CN116262848A - High-performance carbon fiber synchronous belt and preparation method thereof - Google Patents
High-performance carbon fiber synchronous belt and preparation method thereof Download PDFInfo
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- CN116262848A CN116262848A CN202211623821.1A CN202211623821A CN116262848A CN 116262848 A CN116262848 A CN 116262848A CN 202211623821 A CN202211623821 A CN 202211623821A CN 116262848 A CN116262848 A CN 116262848A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 56
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 23
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 23
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 15
- RRAFCDWBNXTKKO-UHFFFAOYSA-N eugenol Chemical compound COC1=CC(CC=C)=CC=C1O RRAFCDWBNXTKKO-UHFFFAOYSA-N 0.000 claims abstract description 98
- 229920006168 hydrated nitrile rubber Polymers 0.000 claims abstract description 83
- NPBVQXIMTZKSBA-UHFFFAOYSA-N Chavibetol Natural products COC1=CC=C(CC=C)C=C1O NPBVQXIMTZKSBA-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000005770 Eugenol Substances 0.000 claims abstract description 53
- UVMRYBDEERADNV-UHFFFAOYSA-N Pseudoeugenol Natural products COC1=CC(C(C)=C)=CC=C1O UVMRYBDEERADNV-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229960002217 eugenol Drugs 0.000 claims abstract description 53
- QUKRIOLKOHUUBM-UHFFFAOYSA-N 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl prop-2-enoate Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CCOC(=O)C=C QUKRIOLKOHUUBM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 27
- 229920001971 elastomer Polymers 0.000 claims abstract description 20
- 239000005060 rubber Substances 0.000 claims abstract description 16
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 11
- 239000006229 carbon black Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 13
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 11
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims description 10
- 230000003712 anti-aging effect Effects 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 10
- 239000003960 organic solvent Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000005984 hydrogenation reaction Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- -1 eugenol sodium salt Chemical class 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 8
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 7
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 7
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 claims description 3
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- 239000012046 mixed solvent Substances 0.000 description 10
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
-
- 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
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
-
- 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
- C08F285/00—Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G1/00—Driving-belts
- F16G1/06—Driving-belts made of rubber
- F16G1/08—Driving-belts made of rubber with reinforcement bonded by the rubber
- F16G1/10—Driving-belts made of rubber with reinforcement bonded by the rubber with textile reinforcement
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention relates to the field of synchronous belts, and provides a high-performance carbon fiber synchronous belt and a preparation method thereof, aiming at the problem that special equipment is required for preparing a high-strength synchronous belt. The high-performance carbon fiber synchronous belt comprises a framework, and main body rubber and wrapping cloth which are wrapped outside the framework, wherein the main body rubber is high-hardness hydrogenated nitrile rubber, and the high-hardness hydrogenated nitrile rubber contains the following components: eugenol and perfluorooctyl ethyl acrylate modified HNBR, carbon black and an auxiliary agent. The high-hardness hydrogenated nitrile rubber can improve the strength and high-temperature resistance of the synchronous belt, and the layers of the synchronous belt can be compounded together by using common rubber belt equipment. The invention also provides a preparation method of the high-performance carbon fiber synchronous belt, which comprises the steps of firstly mixing all components of the high-hardness hydrogenated nitrile rubber to obtain the high-hardness hydrogenated nitrile rubber; and then combining the framework, the main body adhesive and the wrapping cloth, and vulcanizing to obtain the synchronous belt.
Description
Technical Field
The invention relates to the field of synchronous belts, in particular to a high-performance carbon fiber synchronous belt and a preparation method thereof.
Background
The synchronous belt is an annular belt which takes a steel wire rope or glass fiber as a strong layer and is covered with polyurethane or chloroprene rubber, and the inner periphery of the belt is made into a tooth shape so as to be meshed with a tooth-shaped belt wheel. When the synchronous belt is in transmission, the synchronous belt teeth are meshed with tooth grooves of the synchronous belt wheels to transmit power, the transmission ratio is accurate, the acting force on a shaft is small, the structure is compact, the oil resistance and the wear resistance are good, and the ageing resistance is good.
The prior synchronous belt has short service life, and the main reason is that the heat resistance of the material is required to be improved due to the overhigh temperature under the condition of high-speed operation. However, the synchronous belt is inevitably worn after a period of use, and how to improve the strength of the synchronous belt and prolong the service life of the synchronous belt is also a subject of constant research. Patent US6964626B1 to geneva discloses a timing belt comprising an elastomeric body portion and a pulley contacting portion at the inner periphery of the body portion, a tensile layer being located in the elastomeric body portion to provide support and strength to the tape. The elastomer body is a specially-made high-temperature polyurethane/urea elastomer, has higher flex resistance, oil resistance and hydrolysis resistance, and shows that the bearing capacity is improved. However, because of the main elastomer material, special equipment is required to compound the main elastomer material with other layers during processing and preparing the synchronous belt, so that the preparation cost is greatly increased, and an ideal solution is needed.
Disclosure of Invention
In order to overcome the problem that special equipment is required for preparing the high-strength synchronous belt, the invention provides the high-performance carbon fiber synchronous belt, and the strength and the high-temperature resistance of the synchronous belt are improved by optimizing the main rubber material on the premise of not changing synchronous belt production equipment.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the high-performance carbon fiber synchronous belt comprises a framework, main body rubber and wrapping cloth, wherein the main body rubber is high-hardness hydrogenated nitrile rubber, and the high-hardness hydrogenated nitrile rubber comprises the following components: eugenol and perfluorooctyl ethyl acrylate modified HNBR, carbon black and an auxiliary agent. The invention uses high-hardness hydrogenated nitrile rubber, can improve the strength and high temperature resistance of the synchronous belt, and can compound all layers of the synchronous belt together by using common rubber belt equipment.
Preferably, the preparation method of the modified HNBR comprises the following steps: 1) Preparing HNBR with the hydrogenation degree of 60-70% into a glue solution, adding water and sodium dodecyl benzene sulfonate, stirring to obtain an emulsion, adding eugenol and dibenzoyl peroxide, reacting for 5-7h at the temperature of 60-80 ℃, precipitating, and drying to obtain eugenol grafted HNBR;
2) Dispersing the eugenol grafted HNBR and sodium methoxide in an organic solvent, heating and refluxing for reaction for 3-5h, and removing the organic solvent to obtain eugenol sodium salt grafted HNBR;
3) Dispersing the HNBR grafted by the eugenol sodium salt in an organic solvent, adding perfluorooctyl ethyl acrylate, stirring for 1-2h, heating and refluxing for 6-8h, removing the organic solvent, and washing to obtain the product modified HNBR.
Eugenol contains a benzene ring structure, and can improve high temperature resistance after being grafted to HNBR. The invention selects HNBR with 60-70% hydrogenation degree, and the molecular main chain thereof is reserved with double bonds, so that double bonds of eugenol can be grafted. However, after the eugenol is grafted, the regular form of the HNBR molecular chain is destroyed, and the tensile strength is reduced, so that the perfluorooctyl ethyl acrylate is continuously grafted by using the phenolic hydroxyl of the eugenol on the basis of the grafting of the eugenol. The perfluoro octyl ethyl acrylate is generally used as a surfactant, and the fluorine-containing long chain is used for cross-linking, so that the hardness and strength of the HNBR are improved, and the overall performance of the modified HNBR is improved.
Preferably, the mass ratio of HNBR, eugenol and perfluorooctyl ethyl acrylate is (10-20): 1 (3-5).
Preferably, in step 1): the mass fraction of the glue solution is 5-10%; the mass of the dibenzoyl peroxide is 1-2% of that of HNBR; the precipitation is carried out by adding ethanol. In step 2): the mass ratio of the eugenol grafted HNBR to the sodium methoxide is (4-8): 1; the organic solvent is a mixed solvent of toluene and chlorobenzene; the water produced is continuously separated out during the reaction. In step 3): the organic solvent is a mixed solvent of dichloromethane and chlorobenzene.
Preferably, the formula of the high-hardness hydrogenated nitrile rubber comprises the following components in parts by weight: 100 parts of modified HNBR, 20-40 parts of carbon black and 8-10 parts of auxiliary agent.
Preferably, the carbon black has a particle diameter of 20-30nm and a specific surface area of 100-120m 2 /g。
Preferably, the auxiliary agent comprises: vulcanizing agent, accelerator, anti-aging agent, dispersant and scorch retarder. The auxiliaries are all customary choices, for example: the vulcanizing agent adopts sulfur; the accelerator adopts accelerator CZ; the anti-aging agent is selected from anti-aging agent 4020, anti-aging agent RD or anti-aging agent MB; the dispersing agent adopts Rhin plastic fraction Aktiplast PP; the anti-scorching agent adopts an anti-scorching agent CTP.
Preferably, the wrapping cloth is high-strength heat-resistant nylon elastic cloth, and the framework is a carbon fiber rope.
The invention also provides a preparation method of the high-performance carbon fiber synchronous belt, which comprises the following steps:
(1) Mixing the components of the high-hardness hydrogenated nitrile rubber to obtain the high-hardness hydrogenated nitrile rubber;
(2) And combining the framework, the main body adhesive and the wrapping cloth, and vulcanizing to obtain the synchronous belt.
Preferably, the vulcanization condition in the step (2) is (150-170) DEG C X (10-15) MPa X (30-40) min.
Preferably, the method is stopped for 20-28h after the vulcanization is finished.
Therefore, the invention has the beneficial effects that: (1) The high-hardness hydrogenated nitrile rubber can improve the strength and high-temperature resistance of the synchronous belt, and the layers of the synchronous belt can be compounded together by using common rubber belt equipment. (2) The eugenol contains a benzene ring structure, and can improve the high temperature resistance after being grafted to HNBR, but after being grafted with the eugenol, the normal form of an HNBR molecular chain is destroyed, and the tensile strength is reduced.
Detailed Description
The technical scheme of the invention is further described through specific embodiments.
In the present invention, unless otherwise specified, the materials and equipment used are commercially available or are commonly used in the art, and the methods in the examples are conventional in the art unless otherwise specified.
General examples
The high-performance carbon fiber synchronous belt comprises a framework, main body glue and wrapping cloth, wherein the main body glue is high-hardness hydrogenated nitrile butadiene rubber, and the formula of the high-hardness hydrogenated nitrile butadiene rubber is as follows in parts by weight: 100 parts of eugenol and perfluorooctyl ethyl acrylate modified HNBR, 20-40 parts of carbon black and 8-10 parts of auxiliary agent. The particle diameter of the carbon black is 20-30nm, and the specific surface area is 100-120m 2 And/g. The auxiliary agent comprises a vulcanizing agent, an accelerator, an anti-aging agent, a dispersing agent and a scorch retarder.
The preparation method of the modified HNBR comprises the following steps: 1) Preparing HNBR with the hydrogenation degree of 60-70% into a glue solution with the mass fraction of 5-10%, adding water and sodium dodecyl benzene sulfonate, stirring to obtain emulsion, adding eugenol and dibenzoyl peroxide, reacting for 5-7h at the temperature of 60-80 ℃, adding ethanol for precipitation, and drying to obtain eugenol grafted HNBR;
2) Mixing and dispersing the eugenol grafted HNBR and sodium methoxide in a mixed solvent of toluene and chlorobenzene according to the mass ratio (4-8) 1, heating and refluxing for 3-5h, continuously separating out generated water in the reaction process, and evaporating the mixed solvent after the reaction is finished to obtain the eugenol sodium salt grafted HNBR;
3) Dispersing the HNBR grafted by the eugenol sodium salt in a mixed solvent of dichloromethane and chlorobenzene, adding perfluorooctyl ethyl acrylate, stirring for 1-2h, heating and refluxing for 6-8h, removing the mixed solvent, and washing to obtain the product modified HNBR; wherein the mass ratio of HNBR, eugenol and perfluorooctyl ethyl acrylate is (10-20) 1 (3-5), and the mass of dibenzoyl peroxide is 1-2% of that of HNBR.
The invention also provides a preparation method of the high-performance carbon fiber synchronous belt, which comprises the following steps:
(1) Mixing the components of the high-hardness hydrogenated nitrile rubber to obtain the high-hardness hydrogenated nitrile rubber;
(2) And combining the framework, the main body adhesive and the wrapping cloth, and vulcanizing to obtain the synchronous belt, wherein the vulcanizing condition is (150-170) DEG C (10-15) MPa (30-40) min, and standing for 20-28h after vulcanizing.
Example 1
The high-performance carbon fiber synchronous belt consists of a framework, main body rubber and wrapping cloth, wherein the main body rubber is wrapped outside the framework, the framework is a carbon fiber rope, the wrapping cloth is high-strength heat-resistant nylon elastic cloth, and the main body rubber is high-hardness hydrogenated nitrile rubber. The formula of the high-hardness hydrogenated nitrile rubber comprises the following components in parts by weight: 100 parts of HNBR, 30 parts of carbon black and 9 parts of auxiliary agents are modified by eugenol and perfluorooctyl ethyl acrylate in sequence. The particle diameter of the carbon black is 20nm, and the specific surface area is 100m 2 And/g. The auxiliary agent comprises a vulcanizing agent, an accelerator, an anti-aging agent, a dispersing agent and a scorch retarder, wherein the vulcanizing agent adopts sulfur, the accelerator adopts accelerator CZ, the anti-aging agent adopts an anti-aging agent 4020, and the dispersing agent adopts Rhin plastic fraction Aktiplast PP; the anti-scorching agent adopts an anti-scorching agent CTP.
The preparation method of the modified HNBR comprises the following steps: 1) HNBR having a degree of hydrogenation of 60% (weight-average molecular weight Mw of 3X 10) 5 ) Dissolving in chlorobenzene to prepare 5wt% glue solution, adding water and sodium dodecyl benzene sulfonate, stirring to obtain emulsion, adding eugenol and dibenzoyl peroxide, reacting at 70deg.C for 6 hr,precipitating with ethanol, and oven drying to obtain eugenol grafted HNBR;
2) Mixing and dispersing the eugenol grafted HNBR and sodium methoxide in a mixed solvent of toluene and chlorobenzene according to a mass ratio of 5:1, heating and refluxing for 4 hours, continuously separating out generated water in the reaction process, and steaming out the mixed solvent after the reaction is finished to obtain eugenol sodium salt grafted HNBR;
3) Dispersing the HNBR grafted by the eugenol sodium salt in a mixed solvent of dichloromethane and chlorobenzene, adding perfluorooctyl ethyl acrylate, stirring for 1h, heating and refluxing for 7h, evaporating the mixed solvent, adding ethyl acetate, and washing with hydrochloric acid to obtain the product modified HNBR;
wherein the mass ratio of HNBR, eugenol and perfluorooctyl ethyl acrylate is 15:1:4, and the mass of dibenzoyl peroxide is 1% of the mass of HNBR.
The invention also provides a preparation method of the high-performance carbon fiber synchronous belt, which comprises the following steps:
(1) Mixing the components of the high-hardness hydrogenated nitrile rubber to obtain the high-hardness hydrogenated nitrile rubber;
(2) And combining the framework, the main body adhesive and the wrapping cloth, vulcanizing to obtain the synchronous belt, wherein the vulcanizing condition is 160 ℃ multiplied by 12MPa multiplied by 30min, and standing for 24h after vulcanizing.
Example 2
The difference from example 1 is that the mass ratio of HNBR, eugenol, perfluorooctyl ethyl acrylate is 15:1:7.
Example 3
The difference from example 1 is that the mass ratio of HNBR, eugenol, perfluorooctyl ethyl acrylate is 15:3:4.
Comparative example 1
The difference with the embodiment 1 is that the main body rubber is common hydrogenated nitrile rubber, and the formula of the hydrogenated nitrile rubber comprises the following components in parts by weight: 100 parts of HNBR with the hydrogenation degree of 70%, 30 parts of carbon black and 9 parts of auxiliary agent.
Comparative example 2
The difference from example 1 is that the modified HNBR is eugenol modified HNBR, and the preparation method is as follows: HNBR having a degree of hydrogenation of 60% (weight-average molecular weight Mw of 3X 10) 5 ) Preparing a glue solution with the mass fraction of 5%, adding water and sodium dodecyl benzene sulfonate, stirring to obtain an emulsion, adding eugenol and dibenzoyl peroxide, reacting for 6 hours at 70 ℃, adding ethanol for precipitation, and drying to obtain the eugenol grafted HNBR. Wherein the mass ratio of HNBR to eugenol is 15:1:4, and the mass of dibenzoyl peroxide is 1% of the mass of HNBR.
Comparative example 3
The difference from example 1 is that the modified HNBR is perfluorooctyl ethyl acrylate modified HNBR, and the preparation method is as follows: HNBR having a degree of hydrogenation of 60% (weight-average molecular weight Mw of 3X 10) 5 ) Preparing a glue solution with the mass fraction of 5%, adding water and sodium dodecyl benzene sulfonate, stirring to obtain emulsion, adding perfluorooctyl ethyl acrylate and dibenzoyl peroxide, reacting at 80 ℃ for 7 hours, adding ethanol for precipitation, and drying to obtain perfluorooctyl ethyl acrylate grafted HNBR. Wherein the mass ratio of HNBR to perfluorooctyl ethyl acrylate is 15:4, and the mass of dibenzoyl peroxide is 1% of the mass of HNBR.
Comparative example 4
The difference from example 1 is that the modified HNBR is a synchronous modified HNBR of eugenol and perfluorooctyl ethyl acrylate, and the preparation method is as follows: HNBR having a degree of hydrogenation of 60% (weight-average molecular weight Mw of 3X 10) 5 ) Preparing a glue solution with the mass fraction of 5%, adding water and sodium dodecyl benzene sulfonate, stirring to obtain emulsion, adding eugenol, perfluorooctyl ethyl acrylate and dibenzoyl peroxide, reacting at 80 ℃ for 7 hours, adding ethanol for precipitation, and drying to obtain HNBR with synchronous grafting of eugenol and perfluorooctyl ethyl acrylate. Wherein the mass ratio of HNBR, eugenol and perfluorooctyl ethyl acrylate is 15:1:4, and the mass of dibenzoyl peroxide is 3% of the mass of HNBR.
Performance testing
The performance of the synchronous belt obtained according to the scheme of the general embodiment is shown in the following table (according to the power requirement of the electric motorcycle), and the synchronous belt prepared by the method can meet the power requirement of the electric motorcycle, improves the strength and high temperature resistance of the synchronous belt, and can be compounded by using common rubber belt equipment. The test temperature of the high temperature high load endurance life was 120℃and the load was 30N.
| Project | In the state of supply of goods |
| Hardness (Shore/A) | 95±3 |
| Tensile Strength (N/mm) | ≥2000 |
| Tooth shear strength (N/mm) | ≥150 |
| Core rope adhesive Strength (N) | ≥700 |
| High temperature high load durability life (h) | ≥400 |
The effect of each step, parameter on the performance of the synchronous belt and on the maximum degradation rate temperature of HNBR was further analyzed and the data for each example and comparative example were measured as shown in the following table.
From the table above, it can be seen that: comparative example 1 using conventional HNBR, the resulting synchronous belt had far less tensile properties and high temperature resistance than example 1. The HNBR employed in comparative example 2 was only eugenol-modified, and the high temperature resistance was improved as compared with comparative example 1, but the tensile strength was slightly lowered instead. The HNBR adopted in comparative example 3 is modified only by perfluoro octyl ethyl acrylate, and the improvement of the high temperature resistance is not obvious. Comparative example 4 in which eugenol and perfluorooctyl ethyl acrylate are both grafted on unsaturated double bonds of HNBR, the tensile property and the high temperature resistance of the prepared synchronous belt are not as good as those of example 1, on one hand, the eugenol and perfluorooctyl ethyl acrylate are both grafted on the unsaturated double bonds of HNBR to occupy excessive double bonds of HNBR, and the elasticity of HNBR chain segments can be reduced, so that the high-temperature high-load durable life of the synchronous belt is reduced; on the other hand, too many polar groups also lower the elasticity of the HNBR molecular chain, in contrast to the perfluorooctyl ethyl acrylate grafted to eugenol in example 1, which occupies less HNBR double bonds and consumes both polar groups to form an ester.
Compared with example 1, the perfluorooctyl ethyl acrylate of example 2 was outside the preferred range and the eugenol of example 3 was outside the preferred range, and the effect was not as good as that of example 1, indicating that the reagents could achieve the best effect only within the preferred range of the invention. When the using amount of the eugenol is excessive, excessive double bonds of HNBR are occupied, and the elasticity of an HNBR chain segment can be reduced, so that the high-temperature high-load durable service life of the synchronous belt is reduced, and part of eugenol can be self-polymerized and can not participate in grafting reaction, so that waste is caused.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalent changes and variations in the above-mentioned embodiments can be made by those skilled in the art without departing from the scope of the present invention.
Claims (8)
1. The high-performance carbon fiber synchronous belt is characterized by comprising a framework, main body rubber and wrapping cloth, wherein the main body rubber is coated outside the framework, the main body rubber is high-hardness hydrogenated nitrile rubber, and the high-hardness hydrogenated nitrile rubber contains the following components: eugenol and perfluorooctyl ethyl acrylate modified HNBR, carbon black and an auxiliary agent.
2. The high performance carbon fiber synchronous belt according to claim 1, wherein the modified HNBR is prepared by the following steps:
1) Preparing HNBR with the hydrogenation degree of 60-70% into a glue solution, adding water and sodium dodecyl benzene sulfonate, stirring to obtain an emulsion, adding eugenol and dibenzoyl peroxide, reacting for 5-7h at the temperature of 60-80 ℃, precipitating, and drying to obtain eugenol grafted HNBR;
2) Dispersing the eugenol grafted HNBR and sodium methoxide in an organic solvent, heating and refluxing for reaction for 3-5h, and removing the organic solvent to obtain eugenol sodium salt grafted HNBR;
3) Dispersing the HNBR grafted by the eugenol sodium salt in an organic solvent, adding perfluorooctyl ethyl acrylate, stirring for 1-2h, heating and refluxing for 6-8h, removing the organic solvent, and washing to obtain the product modified HNBR.
3. The high-performance carbon fiber synchronous belt according to claim 2, wherein the mass ratio of HNBR, eugenol and perfluorooctyl ethyl acrylate is (10-20): 1 (3-5).
4. The high-performance carbon fiber synchronous belt according to claim 1, wherein the high-hardness hydrogenated nitrile rubber comprises the following components in parts by weight: 100 parts of modified HNBR, 20-40 parts of carbon black and 8-10 parts of auxiliary agent.
5. The high performance carbon fiber synchronous belt as in claim 1 or 4 wherein the auxiliary comprises: vulcanizing agent, accelerator, anti-aging agent, dispersant and scorch retarder.
6. The high performance carbon fiber synchronous belt according to claim 1 wherein the wrap is a high strength heat resistant nylon elastic fabric and the skeleton is a carbon fiber rope.
7. The method for preparing the high-performance carbon fiber synchronous belt as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) Mixing the components of the high-hardness hydrogenated nitrile rubber to obtain the high-hardness hydrogenated nitrile rubber;
(2) And combining the framework, the main body adhesive and the wrapping cloth, and vulcanizing to obtain the synchronous belt.
8. The method according to claim 7, wherein the conditions for the vulcanization in the step (2) are (150-170) °c× (10-15) mpa× (30-40) min.
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