CN114672076A - Modified natural rubber and preparation method thereof, and high-bearing capacity rubber bridge damping device and preparation method thereof - Google Patents
Modified natural rubber and preparation method thereof, and high-bearing capacity rubber bridge damping device and preparation method thereof Download PDFInfo
- Publication number
- CN114672076A CN114672076A CN202210595485.8A CN202210595485A CN114672076A CN 114672076 A CN114672076 A CN 114672076A CN 202210595485 A CN202210595485 A CN 202210595485A CN 114672076 A CN114672076 A CN 114672076A
- Authority
- CN
- China
- Prior art keywords
- rubber
- natural rubber
- parts
- modified natural
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/041—Elastomeric bearings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Emergency Management (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides modified natural rubber and a preparation method thereof, and a high-bearing capacity rubber bridge damping device and a preparation method thereof, and relates to the technical field of damping materials. The modified natural rubber provided by the invention comprises the following components in parts by mass: 100 parts of natural rubber, 15-25 parts of thermoplastic elastomer resin, 4-9 parts of activating agent, 45-65 parts of reinforcing agent, 1.2-2.2 parts of accelerator and 1.2-2 parts of vulcanizing agent. According to the invention, the thermoplastic elastomer resin is used for modifying the natural rubber, so that the mechanical property and the aging resistance of the natural rubber can be improved; and the affinity of the natural rubber and the stiffening steel plates can be enhanced, and the rubber and the stiffening steel plates are firmly bonded together through the heat vulcanization adhesive. The rubber bridge damping device formed by alternately laminating the modified natural rubber and the stiffening steel plates provided by the invention can keep good horizontal deformation capability, namely damping performance, of the rubber damping device and has high vertical bearing capacity.
Description
Technical Field
The invention relates to the technical field of damping materials, in particular to modified natural rubber and a preparation method thereof, and a high-bearing capacity rubber bridge damping device and a preparation method thereof.
Background
In bridge engineering, in order to meet the requirement of vertical bearing capacity, a steel support is often arranged between an upper structure and an abutment of a bridge, but under the action of operation load on the bridge, the steel support cannot effectively play a role in damping in the horizontal direction, and particularly easily causes the damage of the bridge structure in an earthquake. The rubber bearing is generally formed by alternately laminating natural rubber and stiffening steel plates, and the natural rubber has good horizontal deformability, so that the damping performance of the bridge bearing can be improved. The rubber bridge damping device of the rubber support is gradually replacing a steel support and is widely applied. However, the mechanical property of the natural rubber is low, the bonding strength with a steel plate is also low, the bearing capacity of the existing rubber support is generally about 10MPa, and the bearing capacity is low. In order to meet the requirement of larger bearing capacity, the bearing area of the rubber support needs to be increased. In the continuous girder bridge of large-span, because superstructure is from great, need set up very huge rubber support of volume in order to bear vertical load usually, need very big space during the erection support, and the installation procedure is very loaded down with trivial details, and it is very inconvenient to be under construction.
Disclosure of Invention
In view of the above, the present invention aims to provide a modified natural rubber and a preparation method thereof, and a high bearing capacity rubber bridge damping device and a preparation method thereof. The rubber bridge damping device formed by alternately laminating the modified natural rubber and the stiffening steel plates provided by the invention has high vertical bearing capacity while maintaining good damping performance of the rubber damping device.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a modified natural rubber which comprises the following components in parts by mass:
100 parts of natural rubber, namely 100 parts of natural rubber,
15 to 25 parts of a thermoplastic elastomer resin,
4-9 parts of an activating agent,
45-65 parts of a reinforcing agent,
1.2 to 2.2 parts of an accelerator,
1.2-2 parts of a vulcanizing agent.
Preferably, the thermoplastic elastomer resin is an ionomer manufactured by Dow Corpsson technologies, Inc. having model number IONCX EA 52-40.
Preferably, the activating agent comprises stearic acid and zinc oxide, and the mass ratio of the stearic acid to the zinc oxide is 2: 4-3: 5;
the reinforcing agent is carbon black, and the carbon black comprises one or more of carbon black N110, carbon black N220, carbon black N330 and carbon black N774;
the accelerator comprises a sulfenamide accelerator and a thiazole accelerator, wherein the mass of the sulfenamide accelerator is 60-80% of the sum of the mass of the sulfenamide accelerator and the mass of the thiazole accelerator;
the vulcanizing agent is master colloidal particle sulfur S-80, and the carrier of the master colloidal particle sulfur S-80 is ethylene propylene diene monomer or styrene butadiene rubber.
The invention provides a preparation method of the modified natural rubber in the technical scheme, which comprises the following steps:
plasticating the natural rubber to obtain plasticated rubber;
carrying out first mixing on the plasticated rubber and thermoplastic elastomer resin to obtain a section of mixed rubber;
performing second mixing on the first-stage rubber compound, the activating agent and the reinforcing agent to obtain a second-stage rubber compound;
and carrying out third mixing on the second-stage mixed rubber, the accelerator and the vulcanizing agent to obtain the modified natural rubber.
Preferably, the temperature of the first mixing is 120-140 ℃ and the time is 40-60 s; the second mixing is carried out for 60 to 90 seconds or until the mixing temperature reaches 135 to 145 ℃; the temperature of the third mixing is 70-100 ℃, and the time is 20-40 s.
Preferably, after the first mixing, the second mixing and the third mixing, the method further comprises the step of respectively molding each obtained mixed rubber to obtain a sheet; and after the mixed rubber obtained by the first mixing is molded and sheet-produced, placing the obtained rubber sheet for more than 8 hours.
The invention provides a high-bearing capacity rubber bridge damping device which is formed by alternately laminating modified natural rubber and stiffening steel plates, wherein a heat-vulcanized adhesive layer is arranged between the modified natural rubber and the stiffening steel plates; the modified natural rubber is the modified natural rubber in the technical scheme or the modified natural rubber prepared by the preparation method in the technical scheme.
The invention provides a preparation method of a high-bearing capacity rubber bridge damping device, which comprises the following steps:
coating a hot vulcanization binder on the surface of the stiffening steel plate to obtain the stiffening steel plate coated with the hot vulcanization binder;
cutting the modified natural rubber into pieces to obtain a modified natural rubber sheet;
and (3) alternately laminating the modified natural rubber sheets and the stiffening steel plates coated with the hot vulcanization binder, and then pressurizing, heating and vulcanizing to obtain the high-bearing-capacity rubber bridge damping device.
Preferably, the coating comprises a primary coating and a top coating which are sequentially carried out on the surface of the stiffening steel plate; the primer heat-curable adhesive is kellok 205 or pleton 813, and the topcoat heat-curable adhesive is kellok 220 or pleton 821; the thickness of the primary coating is 8-15 mu m, and the thickness of the top coating is 15-25 mu m.
Preferably, the temperature of the pressurization, heating and vulcanization is 135-145 ℃, the pressure is 8-14 MPa, and the time of heat preservation and pressure maintaining is 40-200 min.
The invention provides a modified natural rubber which comprises the following components in parts by mass: 100 parts of natural rubber, 15-25 parts of thermoplastic elastomer resin, 4-9 parts of activating agent, 45-65 parts of reinforcing agent, 1.2-2.2 parts of accelerator and 1.2-2 parts of vulcanizing agent. The thermoplastic elastomer resin is used for modifying the natural rubber, is a high molecular polymer, has the characteristics of softness, weather resistance and high elastic modulus, can be fused with the natural rubber into a whole in the mixing process of the thermoplastic elastomer resin and the natural rubber, and can improve the mechanical property and aging resistance of the natural rubber; on the other hand, the affinity of the natural rubber and the stiffening steel plate can be enhanced, the rubber and the stiffening steel plate are firmly bonded together through the hot vulcanization adhesive, and the rubber and the steel plate have high peel strength. The rubber bridge damping device formed by alternately laminating the modified natural rubber and the stiffening steel plates provided by the invention can keep good horizontal deformation capability, namely damping performance, of the rubber damping device and has high vertical bearing capacity.
The embodiment result shows that the tensile strength of the modified natural rubber provided by the invention is not lower than 25MPa, the elongation is not lower than 500%, and the peel strength of the modified natural rubber and a stiffening steel plate can reach 26 KN/m; the modified natural rubber and the stiffening steel plates are alternately stacked to form the rubber bridge damping device, when a load of 20MPa is vertically loaded, the vertical compressive strain is not more than 1%, the ultimate bearing capacity of the rubber bridge damping device can reach 200MPa, compared with the existing rubber bridge damping device (the bearing capacity is generally about 10 MPa), the bearing capacity is improved by 1 time, and meanwhile, the shear elastic modulus which is the same as that of the existing bridge damping device is kept, namely, the good horizontal deformation capacity of the existing bridge damping device is kept.
Detailed Description
The invention provides modified natural rubber which comprises the following components in parts by mass:
100 parts of natural rubber, namely 100 parts of natural rubber,
15 to 25 parts of a thermoplastic elastomer resin,
4-9 parts of an activating agent,
45-65 parts of a reinforcing agent,
1.2 to 2.2 parts of an accelerator,
1.2-2 parts of a vulcanizing agent.
In the present invention, the raw materials used are all commercially available products well known to those skilled in the art unless otherwise specified.
The modified natural rubber provided by the invention comprises 100 parts of natural rubber by mass. The natural rubber is not particularly required in the present invention, and natural rubber well known to those skilled in the art may be used.
Based on the mass parts of the natural rubber, the modified natural rubber provided by the invention comprises 15-25 parts of thermoplastic elastomer resin, preferably 15-19 parts. In the invention, the thermoplastic elastomer resin is preferably an ionic polymer which is produced by Chengdu Compss technology Limited and has the model number of IONCX EA52-40, the ionic polymer is an ionic high polymer, is mainly formed by the reaction and polymerization of metal cations and polyolefin, has excellent flexibility, weather resistance and high elastic modulus, and the metal cations contained in the ionic high polymer can also improve the polarity of the surface of natural rubber and enhance the affinity with a steel plate; the specific properties of the ionic polymer are as follows: the tensile strength is more than or equal to 30MPa, the 100% elongation strength is more than or equal to 13MPa, the 300% elongation strength is more than or equal to 18MPa, the elongation is more than or equal to 440%, the elastic modulus is more than or equal to 130MPa, and the thermal deformation temperature is 120-130 ℃. The thermoplastic elastomer resin is used for modifying the natural rubber, is a high molecular polymer, has the characteristics of softness, weather resistance and high elastic modulus, can be fused with the natural rubber into a whole in the mixing process of the thermoplastic elastomer resin and the natural rubber, and can improve the mechanical property and aging resistance of the natural rubber; on the other hand, the affinity of the natural rubber and the stiffening steel plate can be enhanced, the rubber and the stiffening steel plate can be firmly bonded together through the heat vulcanization adhesive, and the rubber and the steel plate have high peel strength.
Based on the mass parts of the natural rubber, the modified natural rubber provided by the invention comprises 4-9 parts of an activating agent, preferably 4-8 parts. In the invention, the activating agent preferably comprises stearic acid and zinc oxide, wherein the mass ratio of the stearic acid to the zinc oxide is preferably 2: 4-3: 5, and specifically can be 2:4 or 3: 5; the activating agent has the specific functions of activating a vulcanization system, improving the crosslinking density of vulcanized rubber and improving the heat resistance of the vulcanized rubber.
Based on the mass parts of the natural rubber, the modified natural rubber provided by the invention comprises 45-65 parts of reinforcing agent, preferably 45-55 parts. In the invention, the reinforcing agent is preferably carbon black, the carbon black preferably comprises one or more of carbon black N110, carbon black N220, carbon black N330 and carbon black N774, and more preferably carbon black N220 or carbon black N330; the reinforcing agent has the specific function of improving the mechanical properties of the rubber, such as strength, hardness and the like.
Based on the mass parts of the natural rubber, the modified natural rubber provided by the invention comprises 1.2-2.2 parts of an accelerator, preferably 1.7-2.2 parts. In the present invention, the accelerator preferably includes a sulfenamide accelerator and a thiazole accelerator, and the mass of the sulfenamide accelerator is preferably 60 to 80%, more preferably 60 to 75% of the sum of the mass of the sulfenamide accelerator and the thiazole accelerator. The present invention does not require any particular accelerator for the sulfenamide-based accelerator and the thiazole accelerator, and the corresponding accelerators well known to those skilled in the art can be used, specifically, the sulfenamide-based accelerators such as N-cyclohexyl-2-benzothiazole sulfonamide (CZ) as an accelerator, N-oxydiethylene-2-benzothiazole sulfonamide (NOBS) as an accelerator, and the thiazole accelerator such as dibenzothiazole Disulfide (DM) as an accelerator and 2-mercaptobenzothiazole (M) as an accelerator. In the invention, the accelerator has the specific functions of shortening the vulcanization time of rubber, reducing the vulcanization temperature, improving the production efficiency and reducing the cost.
Based on the mass parts of the natural rubber, the modified natural rubber provided by the invention comprises 1.2-2 parts of vulcanizing agent, preferably 1.5-1.8 parts. In the invention, the vulcanizing agent is preferably masterbatch sulfur S-80 (sulfur content is 80 wt%), and the carrier of the masterbatch sulfur S-80 is preferably ethylene propylene diene monomer or styrene butadiene rubber.
The invention provides a preparation method of the modified natural rubber in the technical scheme, which comprises the following steps:
plasticating the natural rubber to obtain plasticated rubber;
carrying out first mixing on the plasticated rubber and thermoplastic elastomer resin to obtain a section of mixed rubber;
performing second mixing on the first-stage rubber compound, the activating agent and the reinforcing agent to obtain a second-stage rubber compound;
and carrying out third mixing on the second-stage mixed rubber, the accelerator and the vulcanizing agent to obtain the modified natural rubber.
The invention plasticates natural rubber to obtain plasticated rubber. In the present invention, the plastication is preferably carried out in an internal mixer, the plastication being carried out at a plastication temperature of up to 120 ℃ (the material itself heats up during the plastication). Through the plastication, the natural rubber has good plasticity, can be well blended with the thermoplastic elastomer resin, and is beneficial to the formation of a sea-island structure between the thermoplastic elastomer resin and the natural rubber.
After the plasticated rubber is obtained, the plasticated rubber and the thermoplastic elastomer resin are subjected to first mixing to obtain a section of mixed rubber. Adding a thermoplastic elastomer into plasticated rubber for first mixing; the first mixing temperature is preferably 120-140 ℃, the time is preferably 40-60 s, and more preferably 40-50 s; by the first kneading, the thermoplastic elastomer resin is melted in the natural rubber matrix and is integrated with the natural rubber. After the first mixing, the obtained mixed rubber is preferably subjected to sheet forming, and the sheet forming is preferably performed by an open mill, namely, after the first mixing is performed in an internal mixer, rubber is discharged, and the obtained mixed rubber is subjected to sheet forming in the open mill. After the film is formed and discharged, the obtained film is preferably parked, and the parking time is preferably more than 8 hours; the thermoplastic elastomer resin is more uniformly dispersed in the natural rubber by the placement. The invention mixes the thermoplastic elastomer with the natural rubber firstly, which is beneficial to the thermoplastic elastomer resin to form a 'sea-island' structure in the natural rubber, and combines the excellent elasticity of the natural rubber with the excellent flexibility, weather resistance and high elastic modulus of the thermoplastic elastomer resin, so that the material has the excellent elasticity of the natural rubber, simultaneously improves the mechanical property of the natural rubber and has higher elastic modulus.
After the first-stage rubber compound is obtained, the first-stage rubber compound, the activating agent and the reinforcing agent are subjected to second mixing to obtain a second-stage rubber compound. In the present invention, the second mixing is preferably carried out in an internal mixer; preferably, after the first-stage rubber compound is mixed for 20-40 s, an activator and a reinforcing agent are sequentially added into the first-stage rubber compound for second mixing; the second mixing is preferably carried out for 60-90 s or at a mixing temperature of 135-145 ℃ (after the activator and the reinforcing agent are added, the temperature of the first-stage mixed rubber is reduced, the using amount of the reinforcing agent is relatively large, the temperature is reduced a lot, and the temperature is increased to 135-145 ℃ through the second mixing. After the second mixing, the obtained mixed rubber is preferably subjected to sheet forming, and the sheet forming is preferably performed through an open mill, namely after the second mixing is performed in an internal mixer, rubber is discharged, and the obtained mixed rubber is subjected to sheet forming in the open mill.
After the second-stage rubber compound is obtained, the second-stage rubber compound, the accelerant and the vulcanizing agent are subjected to third mixing to obtain the modified natural rubber. In the present invention, the third mixing is preferably carried out in an internal mixer; the third mixing temperature is preferably 70-100 ℃, the time is preferably 20-40 s, and more preferably 30-35 s. After the third mixing, the obtained mixed rubber is preferably subjected to sheet forming, the sheet forming is preferably performed through an open mill, namely after the third mixing is performed in an internal mixer, rubber is discharged, and the obtained mixed rubber is subjected to sheet forming in the open mill.
The invention provides a high-bearing capacity rubber bridge damping device which is formed by alternately laminating modified natural rubber and stiffening steel plates, wherein a heat-vulcanized adhesive layer is arranged between the modified natural rubber and the stiffening steel plates; the modified natural rubber is the modified natural rubber in the technical scheme or the modified natural rubber prepared by the preparation method in the technical scheme. In the invention, the thickness of the stiffening steel plate is preferably 3-6 mm; the number of layers of the modified natural rubber and the stiffening steel plate and the thickness of the modified natural rubber are set according to the actual requirements on the vertical bearing capacity and the horizontal deformation capacity of the damping device. The present invention does not require the above-mentioned stiffening steel plate, and a stiffening steel plate known to those skilled in the art may be used. The rubber bridge damping device provided by the invention can keep good horizontal deformation capability, namely damping performance, of the rubber damping device, and has high vertical bearing capacity.
The invention provides a preparation method of a high-bearing capacity rubber bridge damping device, which comprises the following steps:
coating a hot vulcanization binder on the surface of the stiffening steel plate to obtain the stiffening steel plate coated with the hot vulcanization binder;
cutting the modified natural rubber into pieces to obtain a modified natural rubber sheet;
and (3) alternately laminating the modified natural rubber sheets and the stiffening steel plates coated with the hot vulcanization binder, and then pressurizing, heating and vulcanizing to obtain the high-bearing-capacity rubber bridge damping device.
Before coating the hot vulcanization adhesive, the invention preferably cuts the stiffened steel plate into required size, and then performs shot blasting rust removal. In the invention, the coating mode is preferably brushing, and the coating preferably comprises primary coating and surface coating which are sequentially carried out on the surface of the stiffening steel plate; the primer heat-curable adhesive is preferably tomaloke 205 or pluronic 813, and the topcoat heat-curable adhesive is preferably tomaloke 220 or pluronic 821; when the undercoated heat-curable adhesive is kelvin 205, the topcoat heat-curable adhesive is further preferably kelvin 220; when the undercoated heat-curable adhesive is Pulex 813, the topcoat heat-curable adhesive is more preferably Pulex 821; the thickness of the primary coating is preferably 8-15 mu m, and the thickness of the top coating is preferably 15-25 mu m. The adhesion to a stiffened steel plate is enhanced through the bottom coating, and the adhesion to modified natural rubber is enhanced through the top coating. After the application of the heat-curable adhesive, the present invention preferably dries the heat-curable adhesive to obtain a stiffened steel plate coated with the heat-curable adhesive.
In the invention, the cutting piece is specifically cut into a required size from the modified natural rubber. In the present invention, the modified natural rubber sheets and the stiffening steel plates coated with the heat-curable adhesive are preferably alternately laminated in the mold. In the invention, the temperature of the pressure heating vulcanization is preferably 135-145 ℃, more preferably 135-143 ℃, the pressure is preferably 8-14 MPa, more preferably 8-10 MPa, and the time of heat preservation and pressure maintaining is preferably 40-200 min, more preferably 70-150 min. In the process of pressurizing, heating and vulcanizing, the natural rubber is vulcanized through pressurizing and heating, the macromolecular chains of the linear structure of the natural rubber are crosslinked into a macromolecular network of a three-dimensional network structure in the vulcanizing process, and the thermoplastic elastomer resin and the natural rubber are uniformly mixed and participate in the vulcanizing process of the natural rubber, and the molecular structures of the thermoplastic elastomer resin and the natural rubber are crosslinked together through the action of a vulcanizing agent to form the compact vulcanized rubber.
The modified natural rubber and the preparation method thereof, and the high-bearing rubber bridge damping device and the preparation method thereof provided by the invention are described in detail below with reference to the examples, but they should not be construed as limiting the scope of the invention.
In various embodiments, the thermoplastic elastomer resin is an ionomer manufactured by Dow Corpsophils technologies, Inc. under the type IONCX EA 52-40.
Example 1
A modified natural rubber comprises the following components (in parts by mass):
100 parts of natural rubber, 15 parts of thermoplastic elastomer resin, 3 parts of zinc oxide, 1.5 parts of stearic acid, 22045 parts of carbon black N, 1.2 parts of sulfenamide accelerator CZ, 0.8 part of thiazole accelerator DM and 801.5 parts of vulcanizing agent masterbatch sulfur S.
The preparation method of the modified natural rubber comprises the following steps:
putting 100 parts by mass of natural rubber into an internal mixer for plasticating, adding 15 parts by mass of thermoplastic elastomer resin when the plasticating temperature is 120 ℃, mixing for 40s, controlling the temperature at 130-140 ℃, discharging rubber to obtain a section of rubber compound, and discharging and standing for at least 8 h;
putting the parked first-stage rubber compound into an internal mixer, mixing for 20s, sequentially adding 3 parts by mass of zinc oxide, 1.5 parts by mass of stearic acid and 22045 parts by mass of carbon black, mixing for 60s or at the mixing temperature of 135 ℃, discharging rubber to obtain a second-stage rubber compound, and discharging pieces for later use;
and (2) putting the two-stage rubber compound, 1.2 parts by mass of sulfenamide accelerator CZ, 0.8 part by mass of thiazole accelerator DM and 0.5 part by mass of vulcanizing agent master rubber grain sulfur S-801.5 into an internal mixer, mixing for 30S, controlling the temperature to be 80-100 ℃, discharging rubber to obtain three-stage rubber compound, and discharging pieces to obtain the modified natural rubber.
A high-bearing capacity rubber bridge damping device is prepared by the following steps:
cutting a stiffened steel plate into a required size, coating a hot vulcanization adhesive on the surface after shot blasting and rust removal, coating a kellogue 205 adhesive on the first surface, coating a kellogue 220 adhesive on the second surface, wherein the thickness of the first coating is 8-15 mu m, and the thickness of the top coating is 15-25 mu m, and airing for later use;
cutting the modified natural rubber film into pieces according to the required size, weighing the pieces and the stiffening steel plates coated with the heat vulcanization adhesive, alternately stacking the pieces and the stiffening steel plates in a mold, pressurizing, heating and vulcanizing at the vulcanization temperature of 135 ℃, the vulcanization pressure of 8MPa and the vulcanization time of 70min to obtain the high-bearing-capacity rubber bridge damping device.
Example 2
A modified natural rubber comprises the following components (in parts by mass):
100 parts of natural rubber, 19 parts of thermoplastic elastomer resin, 4 parts of zinc oxide, 2 parts of stearic acid, 22050 parts of carbon black, 1.5 parts of sulfenamide accelerator CZ, 0.6 part of thiazole accelerator DM and S-801.8 parts of vulcanizing agent masterbatch.
The preparation method of the modified natural rubber comprises the following steps:
putting 100 parts by mass of natural rubber into an internal mixer for plasticating, adding 19 parts by mass of thermoplastic elastomer resin when the plasticating temperature is 120 ℃, mixing for 50s, controlling the temperature at 130-140 ℃, discharging rubber to obtain a section of rubber compound, and discharging and standing for at least 8 h;
putting the parked first-stage rubber compound into an internal mixer, mixing for 25s, sequentially adding 4 parts by mass of zinc oxide, 2 parts by mass of stearic acid and 22050 parts by mass of carbon black, mixing for 75s or at the mixing temperature of 140 ℃, discharging rubber to obtain a second-stage rubber compound, and discharging pieces for later use;
and (2) putting the two-stage rubber compound, 1.5 parts by mass of sulfenamide accelerator CZ, 0.6 part by mass of thiazole accelerator DM and 0.6 part by mass of vulcanizing agent master rubber particle sulfur S-801.8 into an internal mixer, mixing for 35S, controlling the temperature to be 80-100 ℃, discharging rubber to obtain three-stage rubber compound, and discharging pieces to obtain the modified natural rubber.
A high-bearing capacity rubber bridge damping device is prepared by the following steps:
cutting a stiffened steel plate into a required size, coating a hot vulcanization adhesive on the surface after shot blasting and rust removal, coating a Pluton 813 adhesive on the surface, coating a Pluton 821 adhesive on the surface, wherein the thickness of the prime coating is 8-15 mu m, and the thickness of the top coating is 15-25 mu m, and drying for later use;
cutting the modified natural rubber film into pieces according to the required size, weighing the pieces and the stiffening steel plates coated with the heat vulcanization adhesive, alternately stacking the pieces and the stiffening steel plates in a mold, pressurizing, heating and vulcanizing at the vulcanization temperature of 140 ℃, the vulcanization pressure of 10MPa and the vulcanization time of 100min to obtain the high-bearing-capacity rubber bridge damping device.
Example 3
A modified natural rubber comprises the following components (in parts by mass):
100 parts of natural rubber, 25 parts of thermoplastic elastomer resin, 5 parts of zinc oxide, 3 parts of stearic acid, 33055 parts of carbon black N, 1.5 parts of sulfenamide accelerator CZ, 0.5 part of thiazole accelerator DM and 801.5 parts of vulcanizing agent masterbatch sulfur S.
The preparation method of the modified natural rubber comprises the following steps:
putting 100 parts by mass of natural rubber into an internal mixer for plasticating, adding 25 parts by mass of thermoplastic elastomer resin when the plasticating temperature is 120 ℃, mixing for 45s, controlling the temperature at 130-140 ℃, discharging rubber to obtain a section of rubber compound, and discharging and standing for at least 8 h;
putting the parked first-stage rubber compound into an internal mixer, mixing for 30s, sequentially adding 5 parts by mass of zinc oxide, 3 parts by mass of stearic acid and 3 parts by mass of carbon black N33055, mixing for 80s or at the mixing temperature of 140 ℃, discharging rubber to obtain a second-stage rubber compound, and discharging pieces for later use;
and (2) putting the two-stage rubber compound, 1.5 parts by mass of sulfenamide accelerator CZ, 0.5 part by mass of thiazole accelerator DM and 801.5 parts by mass of vulcanizing agent master rubber particle sulfur S-801.5 into an internal mixer, mixing for 35S, controlling the temperature to be 80-100 ℃, discharging rubber to obtain three-stage rubber compound, and discharging pieces to obtain the modified natural rubber.
A high-bearing capacity rubber bridge damping device is prepared by the following steps:
cutting a stiffened steel plate into a required size, coating a hot vulcanization adhesive on the surface after shot blasting and rust removal, firstly coating a Primordial 813 adhesive on the surface, then coating a Primordial 821 adhesive on the surface, wherein the thickness of the prime coating is 8-15 mu m, and the thickness of the top coating is 15-25 mu m, and airing for later use;
cutting the modified natural rubber film into pieces according to the required size, weighing the pieces and the stiffening steel plates coated with the heat vulcanization adhesive, alternately stacking the pieces and the stiffening steel plates in a mold, pressurizing, heating and vulcanizing at the vulcanization temperature of 143 ℃, the vulcanization pressure of 10MPa and the vulcanization time of 120min to obtain the high-bearing-capacity rubber bridge damping device.
The modified natural rubber prepared in the embodiments 1 to 3 and the high-bearing capacity rubber bridge damping device are subjected to mechanical property tests, and the test results are shown in table 1:
TABLE 1 mechanical properties of modified natural rubber and high-bearing rubber bridge damping device in examples 1 to 3
The horizontal damping capacity of the rubber bridge damping device is mainly embodied by the shear elastic modulus, the shear elastic modulus of the conventional rubber bridge damping device is 1MPa, the thermoplastic elastomer resin is used for modifying the natural rubber in the invention, and the hardness and the compressive strength of the natural rubber are enhanced, so that the bearing capacity of the rubber bridge damping device can be improved, when the corresponding rubber bridge damping device is vertically loaded with a load of 20MPa, the vertical compressive strain is not more than 1%, and the limit bearing capacity can reach 200 MPa; but still has lower shear elastic modulus, can still generate larger horizontal deformation when an earthquake occurs, delays the vibration period and plays a role in shock absorption and isolation.
It can be seen from the above embodiments that the rubber bridge damping device formed by alternately laminating the modified natural rubber and the stiffening steel plates provided by the invention has high vertical bearing capacity while maintaining good horizontal deformation capacity, i.e. damping performance, of the rubber damping device.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The modified natural rubber is characterized by comprising the following components in parts by mass:
100 parts of natural rubber, namely 100 parts of natural rubber,
15 to 25 parts of a thermoplastic elastomer resin,
4-9 parts of an activating agent,
45-65 parts of a reinforcing agent,
1.2 to 2.2 parts of an accelerator,
1.2-2 parts of a vulcanizing agent;
the thermoplastic elastomer resin is an ionic polymer which is produced by Kyoko science and technology limited and has the model number of IONCX EA52-40, the ionic polymer is mainly formed by the reaction and polymerization of metal cations and polyolefin, and the specific properties of the ionic polymer are as follows: the tensile strength is more than or equal to 30MPa, the 100% elongation strength is more than or equal to 13MPa, the 300% elongation strength is more than or equal to 18MPa, the elongation is more than or equal to 440%, the elastic modulus is more than or equal to 130MPa, and the thermal deformation temperature is 120-130 ℃.
2. The modified natural rubber according to claim 1, wherein the activator comprises stearic acid and zinc oxide, and the mass ratio of the stearic acid to the zinc oxide is 2: 4-3: 5;
the reinforcing agent is carbon black, and the carbon black comprises one or more of carbon black N110, carbon black N220, carbon black N330 and carbon black N774;
the accelerator comprises a sulfenamide accelerator and a thiazole accelerator, wherein the mass of the sulfenamide accelerator is 60-80% of the sum of the mass of the sulfenamide accelerator and the mass of the thiazole accelerator;
the vulcanizing agent is master colloidal particle sulfur S-80, and the carrier of the master colloidal particle sulfur S-80 is ethylene propylene diene monomer or styrene butadiene rubber.
3. The process for producing a modified natural rubber as described in any one of claims 1 to 2, which comprises the steps of:
plasticating the natural rubber to obtain plasticated rubber;
carrying out first mixing on the plasticated rubber and thermoplastic elastomer resin to obtain a section of mixed rubber;
performing second mixing on the first-stage rubber compound, the activating agent and the reinforcing agent to obtain a second-stage rubber compound;
and carrying out third mixing on the second-stage mixed rubber, the accelerator and the vulcanizing agent to obtain the modified natural rubber.
4. The method according to claim 3, wherein the first kneading is carried out at a temperature of 120 to 140 ℃ for 40 to 60 seconds; the second mixing is carried out for 60 to 90 seconds or until the mixing temperature reaches 135 to 145 ℃; the temperature of the third mixing is 70-100 ℃, and the time is 20-40 s.
5. The method according to claim 3 or 4, wherein after the first mixing, the second mixing and the third mixing, the method further comprises forming each of the obtained mixed rubber into a sheet;
and after the mixed rubber obtained by the first mixing is molded and sheet-output, placing the obtained rubber sheet for more than 8 hours.
6. A high bearing capacity rubber bridge damping device is characterized in that the device is formed by alternately laminating modified natural rubber and stiffening steel plates, and a heat vulcanization adhesive layer is arranged between the modified natural rubber and the stiffening steel plates; the modified natural rubber is the modified natural rubber according to any one of claims 1 to 2 or the modified natural rubber prepared by the preparation method according to any one of claims 3 to 5.
7. The preparation method of the high-bearing capacity rubber bridge damping device is characterized by comprising the following steps of:
coating a hot vulcanization binder on the surface of the stiffening steel plate to obtain the stiffening steel plate coated with the hot vulcanization binder;
cutting the modified natural rubber into pieces to obtain a modified natural rubber sheet;
and (3) alternately laminating the modified natural rubber sheets and the stiffening steel plates coated with the hot vulcanization binder, and then pressurizing, heating and vulcanizing to obtain the high-bearing-capacity rubber bridge damping device.
8. The production method according to claim 7, wherein the coating comprises a primary coating and a top coating which are sequentially performed on the surface of the stiffened steel plate; the primer heat-curable adhesive is kellok 205 or pleton 813, and the topcoat heat-curable adhesive is kellok 220 or pleton 821; the thickness of the primary coating is 8-15 mu m, and the thickness of the top coating is 15-25 mu m.
9. The preparation method according to claim 7, wherein the pressure heating vulcanization is carried out at a temperature of 135 to 145 ℃, at a pressure of 8 to 14MPa, and for a period of 40 to 200 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210595485.8A CN114672076B (en) | 2022-05-30 | 2022-05-30 | Modified natural rubber and preparation method thereof, and high-bearing-capacity rubber bridge damping device and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210595485.8A CN114672076B (en) | 2022-05-30 | 2022-05-30 | Modified natural rubber and preparation method thereof, and high-bearing-capacity rubber bridge damping device and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114672076A true CN114672076A (en) | 2022-06-28 |
| CN114672076B CN114672076B (en) | 2022-09-20 |
Family
ID=82079859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210595485.8A Active CN114672076B (en) | 2022-05-30 | 2022-05-30 | Modified natural rubber and preparation method thereof, and high-bearing-capacity rubber bridge damping device and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114672076B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61255947A (en) * | 1985-05-09 | 1986-11-13 | Mitsui Toatsu Chem Inc | Rubber composition |
| JPS6339938A (en) * | 1986-08-05 | 1988-02-20 | Tosoh Corp | Highly filled rubber composition |
| JP2002322388A (en) * | 2001-04-25 | 2002-11-08 | Tokai Carbon Co Ltd | Surface modified carbon black and rubber composition using the same |
| CN101955601A (en) * | 2010-10-12 | 2011-01-26 | 江苏恒峰线缆有限公司 | Chloroprene rubber improved by employing ionomer |
| CN103835371A (en) * | 2014-03-17 | 2014-06-04 | 中国建筑标准设计研究院 | Nylon rubber seismic isolation support and manufacturing method thereof |
| CN106009093A (en) * | 2016-08-17 | 2016-10-12 | 西安达盛隔震技术有限公司 | Special material for nanometer rubber support |
| CN112779855A (en) * | 2020-12-29 | 2021-05-11 | 天津市市政工程设计研究院 | Special high-performance rubber support for ductility earthquake-resistant system |
-
2022
- 2022-05-30 CN CN202210595485.8A patent/CN114672076B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61255947A (en) * | 1985-05-09 | 1986-11-13 | Mitsui Toatsu Chem Inc | Rubber composition |
| JPS6339938A (en) * | 1986-08-05 | 1988-02-20 | Tosoh Corp | Highly filled rubber composition |
| JP2002322388A (en) * | 2001-04-25 | 2002-11-08 | Tokai Carbon Co Ltd | Surface modified carbon black and rubber composition using the same |
| CN101955601A (en) * | 2010-10-12 | 2011-01-26 | 江苏恒峰线缆有限公司 | Chloroprene rubber improved by employing ionomer |
| CN103835371A (en) * | 2014-03-17 | 2014-06-04 | 中国建筑标准设计研究院 | Nylon rubber seismic isolation support and manufacturing method thereof |
| CN106009093A (en) * | 2016-08-17 | 2016-10-12 | 西安达盛隔震技术有限公司 | Special material for nanometer rubber support |
| CN112779855A (en) * | 2020-12-29 | 2021-05-11 | 天津市市政工程设计研究院 | Special high-performance rubber support for ductility earthquake-resistant system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114672076B (en) | 2022-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6602958B2 (en) | Adhesives for bonding composites | |
| ES2894960T3 (en) | Sheet molding compound (SMC), process for its manufacture and hybrid material containing the molded SMC | |
| US20100222522A1 (en) | Resinous materials, articles made therewith and methods of producing same | |
| KR101511534B1 (en) | The thermosetting resin molding product for inserted steel | |
| WO2006037538A1 (en) | Urethane acrylate composite structure | |
| CN104817730B (en) | Shock mount high-performance rubber composite and preparation method thereof | |
| CN103205028A (en) | Organic clay rubber composite material for laminated rubber supporting seat and preparation process thereof | |
| KR20190022664A (en) | Compositions comprising fiber materials, multistage polymers and (meth) acrylic polymers, processes for their preparation, and uses thereof | |
| CN114013151B (en) | Gradient multilayer damping material and preparation method thereof | |
| CN112534018B (en) | Adhesive composition | |
| CN114672076B (en) | Modified natural rubber and preparation method thereof, and high-bearing-capacity rubber bridge damping device and preparation method thereof | |
| CN113183386B (en) | High-compression-resistance fiber-reinforced polyurethane composite board and preparation method thereof | |
| JP2007217665A (en) | Prepreg and carbon fiber reinforced composite material | |
| CN109679177A (en) | Wire-mesh core damping rubber blanket peculiar to vessel and preparation method thereof | |
| CN112852365A (en) | High-toughness high-strength epoxy composite material with plastic replacing steel and preparation method thereof | |
| KR102311351B1 (en) | Light weight sandwich steel sheet using polyamide and manufacturing method thereof | |
| CN114015377B (en) | Wide-temperature-range gradient multilayer self-adhesion type constrained damping material and preparation method thereof | |
| CN110315834B (en) | Structure/damping composite material and preparation method thereof | |
| CN109732802B (en) | Preparation process of embedded co-curing damping composite material T-shaped stiffened plate | |
| CN111138791A (en) | Elastomer enhanced type ultrahigh damping shock insulation rubber and preparation method thereof | |
| Manikandan et al. | Utilization of bioresources such as coir-pith, saw dust and palmyra fiber as reinforcement material in polyester matrix | |
| CN116333507B (en) | Steel slag doped asphalt concrete super-tough high-strength wearing layer and preparation thereof | |
| CN117417580B (en) | Rubber material, preparation method thereof and environment-adaptive rubber support | |
| CN113956579B (en) | High-heat-resistant adhesive and preparation method and application thereof | |
| CN115651324B (en) | Wide-temperature-range high-damping composite rubber material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |