CN109880239A - A kind of non-linear ternary ethlene propyene rubbercompound material and preparation method thereof - Google Patents
A kind of non-linear ternary ethlene propyene rubbercompound material and preparation method thereof Download PDFInfo
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Abstract
The present invention discloses a kind of non-linear ternary ethlene propyene rubbercompound material, it is made of the raw material of following composition by weight: 100 parts of ethylene propylene diene rubber, 50 ~ 100 parts of silicon carbide, 1 ~ 5 part of zinc oxide, 0.5 ~ 1.5 part of stearic acid, 10 ~ 15 parts of paraffin oil, anti-aging agent 2,2,4- trimethyl -1,0.5 ~ 1.5 part of 2- dihydroquinoline polymer, 2 ~ 3 parts of crosslinking agent, 0.5 ~ 2 part of assistant crosslinking agent Triallyl isocyanurate (TAIC).Composite material of the invention may be used as prefabricated high-voltage direct-current cable accessory insulating materials, using composite material resistance rate to the dependence of electric field, the case where realizing the Auto-matching of resistivity and electric field level, and then can improve non-uniform electric.
Description
Technical field
The present invention relates to power transmission cable accessories technical field, especially a kind of non-linear ternary ethlene propyene rubbercompound material and
Preparation method.
Background technique
There are interfaces between prefabricated high-voltage direct-current cable accessory insulating materials and cable insulation, belong to typical double-layer electric
Medium composite insulation structure.It is uneven to there is complicated electrical problems, especially field distribution in direct current cables accessory internal.Direct current
Field distribution inside cable fittings depends on the resistivity of medium, and attachment insulating materials and cable insulation material resistivity mismatch
It will lead to direct current cables accessory internal non-uniform electric, and then the aging that dielectric will be accelerated, it is exhausted to reduce cable accessory
Edge performance, so that direct current cables attachment becomes the exhausted weak link in direct current cables system and the typical parts of failure, danger
And the security reliability of direct current cables system operation.
Summary of the invention
It is an object of the present invention to provide a kind of non-linear ternary ethlene propyene rubbercompound material and preparation method thereof, for use as
Prefabricated high-voltage direct-current cable accessory insulating materials, and then resistance is realized to the dependence of electric field using composite material resistance rate
The case where Auto-matching of rate and electric field level, improvement non-uniform electric.
The technical scheme adopted by the invention is as follows: a kind of non-linear ternary ethlene propyene rubbercompound material, by following composition by weight
Raw material be made: 100 parts of ethylene propylene diene rubber, 50 ~ 100 parts of silicon carbide, 1 ~ 5 part of zinc oxide, 0.5 ~ 1.5 part of stearic acid, paraffin
10 ~ 15 parts of oil, anti-aging agent 2,2,0.5 ~ 1.5 part of polymer of 4- trimethyl -1,2- dihydroquinoline, 2 ~ 3 parts of crosslinking agent, assistant crosslinking agent
0.5 ~ 2 part of Triallyl isocyanurate (TAIC).
Preferably, 125 DEG C of the Mooney viscosity ML 1+4 of the ethylene propylene diene rubber are 20 ~ 30；Second in ethylene propylene diene rubber
Alkene content is 50 ~ 70%, and third monomer ENB content is 5 ~ 8%；The percentage is mass percent.
Preferably, the silicon carbide is cubic, and particle size range is 1 ~ 10 μm, and purity is greater than 99.9%, specific surface area
Greater than 3.2 m2/ g, bulk density is less than 1.52 g/cm3；The percentage is mass percent.
Preferably, the oxidisability mean particle size of the zinc oxide is 40 ~ 100nm, and specific surface area is greater than 50m2/ g, heap
Product 0.3 ~ 0.45 g/cm of density3。
The stearic purity is greater than 98%, and fusing point is 69 ~ 72 DEG C.The viscosity of the paraffin oil is 300 ~ 500 mm2/
S, flash-point are greater than 300 DEG C, 0.8 ~ 1.0 g/cm of density3.The anti-aging agent 2,2,4 trimethyl 1,2 dihydroquinoline polymer
Density is 1.08 g/cm3, fusing point is 72 ~ 94 DEG C.The percentage is mass percent.
Preferably, the crosslinking agent is cumyl peroxide and 2, in 5- dimethyl -2,5 (t-butyl peroxy) hexane
It is a kind of.Further, if selecting cumyl peroxide, processed safely temperature is greater than 130 DEG C, and typical crosslinking temperature is 170 DEG C；
If selecting 2,5- dimethyl -2,5 (t-butyl peroxy) hexane, processed safely temperature is greater than 135 DEG C, and typical crosslinking temperature is 175
℃。
The density of the assistant crosslinking agent Triallyl isocyanurate (TAIC) is 1.1 ~ 1.2 g/cm3, fusing point 26 ~ 28
℃。
Preferably, the non-linear ternary ethlene propyene rubbercompound material of the present invention is made of the raw material of following composition by weight: ternary
100 parts of EP rubbers, 60 parts of silicon carbide, 5 parts of zinc oxide, 1 part of stearic acid, 10 parts of paraffin oil, anti-aging agent 2,2, trimethyl -1 4-,
1.5 parts of 2- dihydroquinoline polymer, 2.5 parts of hexane of 2,5- dimethyl -2,5 (t-butyl peroxy), assistant crosslinking agent triallyl is different
0.5 part of cyanurate (TAIC).
Invention additionally discloses a kind of preparation methods of above-mentioned non-linear ternary ethlene propyene rubbercompound material, comprising:
Ethylene propylene diene rubber, silicon carbide and the zinc oxide in raw material is dried in S1；
Ethylene propylene diene rubber after drying process is kneaded setting duration by S2 at the temperature of setting and revolving speed；
Silicon carbide, zinc oxide, stearic acid, paraffin oil and anti-aging agent in raw material is put into kneading chamber, when being kneaded the second setting by S3
It is long；
Crosslinking agent and assistant crosslinking agent investment kneading chamber in raw material is kneaded third and sets duration, obtain semi-finished rubber by S4；
S5, using open mill in the case where setting operating temperature, logical setting number thin to semi-finished rubber；
S6 expands the double roller distance of open mill, to bottom sheet after the 4th setting duration of semi-finished rubber mixing of Bao Tonghou, obtains not
Vulcanized rubber；
S7 vulcanizes the half finished rubber being placed in sampling die using vulcanizing press under the operating temperature of setting,
Then it cools down, obtains composite sample；
Composite sample is placed in convection oven and handles, to eliminate cross-linking by-products produced during the preparation process by S8.
Preferably, ethylene propylene diene rubber, silicon carbide and the zinc oxide in raw material are placed in 70 DEG C of drying box processing 12 by S1
H, to remove the moisture in material.
Preferably, in S2, the set temperature is 120 DEG C, and setting speed is 30 turns/min, when setting a length of 2 min；Three
Before first EP rubbers investment, mixer is preheated into 10 min at 120 DEG C；
In S3, described second a length of 15min when setting；In S4, the third a length of 3min when setting.Each setting duration can small model
Enclose adjustment.
Preferably, in S5, the open mill sets operating temperature as 45 DEG C, and thin logical number is 10 times；Pair of open mill
From for 1 mm, revolving speed is 30 turns/min for roll spacing, and front and back rod cylinder rotating ratio is 1:1.2；
In S6, expanding the double rod distances of open mill is 6 mm, is kneaded bottom sheet after 2 min, obtains half finished rubber.
Preferably, in S7, the operating temperature of vulcanizing press is set as 175 DEG C, vulcanizes 15min under sample 20MPa pressure,
Then cool to room temperature taking-up sample.
Preferably, in S8, composite sample is placed in convection oven, handles 12h at 90 DEG C to get non-linear three
First EP rubbers composite material.
Beneficial effect
Using composite material resistance rate, to the dependence of electric field, non-linear ternary ethlene propyene rubbercompound material is made in the present invention, can
Prefabricated high-voltage direct-current cable accessory insulating materials as power line cables, and can be realized resistivity and power plant's size
Auto-matching.Under existing fringing field effect, Nonlinear Composite still maintains very high resistivity, is equivalent to insulating materials, material
The leakage current of material is relatively small.Under high electric field effect, lower resistivity is presented in Nonlinear Composite, can be to electric field
Effective modulating action is played in distribution, and field distribution is more uneven, and composite material is more significant to the inhibitory effect of high electric field.
Test proves, with the raising of electric field strength, the volume resistivity of composite material of the invention is in non-linear decline,
Electric field strength is higher, and decrease speed is faster, and the Auto-matching of volume resistivity and electric field level can be realized, and reaches improvement direct current
The effect of cable accessory field distribution uniformity, improves the dielectric strength of high-voltage direct-current cable accessory.
Detailed description of the invention
Fig. 1 show SiC microstructure schematic diagram (1 ~ 10 μm of particle size range)；
Fig. 2 show the volume resistivity and electric field strength relation schematic diagram of composite material of the present invention.
Specific embodiment
It is further described below in conjunction with the drawings and specific embodiments.
Embodiment 1
A kind of non-linear ternary ethlene propyene rubbercompound material, is made of the raw material of following composition by weight: ethylene propylene diene rubber 100
Part, 50 parts of silicon carbide, 5 parts of zinc oxide, 1 part of stearic acid, 10 parts of paraffin oil, anti-aging agent 2,2,4- trimethyl -1,2- dihydroquinoline
1.5 parts of polymer, 2.5 parts of crosslinking agent, 0.5 part of assistant crosslinking agent Triallyl isocyanurate (TAIC).
125 DEG C of Mooney viscosity ML 1+4 of ethylene propylene diene rubber are 20 ~ 30；Ethylene contents are in ethylene propylene diene rubber
50%, third monomer ENB content is 6%；The percentage is mass percent.
Silicon carbide is cubic, and particle size range is 1 ~ 10 μm, and purity is greater than 99.9%, and specific surface area is greater than 3.2 m2/
G, bulk density is less than 1.52 g/cm3；The percentage is mass percent.
The oxidisability mean particle size of zinc oxide is 40 ~ 100nm, and specific surface area is greater than 50m2/ g, bulk density 0.3 ~
0.45 g/cm3。
Stearic purity is greater than 98%, and fusing point is 69 ~ 72 DEG C.The viscosity of the paraffin oil is 300 ~ 500 mm2/ s dodges
Point is greater than 300 DEG C, 0.8 ~ 1.0 g/cm of density3.The density of the anti-aging agent 2,2,4 trimethyl 1,2 dihydroquinoline polymer
For 1.08 g/cm3, fusing point is 72 ~ 94 DEG C.The percentage is mass percent.
Crosslinking agent is one of 2,5- dimethyl -2,5 (t-butyl peroxy) hexane, and processed safely temperature is greater than 130
DEG C, typical crosslinking temperature is 170 DEG C.The density of assistant crosslinking agent Triallyl isocyanurate (TAIC) is 1.1 ~ 1.2 g/cm3,
26 ~ 28 DEG C of fusing point.
Embodiment 2
Non-linear ternary ethlene propyene rubbercompound material is made of the raw material of following composition by weight: 100 parts of ethylene propylene diene rubber, carbon
60 parts of SiClx, 5 parts of zinc oxide, 1.5 parts of stearic acid, 13 parts of paraffin oil, anti-aging agent 2,2, the polymerization of 4- trimethyl -1,2- dihydroquinoline
1.5 parts of object, 2.5 parts of crosslinking agent, 1.5 parts of assistant crosslinking agent Triallyl isocyanurate (TAIC).
Ethylene contents are 70% in ethylene propylene diene rubber, and third monomer ENB content is 5%；The percentage is quality hundred
Divide ratio.
Crosslinking agent is cumyl peroxide, and processed safely temperature is greater than 135 DEG C, and typical crosslinking temperature is 175 DEG C.
Embodiment 3
Non-linear ternary ethlene propyene rubbercompound material is made of the raw material of following composition by weight: 100 parts of ethylene propylene diene rubber, carbon
80 parts of SiClx, 3 parts of zinc oxide, 1.3 parts of stearic acid, 15 parts of paraffin oil, anti-aging agent 2,2, the polymerization of 4- trimethyl -1,2- dihydroquinoline
1.2 parts of object, 2 parts of crosslinking agent, 2 parts of assistant crosslinking agent Triallyl isocyanurate (TAIC).
Ethylene contents are 60% in ethylene propylene diene rubber, and third monomer ENB content is 8%；The percentage is quality hundred
Divide ratio.
Crosslinking agent is 2,5- dimethyl -2,5 (t-butyl peroxy).
Embodiment 4
Non-linear ternary ethlene propyene rubbercompound material is made of the raw material of following composition by weight: 100 parts of ethylene propylene diene rubber, carbon
100 parts of SiClx, 1 part of zinc oxide, 0.5 part of stearic acid, 10 parts of paraffin oil, anti-aging agent 2,2,4- trimethyl -1,2- dihydroquinoline is gathered
0.5 part of object of conjunction, 3 parts of crosslinking agent, 0.5 part of assistant crosslinking agent Triallyl isocyanurate (TAIC).
Ethylene contents are 58% in ethylene propylene diene rubber, and third monomer ENB content is 8%；The percentage is quality hundred
Divide ratio.
Crosslinking agent is 2,5- dimethyl -2,5 (t-butyl peroxy) hexane.
Embodiment 5
A kind of preparation method of non-linear ternary ethlene propyene rubbercompound material described in embodiment 1, comprising:
Ethylene propylene diene rubber EPDM, silicon carbide SiC and zinc oxide ZnO in raw material is placed in 70 DEG C of drying box processing 12 by S1
H removes the moisture in material；
Mixer is preheated 10 min by S2 at 120 DEG C, and adjusting closed-smelting machine rotor revolving speed is 30 turns/min, puts into 100 parts of dryings
Treated EPDM is kneaded 2 min to kneading chamber；
S3 successively puts into 50 parts of SiC, 5 parts of ZnO, 1 part of stearic acid, 10 parts of paraffin oils and 1.5 parts of anti-aging agents to kneading chamber and is kneaded 15
min；
S4 puts into 2.5 parts of 2,5- dimethyl -2,5 (t-butyl peroxy) hexanes and 0.5 part of assistant crosslinking agent triallyl to kneading chamber
Isocyanuric acid ester is kneaded 3min, obtains semi-finished rubber；
Open mill temperature is set as 45 DEG C by S5, and adjusting double rod distances is 1 mm, and revolving speed is 30 turns/min, front and back rod cylinder revolving speed
Than semi-finished rubber being put on a mill, Bao Tong 10 times for 1:1.2；
S6 expands and adjusts the double rods of open mill apart from being 6 mm, is kneaded bottom sheet after 2 min, obtains half finished rubber；
The temperature of vulcanizing press is set as 175 DEG C, then half finished rubber is placed in sampling die, sample is in temperature by S7
Under 175 DEG C of degree, pressure 20MPa, vulcanizes 15min, then cool to room temperature taking-up and obtain composite sample；
Composite sample is put into convection oven by S8, handles 12h at 90 DEG C, eliminates crosslinking produced during the preparation process
By-product, both non-linear ternary ethlene propyene rubbercompound material finished product.
Reference implementation example 5, the preparation method of embodiment 2-4 need to only adjust raw material components ratio.
Compliance test result
5 method of embodiment is utilized to prepare resulting non-linear ethylene propylene diene rubber embodiment 1-4 and more embodiments compound
Material carries out volume resistivity measurement using resistivity measurement device, and test result is refering to what is shown in Fig. 2, each curve respectively corresponds
The silicon carbide constituent content of one embodiment in 2-4, each embodiment is followed successively by 50,60,80,100.
As seen from the figure, under existing fringing field effect, Nonlinear Composite still maintains very high resistivity, is equivalent to insulation
The leakage current of material, material is relatively small；Under high electric field effect, lower resistivity is presented in Nonlinear Composite, this
Sample can play effective modulating action to field distribution, and field distribution is more uneven, suppression of the composite material to high electric field
Effect processed is more significant.I.e. with the raising of electric field strength, the volume resistivity of composite material is in non-linear decline, and electric field strength
Higher decrease speed it is faster, it can be achieved that volume resistivity and electric field level Auto-matching, reach improve direct current cables attachment electricity
The effect of field distribution uniformity improves the dielectric strength of high-voltage direct-current cable accessory.
Meanwhile with the increase of SiC content, composite material volume resistivity downward trend is rapider.Using above-mentioned rule,
The regulation to composite material volume resistivity can be realized, to reach cable insulation by adjusting SiC content in practical applications
The insulating materials of attachment and the different matched purposes of direct current cables insulating materials resistivity.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of non-linear ternary ethlene propyene rubbercompound material, characterized in that be made of the raw material of following composition by weight: ternary second
Third 100 parts of rubber, 50 ~ 100 parts of silicon carbide, 1 ~ 5 part of zinc oxide, 0.5 ~ 1.5 part of stearic acid, 10 ~ 15 parts of paraffin oil, anti-aging agent 2,
2,4- 0.5 ~ 1.5 part of trimethyl -1,2- dihydroquinoline polymer, 2 ~ 3 parts of crosslinking agent, assistant crosslinking agent Triallyl isocyanurate
(TAIC) 0.5 ~ 2 part.
2. non-linear ternary ethlene propyene rubbercompound material according to claim 1, characterized in that the ethylene-propylene-diene monomer
125 DEG C of Mooney viscosity ML 1+4 of glue are 20 ~ 30；Ethylene contents are 50 ~ 70% in ethylene propylene diene rubber, and third monomer ENB contains
Amount is 5 ~ 8%；The percentage is mass percent.
3. non-linear ternary ethlene propyene rubbercompound material according to claim 1, characterized in that the silicon carbide is vertical
Prismatic crystal type, particle size range are 1 ~ 10 μm, and purity is greater than 99.9%, and specific surface area is greater than 3.2 m2/ g, bulk density is less than 1.52
g/cm3；The percentage is mass percent.
4. non-linear ternary ethlene propyene rubbercompound material according to claim 1, characterized in that the oxygen of the zinc oxide
The property changed mean particle size is 40nm, and specific surface area is greater than 50m2/ g, 0.3 ~ 0.45 g/cm of bulk density3；
The stearic purity is greater than 98%, and fusing point is 69 ~ 72 DEG C；
The viscosity of the paraffin oil is 300 ~ 500 mm2/ s, flash-point are greater than 300 DEG C, 0.8 ~ 1.0 g/cm of density3；
The density of the anti-aging agent 2,2,4 trimethyl 1,2 dihydroquinoline polymer is 1.08 g/cm3, fusing point is 72 ~ 94 DEG C；
The density of the assistant crosslinking agent Triallyl isocyanurate (TAIC) is 1.1 ~ 1.2 g/cm3, 26 ~ 28 DEG C of fusing point；Described hundred
Divide than being mass percent.
5. non-linear ternary ethlene propyene rubbercompound material according to claim 1, characterized in that the crosslinking agent is peroxide
Change one of diisopropylbenzene (DIPB) and 2,5- dimethyl -2,5 (t-butyl peroxy) hexane.
6. non-linear ternary ethlene propyene rubbercompound material according to claim 1, characterized in that non-linear ethylene-propylene-diene monomer
Glue composite material is made of the raw material of following composition by weight: 100 parts of ethylene propylene diene rubber, 60 parts of silicon carbide, and 5 parts of zinc oxide, firmly
1 part of resin acid, 10 parts of paraffin oil, anti-aging agent 2,2,1.5 parts of polymer of 4- trimethyl -1,2- dihydroquinoline, 2,5- dimethyl -2,5
2.5 parts of (t-butyl peroxy) hexane, 0.5 part of assistant crosslinking agent Triallyl isocyanurate (TAIC).
7. a kind of preparation method of above-mentioned non-linear ternary ethlene propyene rubbercompound material, characterized in that include:
Ethylene propylene diene rubber, silicon carbide and the zinc oxide in raw material is dried in S1；
Ethylene propylene diene rubber after drying process is kneaded setting duration by S2 at the temperature of setting and revolving speed；
Silicon carbide, zinc oxide, stearic acid, paraffin oil and anti-aging agent in raw material is put into kneading chamber, when being kneaded the second setting by S3
It is long；
Crosslinking agent and assistant crosslinking agent investment kneading chamber in raw material is kneaded third and sets duration, obtain semi-finished rubber by S4；
S5, using open mill in the case where setting operating temperature, logical setting number thin to semi-finished rubber；
S6 expands the double roller distance of open mill, to bottom sheet after the 4th setting duration of semi-finished rubber mixing of Bao Tonghou, obtains not
Vulcanized rubber；
S7 vulcanizes the half finished rubber being placed in sampling die using vulcanizing press under the operating temperature of setting,
Then it cools down, obtains composite sample；
Composite sample is placed in convection oven and handles, to eliminate cross-linking by-products produced during the preparation process by S8.
8. according to the method described in claim 7, it is characterized in that, S1 is by ethylene propylene diene rubber, silicon carbide and the oxidation in raw material
The drying box that zinc is placed in 70 DEG C handles 12 h, to remove the moisture in material；
In S2, the set temperature is 120 DEG C, and setting speed is 30 turns/min, when setting a length of 2 min；Ethylene propylene diene rubber
Before investment, mixer is preheated into 10 min at 120 DEG C；
In S3, described second a length of 15min when setting；In S4, the third a length of 3min when setting.
9. according to the method described in claim 7, it is characterized in that, in S5, the open mill sets operating temperature as 45 DEG C,
Thin logical number is 10 times；The double roller distance of open mill is 1 mm, and revolving speed is 30 turns/min, and front and back rod cylinder rotating ratio is 1:1.2；
In S6, expanding the double rod distances of open mill is 6 mm, is kneaded bottom sheet after 2 min, obtains half finished rubber；
In S7, the operating temperature of vulcanizing press is set as 175 DEG C, vulcanizes 15min under sample 20MPa pressure, is subsequently cooled to
Room temperature takes out sample.
10. according to the method described in claim 7, it is characterized in that, in S8, composite sample is placed in convection oven,
12h is handled at 90 DEG C to get non-linear ternary ethlene propyene rubbercompound material.
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Application publication date: 20190614 |
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