publication date: 20190201 |