CN105949394A - Preparation method of cable insulating layer material with polyolefin-grafted polar groups - Google Patents
Preparation method of cable insulating layer material with polyolefin-grafted polar groups Download PDFInfo
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- CN105949394A CN105949394A CN201610346538.7A CN201610346538A CN105949394A CN 105949394 A CN105949394 A CN 105949394A CN 201610346538 A CN201610346538 A CN 201610346538A CN 105949394 A CN105949394 A CN 105949394A
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- layer material
- polyolefin
- insulating layer
- polar group
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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
- 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
- C08F255/04—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 on to ethene-propene copolymers
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention relates to a preparation method of cable insulating layer material with polyolefin-grafted polar groups and belongs to the technical field of insulation for electrical equipment or electronic equipment. The method refers to grafting small molecules with polar groups to molecular strands of polyolefin material, thereby suppressing charge accumulation in inner space of the material under the action of direct-current electric field. The material is a recyclable insulating material capable of significantly suppressing spatial charge accumulation that is prepared by: using recyclable thermoplastic polyolefin material as a matrix and grafting polar groups to polyolefin molecular strands by melt grafting. The insulating layer material is applicable to novel recyclable direct-current cable insulating materials and the like. The insulating layer material prepared through the method has excellent spatial charge performance and high direct-current breakthrough strength and volume resistivity, is recyclable and is free of environmental destruction.
Description
Technical field
The present invention relates to the preparation method of a kind of cable insulation layer material with polyolefin graft polar group, belong to and electrically set
Standby or electronic equipment insulation technology field.
Background technology
Direct current cables technology of transmission of electricity has a lot of advantage relative to other power transmission modes, can save substantial amounts of land resource, nothing
Security of system problem, nothing cascading failure risk on a large scale.Simultaneously along with the development of distributed new generating, direct current transportation skill
Art particularly direct current cables technology of transmission of electricity will be widely adopted.
But dielectric can gather substantial amounts of space charge inside it under DC electric field effect thus affect insulant
Performance and the design of electric insulation structure.Under DC electric field effect, insulation can be caused the most many shadows by the accumulation of space charge
Ringing: (1) space charge accumulation can cause the distortion of the internal local field strength of dielectric, correlational study shows in dielectric real
The maximum electric field intensity that border exists can reach about 8 times of average electric field strength, and therefore the accumulation of space charge is easy to
Cause puncturing of dielectric；(2) space charge accumulation causes local field strength distortion that the design of electric insulation structure can be made to become
Obtaining extremely difficult, particularly the simulation calculation of insulation system internal electric field distribution will be extremely complex；(3) the depositing of space charge
Development and the generation of shelf depreciation of electric branch in dielectric will accelerated, cause the initial breakdown within dielectric, with
The existence of time space electric charge also can accelerate the ageing process of dielectric, shortens its service life；(4) accumulation of space charge
Relatively slower with evanishment, it is easy to produce local superelevation field intensity when extra electric field generation polarity inversion and causes dielectric
Puncture.Therefore suppression space charge accumulation within insulant has important theory value and practice significance.
The suppressing method of the most the most frequently used insulant space charge is introducing inorganic nanoparticles in dielectric, utilizes
The suppression space charge accumulation of its nano effect.Correlational study result shows that nano magnesia and nano alumina particles can be effective
Space charge in suppression dielectric, suppresses electrical treeing, improves breakdown strength.But it is introduced into nano-particle suppression space
The method of electric charge there is also certain limitation, mainly shows as the agglomeration traits of nano-particle.Nano-particle suppression space electricity
The premise of lotus is that nano-particle to have good dispersibility and uniformity in insulating body, has the most also drawn a series of receiving
Rice grain surface modification increases the method for itself and the polymeric matrix compatibility, but the process of surface modification adds material undoubtedly
Preparation difficulty.After once nano-particle forms bigger agglomerated particle in insulating body, the electric property of whole material
Will substantially deteriorate, breakdown strength and specific insulation can be decreased obviously.Therefore nano-particle suppression space charge accumulation is introduced
Method there is certain uncertainty, it is necessary to the method developing new suppression dielectric space charge accumulation.
Summary of the invention
The purpose of the present invention is to propose to the preparation method of a kind of cable insulation layer material with polyolefin graft polar group, logical
Cross on molecular polyolefin chain, be grafted the little molecule with polar group, thus change the energy level distribution of material internal charge trap
Reach to suppress space charge accumulation, improve electric property.
The preparation method of the cable insulation layer material with polyolefin graft polar group that the present invention proposes, the method include as
Lower step:
(1) by TPO, maleic anhydride (grafted monomers) and cumyl peroxide (initiator) with as follows
Parts by weight uniformly mix:
TPO 100 parts
Maleic anhydride 0.1～20 parts
Cumyl peroxide 0.01～5 parts
(2) mixture that above-mentioned steps (1) mixed adds in banbury, at 100～200 DEG C, rotating speed be 40～
60r/min, mixing 10～15 minutes, melt blending generation graft reaction, obtain the electricity with polyolefin graft polar group
Cable insulating layer material.
In above-mentioned preparation method, described TPO is polyethylene, polypropylene or ethylene propylene copolymer.
The preparation method of the cable insulation layer material with polyolefin graft polar group that the present invention proposes, its feature and advantage
It is: this method has the little molecule of polar group on the strand of polyolefine material by fusion-grafting, thus controlled material
Internal charge trap energy level and distribution, solve the problem of material internal space charge accumulation under suppression DC electric field effect.
The insulant prepared by the method have suppression space charge accumulation ability, improve simultaneously material breakdown strength and
Specific insulation, has excellent electric property.This method preparation process use TPO as matrix material,
Therefore can be conducive to protecting environment with recycling.Material after grafted polar group can substantially suppress space charge
Accumulation, improves breakdown strength and the specific insulation of material, has good electric property.Material prepared by the present invention, can
Should be in electronic equipment and the insulant of power equipment, particularly high-voltage DC cable insulating material.
Accompanying drawing explanation
Fig. 1 is room temperature scattergram of insulating layer material Space-charge under-60kV/mm DC electric field effect, and wherein (a) is
The distribution of space charge figure of virgin pp in prior art, (b) is the polyolefin graft by the inventive method embodiment 1 preparation
The distribution of space charge figure of polar group product.
Detailed description of the invention
The preparation method of the cable insulation layer material with polyolefin graft polar group that the present invention proposes, including walking as follows
Rapid:
(1) by TPO, maleic anhydride (grafted monomers) and cumyl peroxide (initiator) with as follows
Parts by weight uniformly mix:
TPO 100 parts
Maleic anhydride 0.1～20 parts
Cumyl peroxide 0.01～5 parts
(2) mixture that above-mentioned steps (1) mixed adds in banbury, at 100～200 DEG C, rotating speed be 40～
60r/min, mixing 10～15 minutes, melt blending generation graft reaction, obtain the electricity with polyolefin graft polar group
Cable insulating layer material.
TPO in above-mentioned preparation method, can be polyethylene, polypropylene or ethylene propylene copolymer, all of
Raw material can have been bought in general chemical shop.
This method uses melt grafting, and on the strand of thermoplastic olefin material, grafting has little point of polar group
Son, i.e. maleic anhydride, thus suppress the space charge accumulation problems of material internal under DC electric field effect.
Technical scheme will be described in more details by the present invention by the following specific embodiments, but the present invention not office
It is limited to case study on implementation proposed below.
Embodiment 1:
(1) 50 grams of polypropylene, 1.5 grams of maleic anhydrides, 0.1 gram of cumyl peroxide are uniformly mixed；
(2) mixing step (1) mixed adds in banbury, and at 200 DEG C, rotating speed is 60r/min, and mixing 10
Minute, melt blending generation graft reaction, obtain the cable insulation layer material with polyolefin graft polar group.This has
Volume resistance under the cable insulation layer material of polyolefin graft polar group dc breakdown intensity at normal temperatures, 20kV/mm
Relative dielectric constant under rate, 50Hz, dielectric loss such as following table.
The cable insulation layer material of polyolefin graft polar group prepared by the above embodiment of the present invention, its dc breakdown intensity phase
Nearly 14% is improve for the polypropylene before grafting, has reached 453kV/mm.Direct current specific insulation is relative to grafting
Before be also obviously improved.Its relative dielectric constant and dielectric loss angle tangent slightly rise, but have no effect on its electric property.
Simultaneously from Fig. 1 (b) it can be seen that the cable insulation layer material Space-charge accumulation of polyolefin graft polar group is considerably less,
Show good space charge rejection ability.In general, the cable insulation layer material table of polyolefin graft polar group
Reveal excellent electric property, be a kind of recyclable insulant with superior electrical performance, can be applicable to include direct current
Cable, ac cable insulate in interior multiple insulation situations.
Embodiment 2:
(1) 50 grams of polypropylene, 0.5 gram of maleic anhydride, 0.005 gram of cumyl peroxide are uniformly mixed；
(2) mixture step (1) mixed adds in banbury, and at 150 DEG C, rotating speed is 40r/min, mixing
12 minutes, melt blending generation graft reaction, obtain the cable insulation layer material of polyolefin graft polar group.
Embodiment 3:
(1) 50 grams of polypropylene, 6 grams of maleic anhydrides, 1 gram of cumyl peroxide are uniformly mixed；
(2) mixture step (1) mixed adds in banbury, and at 170 DEG C, rotating speed is 50r/min, mixing
15 minutes, melt blending generation graft reaction, obtain the cable insulation layer material of polyolefin graft polar group.
Embodiment 4:
(1) 50 grams of polypropylene, 10 grams of maleic anhydrides, 2.5 grams of cumyl peroxides are uniformly mixed；
(2) mixture step (1) mixed adds in banbury, and at 170 DEG C, rotating speed is 50r/min, mixing
13 minutes, melt blending generation graft reaction, obtain the cable insulation layer material of polyolefin graft polar group.
Embodiment 5:
(1) 50 grams of ethylene propylene copolymers, 2 grams of maleic anhydrides, 0.01 gram of cumyl peroxide are uniformly mixed；
(2) mixture step (1) mixed adds in banbury, and at 150 DEG C, rotating speed is 40r/min, mixing
10 minutes, melt blending generation graft reaction, obtain the cable insulation layer material of polyolefin graft polar group.
Embodiment 6:
(1) 50 grams of ethylene propylene copolymers, 4 grams of maleic anhydrides, 0.5 gram of cumyl peroxide are uniformly mixed；
(2) mixture step (1) mixed adds in banbury, and at 170 DEG C, rotating speed is 50r/min, mixing
12 minutes, melt blending generation graft reaction, obtain the cable insulation layer material of polyolefin graft polar group.
Embodiment 7:
(1) 50 grams of ethylene propylene copolymers, 8 grams of maleic anhydrides, 2 grams of cumyl peroxides are uniformly mixed；
(2) mixture step (1) mixed adds in banbury, and at 130 DEG C, rotating speed is 60r/min, mixing
15 minutes, melt blending generation graft reaction, obtain the cable insulation layer material of polyolefin graft polar group.
Embodiment 8:
(1) 50 grams of polyethylene, 1 gram of maleic anhydride, 0.05 gram of cumyl peroxide are uniformly mixed；
(2) mixture step (1) mixed adds in banbury, and at 130 DEG C, rotating speed is 50r/min, mixing
12 minutes, melt blending generation graft reaction, obtain the cable insulation layer material of polyolefin graft polar group.
Embodiment 9:
(1) 50 grams of polyethylene, 5 grams of maleic anhydrides, 1.5 grams of cumyl peroxides are uniformly mixed；
(2) mixture step (1) mixed adds in banbury, and at 100 DEG C, rotating speed is 40r/min, mixing
15 minutes, melt blending generation graft reaction, obtain the cable insulation layer material of polyolefin graft polar group.
Embodiment 10:
(1) 50 grams of polyethylene, 10 grams of maleic anhydrides, 2.5 grams of cumyl peroxides are uniformly mixed；
(2) mixture step (1) mixed adds in banbury, and at 140 DEG C, rotating speed is 60r/min, mixing
10 minutes, melt blending generation graft reaction, obtain the cable insulation layer material of polyolefin graft polar group.
Description of the invention accompanying drawing 1 gives polypropylene distribution of space charge before and after grafted polar group, and test uses arteries and veins
Rush radio-acoustic method and carry out after the match at the applying direct current of-60kV/mm.It will be seen that along with the making alive time from Fig. 1 (a)
Increase, constantly have the negative charge of same polarity to inject near negative electrode, cause the accumulation of serious space charge, this space
Charge buildup can have a strong impact on the insulating properties of material.As shown in Fig. 1 (b), by gathering of the inventive method embodiment 1 preparation
It will be seen that after grafted polar group in the distribution of space charge figure of alkene grafted polar group product, in polypropylene
Space charge accumulation has obtained obvious suppression.Along with the increase of making alive time, inject almost without obvious space charge,
This will be greatly improved dc breakdown intensity and the insulation life of material.
Claims (2)
1. the preparation method of a cable insulation layer material with polyolefin graft polar group, it is characterised in that the party
Method comprises the steps:
(1) TPO, maleic anhydride and cumyl peroxide are uniformly mixed with following parts by weight:
TPO 100 parts
Maleic anhydride 0.1～20 parts
Cumyl peroxide 0.01～5 parts
(2) mixture that above-mentioned steps (1) mixed adds in banbury, at 100～200 DEG C, rotating speed be 40～
60r/min, mixing 10～15 minutes, melt blending generation graft reaction, obtain the electricity with polyolefin graft polar group
Cable insulating layer material.
2. preparation method as claimed in claim 1, it is characterised in that described TPO is polyethylene, gathers
Propylene or ethylene propylene copolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610346538.7A CN105949394A (en) | 2016-05-24 | 2016-05-24 | Preparation method of cable insulating layer material with polyolefin-grafted polar groups |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610346538.7A CN105949394A (en) | 2016-05-24 | 2016-05-24 | Preparation method of cable insulating layer material with polyolefin-grafted polar groups |
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| CN105949394A true CN105949394A (en) | 2016-09-21 |
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| CN201610346538.7A Pending CN105949394A (en) | 2016-05-24 | 2016-05-24 | Preparation method of cable insulating layer material with polyolefin-grafted polar groups |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393572A (en) * | 2020-02-05 | 2020-07-10 | 哈尔滨理工大学 | Recyclable antioxidant grafted polyolefin high-voltage direct-current cable insulating material and preparation method thereof |
| WO2023011515A1 (en) | 2021-08-04 | 2023-02-09 | 中国石油化工股份有限公司 | Flexible polypropylene modified insulation material, preparation method therefor, and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445627A (en) * | 2008-12-11 | 2009-06-03 | 上海交通大学 | High-voltage DC cable insulating material and a preparation method thereof |
| CN102532637A (en) * | 2010-12-10 | 2012-07-04 | 浙江万马高分子材料股份有限公司 | Insulating material for high-voltage direct-current feeder cable |
| CN103289278A (en) * | 2012-02-23 | 2013-09-11 | 苏州井上高分子新材料有限公司 | Modified polyolefin cable material achieving controllable grafting ratio |
| CN105542290A (en) * | 2016-03-09 | 2016-05-04 | 江苏江扬船用电缆有限公司 | Formula and preparation method of high-voltage direct current cable material with function of inhibiting space charge |
-
2016
- 2016-05-24 CN CN201610346538.7A patent/CN105949394A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445627A (en) * | 2008-12-11 | 2009-06-03 | 上海交通大学 | High-voltage DC cable insulating material and a preparation method thereof |
| CN102532637A (en) * | 2010-12-10 | 2012-07-04 | 浙江万马高分子材料股份有限公司 | Insulating material for high-voltage direct-current feeder cable |
| CN103289278A (en) * | 2012-02-23 | 2013-09-11 | 苏州井上高分子新材料有限公司 | Modified polyolefin cable material achieving controllable grafting ratio |
| CN105542290A (en) * | 2016-03-09 | 2016-05-04 | 江苏江扬船用电缆有限公司 | Formula and preparation method of high-voltage direct current cable material with function of inhibiting space charge |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393572A (en) * | 2020-02-05 | 2020-07-10 | 哈尔滨理工大学 | Recyclable antioxidant grafted polyolefin high-voltage direct-current cable insulating material and preparation method thereof |
| CN111393572B (en) * | 2020-02-05 | 2022-06-21 | 哈尔滨理工大学 | Recyclable antioxidant grafted polyolefin high-voltage direct-current cable insulation material and preparation method thereof |
| WO2023011515A1 (en) | 2021-08-04 | 2023-02-09 | 中国石油化工股份有限公司 | Flexible polypropylene modified insulation material, preparation method therefor, and application thereof |
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Application publication date: 20160921 |
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