CN117417595A - Temperature-resistant cable and modified polypropylene cable protective sleeve material - Google Patents
Temperature-resistant cable and modified polypropylene cable protective sleeve material Download PDFInfo
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- CN117417595A CN117417595A CN202311179940.7A CN202311179940A CN117417595A CN 117417595 A CN117417595 A CN 117417595A CN 202311179940 A CN202311179940 A CN 202311179940A CN 117417595 A CN117417595 A CN 117417595A
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- -1 polypropylene Polymers 0.000 title claims abstract description 85
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 63
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 title claims abstract description 48
- 230000001681 protective effect Effects 0.000 title claims abstract description 35
- 229920001709 polysilazane Polymers 0.000 claims abstract description 57
- 238000002156 mixing Methods 0.000 claims abstract description 32
- 238000002360 preparation method Methods 0.000 claims abstract description 20
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000005662 Paraffin oil Substances 0.000 claims abstract description 17
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 17
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 17
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 17
- KXFSUVJPEQYUGN-UHFFFAOYSA-N trimethyl(phenyl)silane Chemical compound C[Si](C)(C)C1=CC=CC=C1 KXFSUVJPEQYUGN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 101100352425 Pithecopus hypochondrialis psn2 gene Proteins 0.000 claims abstract description 16
- 238000003723 Smelting Methods 0.000 claims abstract description 8
- 239000010696 ester oil Substances 0.000 claims abstract description 5
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 239000012948 isocyanate Substances 0.000 claims description 50
- 150000002513 isocyanates Chemical class 0.000 claims description 50
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 35
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 10
- 239000000806 elastomer Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 8
- 208000005156 Dehydration Diseases 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 230000002829 reductive effect Effects 0.000 claims description 6
- 239000007795 chemical reaction product Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 5
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical class C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 abstract description 7
- 230000008018 melting Effects 0.000 abstract description 7
- 230000009477 glass transition Effects 0.000 abstract description 3
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 9
- 239000011241 protective layer Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 3
- 229910007991 Si-N Inorganic materials 0.000 description 2
- 229910006294 Si—N Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 150000001408 amides Chemical group 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920000428 triblock copolymer Polymers 0.000 description 1
Classifications
-
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- 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
- H01B3/441—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 from alkenes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
Abstract
The preparation method of the blending modified polypropylene cable protective sleeve material comprises the steps of mixing polypropylene, DCP, POE, SEBS, modified polysilazane, an emulsifier, a reinforcing agent, phenyl trimethyl silane, aluminum hydroxide, dioctyl ester and paraffin oil, carrying out ultrasonic vibration, and then smelting and extrusion molding, wherein the modified polysilazane is prepared by adopting polysilazane (PSN 2) and 4,4' -dicyclohexylmethane diisocyanate (HMDI) to react. The blended modified polypropylene cable protective sleeve prepared by the invention has high melting point and low glass transition temperature which reach 260 ℃ and minus 36 ℃ respectively, and has high temperature resistance and high temperature resistanceThe low temperature capability, the insulativity and the mechanical property are obviously improved, and the dielectric constant reaches 2.74C 2 /(N·M 2 ) The breaking strength is 59MPa, and the breaking elongation reaches 492%.
Description
Technical Field
The invention relates to the technical field of cable materials, in particular to a modified polypropylene cable protective sleeve material and a temperature-resistant cable.
Background
The electric wires and cables generally appear in different application fields in our daily life, and from the viewpoint of use, the electric wires and cables can be divided into power cables, telephone cables, automobile wires, mining cables and the like, and the simple electric wires are formed by only one bundle of copper wires and one insulating layer. With market segments, specialty cables, such as shipping, underground, underwater, aerospace and other high performance cables, have evolved. Such cables are not simple metals plus single-layer insulation, but have at least a double-layer structure with different characteristics, and are divided into insulation materials (thermal conductivity and insulation) and sheathing materials (protective layers). And the polypropylene cable material mainly provides proper performance for insulation of a certain limit heat-resistant cable.
The common polyethylene cable needs a polypropylene cable when the working temperature is lower than 85 ℃ and higher than 85 ℃, but the hardness of the polypropylene material is high, and the bending modulus of the material needs to be reduced to meet the manufacturing process requirement of the cable protective sheath material, so that the polypropylene and the elastomer are blended and modified in the prior art, so that the melting temperature of the material is improved, and the rigidity of the material is reduced.
Disclosure of Invention
The invention aims to provide a temperature-resistant cable taking a blending modified polypropylene cable protective sleeve material as a protective layer.
The invention also aims to provide the blending modified polypropylene cable protective sleeve material.
The third aim of the invention is to provide a preparation method of the blending modified polypropylene cable protective sleeve material. Through blending modification, the high temperature resistance and the low temperature resistance, the insulativity and the mechanical property of the material are improved.
The invention aims at realizing the following technical scheme:
the utility model provides a heat-resistant cable, includes conductive core, insulating layer and protective layer from inside to outside in proper order, its characterized in that: the protective layer is a modified polypropylene cable protective sleeve material, and is prepared by mixing polypropylene, dicumyl peroxide, ethylene-octene tool elastomer (POE), hydrogenated styrene-butadiene-styrene block copolymer (SEBS), isocyanate modified polysilazane, an emulsifier, a reinforcing agent, phenyl trimethyl silane, aluminum hydroxide, dioctyl ester and paraffin oil, performing ultrasonic vibration, and then smelting and extrusion molding, wherein the isocyanate modified polysilazane is prepared by adopting polysilazane (PSN 2) and 4,4' -dicyclohexylmethane diisocyanate (HMDI) for reaction.
Further, the polypropylene is 80 parts by weight, dicumyl peroxide is 3-4 parts by weight, POE is 18-24 parts by weight, SEBS is 15-20 parts by weight, isocyanate modified polysilazane is 8-12 parts by weight, emulsifying agent is 0.5-2 parts by weight, reinforcing agent is 2-5 parts by weight, phenyl trimethyl silane is 1.5-4.5 parts by weight, aluminum hydroxide is 2-5.8 parts by weight, dioctyl ester is 1.2-3.6 parts by weight, and paraffin oil is 0.5-1.5 parts by weight.
It is further preferable that the polypropylene is 80 parts, dicumyl peroxide is 3.6 parts, ethylene-octene elastomer (POE) is 20 parts, SEBS is 16 parts, isocyanate modified polysilazane is 10 parts, emulsifier is 1 part, reinforcing agent is 3 parts, phenyltrimethylsilane is 2 parts, aluminum hydroxide is 5 parts, dioctyl ester is 2 parts, paraffin oil is 1 part, based on the weight parts.
The utility model provides a polypropylene cable protective sheath material which characterized in that: polypropylene, dicumyl peroxide, ethylene-octene tool elastomer (POE), hydrogenated styrene-butadiene-styrene block copolymer (SEBS), isocyanate modified polysilazane, an emulsifier, a reinforcing agent, phenyl trimethyl silane, aluminum hydroxide, dioctyl ester and paraffin oil are mixed for ultrasonic vibration, and then smelting and extrusion molding are carried out, wherein the isocyanate modified polysilazane is prepared by adopting polysilazane (PSN 2) and 4,4' -dicyclohexylmethane diisocyanate (HMDI) for reaction.
Further, the polypropylene is 80 parts by weight, dicumyl peroxide is 3-4 parts by weight, POE is 18-24 parts by weight, SEBS is 15-20 parts by weight, isocyanate modified polysilazane is 8-12 parts by weight, emulsifying agent is 0.5-2 parts by weight, reinforcing agent is 2-5 parts by weight, phenyl trimethyl silane is 1.5-4.5 parts by weight, aluminum hydroxide is 2-5.8 parts by weight, dioctyl ester is 1.2-3.6 parts by weight, and paraffin oil is 0.5-1.5 parts by weight.
It is further preferable that the polypropylene is 80 parts, dicumyl peroxide is 3.6 parts, ethylene-octene elastomer (POE) is 20 parts, SEBS is 16 parts, isocyanate modified polysilazane is 10 parts, emulsifier is 1 part, reinforcing agent is 3 parts, phenyltrimethylsilane is 2 parts, aluminum hydroxide is 5 parts, dioctyl ester is 2 parts, paraffin oil is 1 part, based on the weight parts.
Further, the isocyanate modified polysilazane is specifically prepared by dehydrating PSN2, mixing with HMDI, and reacting at 100 ℃ for 4 hours.
Further, the temperature of the dehydration treatment is 110 ℃, the dehydration treatment is carried out for 1 hour, then the temperature is reduced to 80 ℃, and the HMDI is added for stirring and mixing.
Further, the molar ratio of PSN2 to HMDI was 2:1.
Further, the smelting temperature is 160-180 ℃.
A preparation method of a blending modified polypropylene cable protective sleeve material is characterized by comprising the following steps: firstly, preparing isocyanate modified polysilazane, then mixing polypropylene, dicumyl peroxide (DCP), ethylene-octene tool elastomer (POE), hydrogenated styrene-butadiene-styrene block copolymer (SEBS), isocyanate modified polysilazane, an emulsifier, a reinforcing agent, phenyl trimethylsilane, aluminum hydroxide, dioctyl ester and paraffin oil for ultrasonic oscillation, and then smelting and extrusion molding, wherein the isocyanate modified polysilazane is prepared by adopting polysilazane (PSN 2) and 4,4' -dicyclohexylmethane diisocyanate (HMDI) for reaction.
Further, the polypropylene is 80 parts by weight, dicumyl peroxide is 3-4 parts by weight, POE is 18-24 parts by weight, SEBS is 15-20 parts by weight, isocyanate modified polysilazane is 8-12 parts by weight, emulsifying agent is 0.5-2 parts by weight, reinforcing agent is 2-5 parts by weight, phenyl trimethyl silane is 1.5-4.5 parts by weight, aluminum hydroxide is 2-5.8 parts by weight, dioctyl ester is 1.2-3.6 parts by weight, and paraffin oil is 0.5-1.5 parts by weight.
It is further preferable that the polypropylene is 80 parts, dicumyl peroxide is 3.6 parts, ethylene-octene elastomer (POE) is 20 parts, SEBS is 16 parts, isocyanate modified polysilazane is 10 parts, emulsifier is 1 part, reinforcing agent is 3 parts, phenyltrimethylsilane is 2 parts, aluminum hydroxide is 5 parts, dioctyl ester is 2 parts, paraffin oil is 1 part, based on the weight parts.
Further, the isocyanate modified polysilazane is specifically prepared by dehydrating PSN2, mixing with HMDI, and reacting at 100 ℃ for 4 hours.
Further, the temperature of the dehydration treatment is 110 ℃, the dehydration treatment is carried out for 1 hour, then the temperature is reduced to 80 ℃, and the HMDI is added for stirring and mixing.
Further, the molar ratio of PSN2 to HMDI was 2:1.
Further, the smelting temperature is 160-180 ℃.
The preparation method of the blending modified polypropylene cable protective sleeve material is characterized by comprising the following steps of:
(1) Preparation of isocyanate modified polysilazanes
Dehydrating PSN2 at 110 ℃ for 1h, then cooling to 80 ℃, adding HMDI, stirring for 30min, heating to 100 ℃, continuing to react for 4h, cooling to room temperature after the reaction is finished, and collecting a reaction product which is isocyanate modified polysilazane;
(2) Preparation of polypropylene cable protection sleeve material
According to the mass portion, 80 portions of polypropylene, 3 to 4 portions of dicumyl peroxide, 18 to 24 portions of POE, 15 to 20 portions of SEBS, 8 to 12 portions of isocyanate modified polysilazane, 0.5 to 2 portions of emulsifying agent, 2 to 5 portions of reinforcing agent, 1.5 to 4.5 portions of phenyl trimethyl silane, 2 to 5.8 portions of aluminum hydroxide, 1.2 to 3.6 portions of dioctyl ester and 0.5 to 1.5 portions of paraffin oil are mixed, and then are subjected to ultrasonic oscillation, smelted at 160 to 180 ℃ and then extruded by an extruder to form.
By adding the isocyanate modified polysilazane, the Si-N structure is introduced into the system, so that the high temperature resistance is improved, meanwhile, the Si-C and C=O structures are introduced, the flexibility and the low temperature resistance of the system are improved, and meanwhile, the lubrication effect of basic processing is improved during mixed smelting.
The SBES is added in the invention, is a linear triblock copolymer, has high melting temperature and low elastic modulus, and can further improve the high temperature resistance of the cable protective sleeve, but the addition of the SEBS reduces the volume resistivity and the breaking strength of the material and reduces the breakdown strength due to the poor insulation property of the SEBS.
When elastomer POE is added and mixed and smelted at high temperature, the POE contains a large amount of C=C structure, and can be blended with isocyanate modified polysilazane under the action of dicumyl peroxide DCP serving as a vulcanizing agent to form a complex network structure, so that the melting point and the overall strength of the cable protective sleeve are improved, a large amount of N elements are contained in the system, the insulativity and the flame retarding capability of the system are enhanced, and the problems of resistivity and breaking strength reduction and breakdown strength reduction caused by SEBS are effectively restrained.
The invention has the following technical effects:
according to the invention, through POE and isocyanate modified polysilazane blending modification, the problem of reduced insulativity and mechanical property brought by SEBS in preparation of the polypropylene cable protective sleeve is solved, so that the prepared blending modified polypropylene cable protective sleeve has high melting point and low glass transition temperature, respectively reaches 260 ℃ and-36 ℃, has high temperature and low temperature resistance, has obviously improved insulativity and mechanical property, and has a dielectric constant of 2.74C 2 /(N·M 2 ) The breaking strength is 59MPa, and the breaking elongation reaches 492%.
Drawings
Fig. 1: infrared spectrum of isocyanate modified polysilazane prepared in the invention.
Detailed Description
The present invention is described in detail below by way of examples, which are necessary to be pointed out herein for further illustration of the invention and are not to be construed as limiting the scope of the invention, since numerous insubstantial modifications and adaptations of the invention will be to those skilled in the art in light of the foregoing disclosure.
Example 1
The preparation method of the blending modified polypropylene cable protective sleeve material comprises the following steps:
(1) Preparation of isocyanate modified polysilazanes
Dehydrating PSN2 at 110 ℃ for 1h, then cooling to 80 ℃, adding HMDI, stirring for 30min, heating to 100 ℃, continuing to react for 4h, cooling to room temperature after the reaction is finished, and collecting a reaction product which is isocyanate modified polysilazane;
the reaction equation for PSN2 and HMDI is as follows:
wherein R is
(2) Preparation of polypropylene cable protection sleeve material
80 parts of polypropylene, 3.6 parts of dicumyl peroxide, 20 parts of ethylene-octene elastomer (POE), 16 parts of SEBS, 10 parts of isocyanate modified polysilazane, 1 part of sodium dodecyl benzene sulfonate as an emulsifier, 3 parts of reinforcing agent white carbon black, 2 parts of phenyl trimethyl silane, 5 parts of aluminum hydroxide, 2 parts of dioctyl ester and 1 part of paraffin oil are mixed according to parts by mass, and then are subjected to ultrasonic vibration, smelted at 160-180 ℃, and then extruded and molded by an extruder.
The infrared diagram of the product prepared in the step (1) is shown in FIG. 1, and the infrared diagram is 800-1200cm -1 Within the range of 860cm -1 And 1150cm -1 Is a characteristic absorption peak of Si-N; at 1650cm -1 Characteristic absorption peak of-c=o occurs, whereas at 3350cm -1 Characteristic absorption peak of amide group-N-H appears at 2250cm -1 No characteristic absorption peak of-NCO appears; the synthesis success of the isocyanate modified polysilazane is comprehensively described.
Comparative example 1:
on the basis of example 1, when preparing a polypropylene cable protection jacket material in step (2), replacing SEBS and isocyanate modified polysilazane in example 1 with POE, and preparing the POE modified polypropylene cable protection jacket material by the rest steps which are the same as those in example 1.
Similarly, on the basis of example 1, SEBS is adopted to replace POE and isocyanate modified polysilazane in example 1, so as to prepare SEBS modified polypropylene cable protection sleeve material;
on the basis of example 1, isocyanate modified polysilazane was used to replace POE and SEBS in example 1 to prepare an isocyanate modified polysilazane modified polypropylene cable protective cover.
The average value of each performance was calculated by using the unmodified polypropylene protective sheath prepared by the method in example 1 as a control group without any POE, SEBS and isocyanate modified polysilazane, and the performance of the above 4 polypropylene cable protective sheaths is shown in table 1.
Table 1: performance parameter comparison of 4 kinds of polypropylene cable protective jackets
From the table, the polypropylene cable protective sleeves prepared by modifying POE, SEBS and isocyanate modified polysilazane respectively improve the melting point of the cable protective sleeve material to different degrees, increase the flame retardance of the material and improve other properties to different degrees, but in the polypropylene cable independently modified by SEBS, the breaking strength, dielectric constant, breakdown strength and the like of the polypropylene cable independently modified by SEBS show a decreasing trend.
Example 2
The heat-resistant cable sequentially comprises a conductive wire core, an insulating layer and a protective layer from inside to outside, wherein the protective layer is the modified polypropylene cable protective sleeve material prepared in the embodiment 1.
Comparative example 2
The difference compared to example 1 is that in step (2) the isocyanate modified polysilazane prepared in step (1) is completely replaced with POE and the remaining steps remain the same as in example 1. Namely, the modified substance is POE and SEBS which are compounded, blended and modified to prepare the modified polypropylene cable protection sleeve material. The cable is prepared by taking a cable core, an insulating layer and the prepared blending modified polypropylene cable protection sleeve material as a protection layer, wherein the cable core, the insulating layer and the protection layer are sequentially arranged from inside to outside.
Comparative example 3
The difference compared to example 1 is that in step (2) the isocyanate modified polysilazane is added instead of POE, the remaining steps remain the same as in example 1. Namely, the modified substances are isocyanate modified polysilazane and SEBS which are mixed and modified to prepare the modified polypropylene cable protective jacket material. The cable is prepared by taking a cable core, an insulating layer and the prepared blending modified polypropylene cable protection sleeve material as a protection layer, wherein the cable sequentially comprises a conductive core, the insulating layer and the protection layer from inside to outside.
Example 2
The preparation method of the blending modified polypropylene cable protective sleeve material comprises the following steps:
(1) Preparation of isocyanate modified polysilazanes
Dehydrating PSN2 at 110 ℃ for 1h, then cooling to 80 ℃, adding HMDI, stirring for 30min, heating to 100 ℃, continuing to react for 4h, cooling to room temperature after the reaction is finished, and collecting a reaction product which is isocyanate modified polysilazane;
(2) Preparation of polypropylene cable protection sleeve material
80 parts of polypropylene, 3 parts of dicumyl peroxide, 18 parts of POE, 20 parts of SEBS, 12 parts of isocyanate modified polysilazane, 0.5 part of sodium dodecyl benzene sulfonate serving as an emulsifier, 5 parts of white carbon black serving as a reinforcing agent, 1.5 parts of phenyl trimethylsilane, 5.8 parts of aluminum hydroxide, 1.2 parts of dioctyl ester and 0.5 part of paraffin oil are mixed according to parts by mass, and then are subjected to ultrasonic vibration, smelted at 160-180 ℃, and then extruded and molded by an extruder.
The cable is prepared by taking a cable core, an insulating layer and the prepared blending modified polypropylene cable protection sleeve material as a protection layer, wherein the cable core, the insulating layer and the protection layer are sequentially arranged from inside to outside.
Example 3
The preparation method of the blending modified polypropylene cable protective sleeve material comprises the following steps:
(1) Preparation of isocyanate modified polysilazanes
Dehydrating PSN2 at 110 ℃ for 1h, then cooling to 80 ℃, adding HMDI, stirring for 30min, heating to 100 ℃, continuing to react for 4h, cooling to room temperature after the reaction is finished, and collecting a reaction product which is isocyanate modified polysilazane;
(2) Preparation of polypropylene cable protection sleeve material
According to the mass portion, 80 portions of polypropylene, 4 portions of dicumyl peroxide, 24 portions of POE, 15 portions of SEBS, 8 portions of isocyanate modified polysilazane, 2 portions of emulsifier sodium dodecyl benzene sulfonate, 2 portions of reinforcing agent white carbon black, 4.5 portions of phenyl trimethyl silane, 2 portions of aluminum hydroxide, 3.6 portions of dioctyl ester and 1.5 portions of paraffin oil are mixed, and then are subjected to ultrasonic oscillation, smelted at 160-180 ℃, and then extruded and molded by an extruder.
The cable is prepared by taking a cable core, an insulating layer and the prepared blending modified polypropylene cable protection sleeve material as a protection layer, wherein the cable sequentially comprises a conductive core, the insulating layer and the protection layer from inside to outside.
The average value was calculated by testing each performance parameter of the cables prepared in comparative example 2, comparative example 3 and each example, and the results are shown in table 2.
Table 2: comparative examples and examples comparative examples of performance parameters of corresponding cables were prepared
| Detecting items | Comparative example 2 | Comparative example 3 | Example 1 | Example 2 | Example 3 |
| Melting point | 155-170℃ | 160-180℃ | 165-185℃ | 165-185℃ | 165-185℃ |
| Relative density of | 0.97g/cm 3 | 1.07g/cm 3 | 1.15g/cm 3 | 1.08g/cm 3 | 1.05g/cm 3 |
| Dielectric constant (C2/(N.M) 2 )) | 1.96 | 2.18 | 2.74 | 2.69 | 2.71 |
| Glass transition temperature Tg | -28～-25℃ | -30～-25℃ | -35～-30℃ | -35～-28℃ | -35～-28℃ |
| Breaking strength (MPa) | 39 | 44 | 59 | 56 | 55 |
| Elongation at break (%) | 327 | 376 | 492 | 466 | 448 |
| Volume resistivity (Ω. M) | 0.24*10 14 | 0.89*10 14 | 1.91*10 14 | 1.86*10 14 | 1.68*10 14 |
| Breakdown strength (Kv/mm) | 54.6 | 60.8 | 69.7 | 67.4 | 68.5 |
It can be seen that the polypropylene cable protective jacket material prepared by blending and modifying POE, SEBS and isocyanate modified polysilazane has excellent high temperature resistance and low temperature resistance, and simultaneously has higher dielectric constant, excellent insulativity and obviously improved mechanical property.
Example 4
The heat-resistant cable sequentially comprises a conductive wire core, an insulating layer and a protective layer from inside to outside, wherein the protective layer is the modified polypropylene cable protective sleeve material prepared in the embodiment 1.
Claims (5)
1. A preparation method of a blending modified polypropylene cable protective sleeve material is characterized by comprising the following steps: firstly, preparing isocyanate modified polysilazane, then mixing polypropylene, dicumyl peroxide (DCP), ethylene-octene tool elastomer (POE), hydrogenated styrene-butadiene-styrene block copolymer (SEBS), isocyanate modified polysilazane, an emulsifier, a reinforcing agent, phenyl trimethylsilane, aluminum hydroxide, dioctyl ester and paraffin oil for ultrasonic oscillation, and then smelting and extrusion molding, wherein the isocyanate modified polysilazane is prepared by adopting polysilazane (PSN 2) and 4,4' -dicyclohexylmethane diisocyanate (HMDI) for reaction.
2. The method for preparing the blending modified polypropylene cable protective sleeve material according to claim 1, which is characterized by comprising the following steps: according to the weight portions, the polypropylene is 80 portions, the dicumyl peroxide is 3 to 4 portions, the POE is 18 to 24 portions, the SEBS is 15 to 20 portions, the isocyanate modified polysilazane is 8 to 12 portions, the emulsifying agent is 0.5 to 2 portions, the reinforcing agent is 2 to 5 portions, the phenyl trimethyl silane is 1.5 to 4.5 portions, the aluminum hydroxide is 2 to 5.8 portions, the dioctyl ester is 1.2 to 3.6 portions, and the paraffin oil is 0.5 to 1.5 portions.
3. The method for preparing the blending modified polypropylene cable protective sleeve material according to claim 1 or 2, which is characterized by comprising the following steps: the isocyanate modified polysilazane is prepared by dehydrating PSN2, mixing with HMDI, and reacting at 100 ℃ for 4 hours.
4. A method for preparing a blending modified polypropylene cable protective sheath material according to any one of claims 1-3, wherein: the temperature of the dehydration treatment is 110 ℃, the dehydration treatment is carried out for 1h, then the temperature is reduced to 80 ℃, and the HMDI is added for stirring and mixing.
5. The preparation method of the blending modified polypropylene cable protective sleeve material is characterized by comprising the following steps of:
(1) Preparation of isocyanate modified polysilazanes
Dehydrating PSN2 at 110 ℃ for 1h, then cooling to 80 ℃, adding HMDI, stirring for 30min, heating to 100 ℃, continuing to react for 4h, cooling to room temperature after the reaction is finished, and collecting a reaction product which is isocyanate modified polysilazane;
(2) Preparation of polypropylene cable protection sleeve material
According to the mass portion, 80 portions of polypropylene, 3 to 4 portions of dicumyl peroxide, 18 to 24 portions of POE, 15 to 20 portions of SEBS, 8 to 12 portions of isocyanate modified polysilazane, 0.5 to 2 portions of emulsifying agent, 2 to 5 portions of reinforcing agent, 1.5 to 4.5 portions of phenyl trimethyl silane, 2 to 5.8 portions of aluminum hydroxide, 1.2 to 3.6 portions of dioctyl ester and 0.5 to 1.5 portions of paraffin oil are mixed, and then are subjected to ultrasonic oscillation, smelted at 160 to 180 ℃ and then extruded by an extruder to form.
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| CN202311179940.7A CN117417595A (en) | 2023-09-13 | 2023-09-13 | Temperature-resistant cable and modified polypropylene cable protective sleeve material |
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| CN202311179940.7A CN117417595A (en) | 2023-09-13 | 2023-09-13 | Temperature-resistant cable and modified polypropylene cable protective sleeve material |
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| CN101157776A (en) * | 2007-11-14 | 2008-04-09 | 四川大学 | High-strength high-toughness polypropylene blending composite material and preparation method thereof |
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| US20120264838A1 (en) * | 2011-04-14 | 2012-10-18 | Alliant Techsystems Inc. | Insulating materials comprising polysilazane, methods of forming such insulating materials, and precursor formulations comprising polysilazane |
| WO2023124710A1 (en) * | 2021-12-31 | 2023-07-06 | 天津金发新材料有限公司 | Polypropylene material and preparation method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101157776A (en) * | 2007-11-14 | 2008-04-09 | 四川大学 | High-strength high-toughness polypropylene blending composite material and preparation method thereof |
| CN102449035A (en) * | 2009-03-16 | 2012-05-09 | 弗劳恩霍弗应用技术研究院 | Hybrid polymers made of cyanates and silazanes, method for the production and use thereof |
| CN101735546A (en) * | 2009-12-30 | 2010-06-16 | 浙江北化阻燃材料有限公司 | High flame-retardant and high heat-resisting halogen-free expansion type fire-resistant cable material and preparation method thereof |
| US20120264838A1 (en) * | 2011-04-14 | 2012-10-18 | Alliant Techsystems Inc. | Insulating materials comprising polysilazane, methods of forming such insulating materials, and precursor formulations comprising polysilazane |
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