CN105885131B - Shock isolating pedestal ekalead polymer composite and preparation method thereof - Google Patents
Shock isolating pedestal ekalead polymer composite and preparation method thereof Download PDFInfo
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- CN105885131B CN105885131B CN201610262851.2A CN201610262851A CN105885131B CN 105885131 B CN105885131 B CN 105885131B CN 201610262851 A CN201610262851 A CN 201610262851A CN 105885131 B CN105885131 B CN 105885131B
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
Shock isolating pedestal ekalead polymer composite and preparation method thereof belongs to field of rubber technology, the technical problem to be solved is to provide the novel high polymer composite making high-damping core with lead metal similar nature, to replace the metal lead for retractable pencil of shock isolating pedestal, the unleaded of new shock isolating pedestal is realized.Nitrile rubber is used for matrix, organic clay of the addition with nano-lamellar structure.The mass ratio of organic clay and nitrile rubber is (60~150):100, obtained laminated rubber bases have excellent damping capacity, equivalent level rigidity low and low land seismic wave under it is yielding the features such as, compared with lead metal core, the demand of bearing can be better met.
Description
Technical field
The invention belongs to field of rubber technology, it is related to shock isolating pedestal novel high polymer composite and preparation method thereof,
The material has the mechanical property and damping characteristic close with lead metal, the high-damping lead available for building, in isolation bridge bearing
The replacement of core.
Background technology
Earthquake is a kind of sudden, and frequency is high, it is difficult to the natural calamity of prediction, to the very harmful of human society.Earthquake
And its secondary disaster triggered causes building, a large amount of of bridge facility to collapse and destroy, and the lives and properties of the mankind is caused huge
Big loss.Compared with traditional firm method anti-seismic technology, the damping effect of the rubber earthquake isolation support based on " base isolation concept " is more
To be excellent.In recent years, shock isolating pedestal has become world today's high anti-seismic, the important building of shockproof requirement, the first choice of bridge
Scheme.Shock isolating pedestal is as the critical elements of " base isolation ", and on the one hand its major function is supporting building, the weight of bridge
Amount, is on the other hand the dynamic characteristics for changing structural system, mainly extends building, the natural vibration period of bridge, so that effectively
Reduce its earthquake response.
At present, what is be most widely used in shock isolating pedestal is normal stack rubber support and lead core rubber support.(1) it is general
Logical laminated rubber bases, general using natural rubber manufacture, the characteristics of natural gum has high flexibility, high resiliency, high intensity assigns
The good vertical bearing capacity of bearing and horizontal shear deformability.But the damping capacity difference of this bearing is, it is necessary to and damper
And with improve damping.Because damper involves great expense, the application of the type bearing is limited；(2) lead core rubber support, be
In normal stack rubber support, one or more lead rods are poured into vertically, so as to improve the damping capacity of bearing.But lead-rubber
Bearing equivalent level rigidity is high, often exceeds critical field, when earthquake occurs, and surrender fracture, automatic recovery ability easily occur for lead for retractable pencil
Decline.In addition under normal load, the effect of low periodic perturbations, the lead for retractable pencil in bearing is produced under tired failure by shear, damping capacity
Drop.And lead for retractable pencil can also cause serious pollution to environment.
The content of the invention
The technical problem to be solved in the present invention is to provide made with the novel high polymer composite of lead metal similar nature
High-damping core, to replace the metal lead for retractable pencil of shock isolating pedestal, realizes the unleaded of new shock isolating pedestal.Obtained laminated rubber
Bearing have excellent damping capacity, equivalent level rigidity low and low land seismic wave under it is yielding the features such as, with lead metal core phase
Than the demand of bearing can be better met.
In order to solve the above technical problems, present invention employs following proposal：
1st, in terms of mass parts, new ekalead polymer composite, as matrix, is formulated as follows using nitrile rubber：
2nd, the present invention provides a kind of new ekalead polymer composite and prepares bearing core instead of original lead for retractable pencil, its feature
It is：Use acrylonitrile mass content for 26% butyronitrile N240S, acrylonitrile mass content be 34% butyronitrile N230S or third
The butyronitrile N220S that alkene nitrile mass content is 41% is matrix, organic clay of the addition with nano-lamellar structure.Organic clay with
The mass ratio of nitrile rubber is (60~150):100, preferable scope is (100~150):100.
3rd, the present invention provides a kind of new ekalead polymer composite and prepares bearing core instead of original lead for retractable pencil, its feature
It is：Sodium-based montmorillonite organises：In the round-bottomed flask that 10.00g sodium-based montmorillonites are poured into 1000mL, addition 400mL go from
Sub- water, magnetic agitation (300-500r/min) 1h stands 24h to complete swelling.By 5.0g intercalator octadecyl trimethyl bromines
Change ammonium (STAB) to add in small beaker, add 100mL deionized water dissolvings.The round-bottomed flask that will be equipped with the montmorillonite aqueous solution is put into
It is incubated and stirs into 80 DEG C of water-baths, then intercalant solution is added drop-wise in round-bottomed flask, dripped off in 35min, reacts 5h, cooling
Stand.Remove supernatant liquor and obtain white precipitate, deionized water washs suction filtration for several times, until filtrate mass percent is 1%
AgNO3Solution is detected without pale yellow precipitate.Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, is done
State organic clay.
4th, the present invention provides a kind of preparation method of shock mount ekalead polymer composite core, concrete technology step
Suddenly it is：
(1) ekalead polymer composite core preparation technology：Nitrile rubber is plasticated in two-roll mill room temperature, then
Organic clay is added, mixing is allowed to uniform.Hot-rolling mill mixing is used afterwards, and melting temperature is 95 ± 5 DEG C, and mixing time is
10 ± 3 DEG C, uniform rear slice is cooled to room temperature.Then kneaded on a mill, sequentially add Petropols, phenolic aldehyde tree
Fat, glass microballoon, activating agent, accelerator and vulcanizing agent, slice after mixing is uniform, obtain ekalead polymer composite sheet material.
(2) the ekalead polymer composite sheet material that step (1) is obtained is expelled in cylindrical mold cavities by extruder,
Injection temperature is 60 DEG C, pressure 15Mpa, pressurize 30min, cooling, die sinking, obtains preforming core.Vulcanize afterwards at 150 DEG C
Obtain ekalead polymer composite core.Core and bearing are assembled, ekalead polymer composite core damping branch is obtained
Seat.
Beneficial effects of the present invention
Organic clay and nitrile rubber are prepared for new macromolecule composite wood by the method for fusion intercalation by the present invention
Material, the material has the mechanical property close with lead metal, damping capacity, and stress is significantly improved under small strain effect.Will
It is made core and replaces lead for retractable pencil, and vertical rigidity, equivalent level rigidity and the damping ratio of prepared shock isolating pedestal meet actual bridge
The need for, comprehensive damping works well.The shock isolating pedestal core prepared compared to lead metal, ekalead polymer composite
Core has high-performance, pollution-free and low cost and other advantages.
Brief description of the drawings
Fig. 1 is the rubber support structural representation with lead for retractable pencil and ekalead polymer composite.Numeral mark meaning in figure
For：
The upper junction steel plates of 1-；2- upper sealing plates；3- connecting bolts；4- intermediate laminate rubber；5- steel plates；6- shear keys；7- lead
Core；Shrouding under 8-；Junction steel plate under 9-.
Fig. 2 be embodiment 3 in, ekalead macromolecule core rubber support 100% strain under hysteresis loop.
Embodiment
The raw materials used source of the present invention is as follows
Nitrile rubber, Japanese JSR companies production；The rubber compoundings such as stearic acid, zinc oxide, accelerator, age resistor, carbon black
Agent, Sheng Hua product of rubber and plastic Co., Ltd provides；Cumyl peroxide, the long Li Co., Ltd in Tianjin provides；Glass microballoon, Qin emperor
Dao Qinhuang glass microballoons Co., Ltd provides；Petropols, Puyang Xin Tian Chemical Co., Ltd.s provide；Phenolic resin, Tianjin
Huan Chang Science and Technology Ltd.s of city provide；Organic clay, laboratory synthesis, with Cetyltrimethylammonium bromide as intercalator,
Organic-treating is carried out to sodium-based montmorillonite.Cetyltrimethylammonium bromide, Nanjing chemical reagent limited company provides.
Below according to the formula and technique of new ekalead polymer composite in the present invention, by embodiment to the present invention
It is described further, but the invention is not restricted to these embodiments.
Embodiment 1-3
Ekalead polymer composite core is prepared according to table 1.Specific preparation technology is as follows：
The nitrile rubber formula of table 1
| Formula | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Nitrile rubber 220S | 100 parts | 100 parts | 100 parts |
| Organic clay | 60 | 100 | 150 |
| Zinc oxide | 5 parts | 5 parts | 5 parts |
| Stearic acid | 2 parts | 2 parts | 2 parts |
| Diphenylguanidine | 1.2 part | 1.2 part | 1.2 part |
| Diphenylguanidine TDM | 2.8 part | 2.8 part | 2.8 part |
| Petropols | 20 parts | 20 parts | 20 parts |
| Sulphur | 1.0 part | 1.0 part | 1.0 part |
| Cumyl peroxide | 1.0 part | 1.0 part | 1.0 part |
| Carbon black | 20 | 20 | 20 |
| Glass microballoon | 10 | 10 | 10 |
Sodium-based montmorillonite organises：：In the round-bottomed flask that 10.00g sodium-based montmorillonites are poured into 1000mL, 400mL is added
Deionized water, magnetic agitation (300-500r/min) 1h stands 24h to complete swelling.By 5.0g intercalator octadecyl front threes
Base ammonium bromide (STAB) is added in small beaker, adds 100mL deionized water dissolvings.It will be equipped with the round-bottomed flask of the montmorillonite aqueous solution
It is put into 80 DEG C of water-baths and is incubated and stirs, then intercalant solution is added drop-wise in round-bottomed flask, dripped off in 35min, reacts 5h,
Cooling and standings.Remove supernatant liquor and obtain white precipitate, deionized water washs suction filtration for several times, until filtrate is with mass percent
1% AgNO3Solution is detected without pale yellow precipitate.Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, is obtained
To dry state organic clay.
Ekalead polymer composite core preparation technology：Be 100/60 according to nitrile rubber 220S/ organic clays ratio,
100/100th, 100/150 ratio, nitrile rubber is plasticated in two-roll mill room temperature, organic clay is then added, and is allowed to mixed
Refining is uniform.Hot-rolling mill mixing is used afterwards, and melting temperature is 95 ± 5 DEG C, and mixing time is 10 ± 3 DEG C, to be mixed uniform
Slice is cooled to room temperature afterwards.Then kneaded on a mill, sequentially add Petropols, the glass microballoon (master of the product
It is borosilicate, model QH-700, pure white, particle diameter 80-250um, unit weight 0.08-0.10g/cm to want composition3, in following examples
Glass microballoon use the model), activating agent, accelerator, carbon black and vulcanizing agent, slice after mixing is uniform.Pass through extruder
It is expelled in cylindrical mold cavities, injection temperature is 60 DEG C, pressure 15Mpa, pressurize 30min, cooling, die sinking obtain preformation core
Material.Vulcanization obtains ekalead polymer composite core --- the NBR/ organic clays 100/ of different proportion at 150 DEG C afterwards
80th, NBR/ organic clays 100/100, NBR/ organic clays 100/150 (being designated as embodiment 1,2,3 successively).By obtained ekalead
Polymer composite core and bearing assembling, obtain ekalead polymer composite shock mount.
Weigh 7 grams of nitrile rubber elastomeric compound samples and time of scorch T10 and sulfurizing time T90 are determined on vulcameter.Will
Elastomeric compound is vulcanized on vulcanizing press by 150 DEG C × T90, sulfide stress：15MPa, the ekalead macromolecule being crosslinked
Composite.Mechanics Performance Testing is carried out to it, the performance of obtained ekalead polymer composite is shown in Table 2 and table 3.
Table 2
Table 3
From table 2 it can be seen that ekalead polymer composite hardness is higher, the rubber support being made, vertical direction can have
There is higher vertical rigidity, and stress is significantly improved under small strain effect, close to the stress at definite elongation of pure lead, can increase rubber
Equivalent level rigidity during glue bearing horizontal distortion, makes rubber support have more excellent anti-pressure ability.As organic clay is used
Organic clay is assembled to form rigidity very strong filler network in the increase of amount, composite, makes the stress-strain row of composite
To tend to be similar to plastics and staple fibre strength rubber composite, the vertical rigidity of composite is significantly improved.
The vertical rigidity standard requirement of Standard finished product bearing is 678 × (1 ± 30%) kN/mm, equivalent level rigidity
Standard requirement is 1.4 × (1 ± 15%) kN/mm, and the requirement of equivalent damping ratio standard is 22.3 × (1 ± 15%) kN/mm, by table 3
Understand, bearing properties meet bridge pad performance requirement within critical field.
Embodiment 4-6
Ekalead polymer composite core is prepared according to table 4, specific preparation technology is as follows：
The nitrile rubber formula of table 4
Sodium-based montmorillonite organises：：In the round-bottomed flask that 10.00g sodium-based montmorillonites are poured into 1000mL, 400mL is added
Deionized water, magnetic agitation (300-500r/min) 1h stands 24h to complete swelling.By 5.0g intercalator octadecyl front threes
Base ammonium bromide (STAB) is added in small beaker, adds 100mL deionized water dissolvings.It will be equipped with the round-bottomed flask of the montmorillonite aqueous solution
It is put into 80 DEG C of water-baths and is incubated and stirs, then intercalant solution is added drop-wise in round-bottomed flask, dripped off in 35min, reacts 5h,
Cooling and standings.Remove supernatant liquor and obtain white precipitate, deionized water washs suction filtration for several times, until filtrate is with mass percent
1% AgNO3Solution is detected without pale yellow precipitate.Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, is obtained
To dry state organic clay.
Ekalead polymer composite core preparation technology-according to nitrile rubber 230S/ organic clays ratio be 100/60,
100/100th, 100/150 ratio, nitrile rubber is plasticated in two-roll mill room temperature, organic clay is then added, and is allowed to mixed
Refining is uniform.Hot-rolling mill mixing is used afterwards, and melting temperature is 95 ± 5 DEG C, and mixing time is 10 ± 3 DEG C, to be mixed uniform
Slice is cooled to room temperature afterwards.Then kneaded on a mill, sequentially add Petropols, phenolic resin, activating agent, rush
Enter agent, carbon black and vulcanizing agent, slice after mixing is uniform.It is expelled to by extruder in cylindrical mold cavities, injection temperature is 60 DEG C,
Pressure 15Mpa, pressurize 30min, cooling, die sinking, obtain preforming core.Vulcanization obtains not year-on-year at 150 DEG C afterwards
Example ekalead polymer composite core --- NBR/ organic clays 100/60, NBR/ organic clays 100/100, NBR/ are organic
Clay 100/150 (is designated as embodiment 4,5,6) successively.
By obtained ekalead polymer composite core and vulcanization bearing assembling, obtain ekalead polymer composite and subtract
Shake bearing.
Weigh 7 grams of nitrile rubber elastomeric compound samples and time of scorch T10 and sulfurizing time T90 are determined on vulcameter.Will
Lamination elastomeric compound is vulcanized on vulcanizing press by 150 DEG C × T90, sulfide stress：The ekalead high score that 15MPa is crosslinked
Sub- composite.Mechanics Performance Testing is carried out to the composite of crosslinking, obtained ekalead polymer composite performance is shown in Table 5
With table 6.
Table 5
| Numbering | Shao's A hardness | 10% stretches/Mpa surely | 100% stretches/Mpa surely | Tensile strength/MPa |
| Embodiment 4 | 62 | 8.1 | 9.7 | 13.3 |
| Embodiment 5 | 64 | 8.3 | 10.2 | 14.5 |
| Embodiment 6 | 67 | 8.4 | 10.8 | 15.6 |
Table 6
As can be seen from Table 5, ekalead polymer composite hardness is higher, and the rubber support being made, vertical direction can have
There is higher vertical rigidity, and stress is significantly improved under small strain effect, close to the stress at definite elongation of pure lead, can increase rubber
Equivalent level rigidity during glue bearing horizontal distortion, makes rubber support have more excellent anti-pressure ability.As organic clay is used
Organic clay is assembled to form rigidity very strong filler network in the increase of amount, composite, makes the stress-strain row of composite
To tend to be similar to plastics and staple fibre strength rubber composite, the vertical rigidity of composite is significantly improved.
The vertical rigidity standard requirement of Standard finished product bearing is 678 × (1 ± 30%) kN/mm, equivalent level rigidity
Standard requirement is 1.4 × (1 ± 15%) kN/mm, and the requirement of equivalent damping ratio standard is 22.3 × (1 ± 15%) kN/mm, by table 6
Understand, bearing properties meet bridge pad performance requirement within critical field.
Embodiment 7-9
Ekalead polymer composite core is prepared according to table 7, specific preparation technology is as follows：
The nitrile rubber formula of table 7
| Formula | Embodiment 7 | Embodiment 8 | Embodiment 9 |
| Nitrile rubber 240S | 100 parts | 100 parts | 100 parts |
| Organic clay | 60 parts | 100 parts | 150 parts |
| Zinc oxide | 3 parts | 3 parts | 3 parts |
| Stearic acid | 1 part | 1 part | 1 part |
| Accelerant CZ | 2 parts | 2 parts | 2 parts |
| Petropols | 5 parts | 5 parts | 5 parts |
| Sulphur | 1.5 part | 1.5 part | 1.5 part |
| Cumyl peroxide | 2 parts | 2 parts | 2 parts |
| Carbon black | 15 | 15 | 15 |
| Phenolic resin | 5 | 5 | 5 |
| Glass microballoon | 15 | 15 | 15 |
Sodium-based montmorillonite organises：In the round-bottomed flask that 10.00g sodium-based montmorillonites are poured into 1000mL, addition 400mL is gone
Ionized water, magnetic agitation (300-500r/min) 1h stands 24h to complete swelling.By 5.0g intercalator octadecyl trimethyls
Ammonium bromide (STAB) is added in small beaker, adds 100mL deionized water dissolvings.It will be equipped with the round bottom flask of the montmorillonite aqueous solution
Enter and be incubated and stir into 80 DEG C of water-baths, then intercalant solution is added drop-wise in round-bottomed flask, dripped off in 35min, react 5h, it is cold
But stand.Remove supernatant liquor and obtain white precipitate, deionized water washs suction filtration for several times, until filtrate is with mass percent
1% AgNO3Solution is detected without pale yellow precipitate.Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, is obtained
To dry state organic clay.
Ekalead polymer composite core preparation technology-according to nitrile rubber 240S/ organic clays ratio be 100/60,
100/100th, 100/150 ratio, nitrile rubber is plasticated in two-roll mill room temperature, organic clay is then added, and is allowed to mixed
Refining is uniform.Hot-rolling mill mixing is used afterwards, and melting temperature is 95 ± 5 DEG C, and mixing time is 10 ± 3 DEG C, to be mixed uniform
Slice is cooled to room temperature afterwards.Then kneaded on a mill, sequentially add Petropols, phenolic resin, glass microballoon, work
Property agent, accelerator, carbon black and vulcanizing agent, slice after mixing is uniform.It is expelled to by extruder in cylindrical mold cavities, injection temperature
For 60 DEG C, pressure 15Mpa, pressurize 30min cool down, molded, obtain preforming core.Vulcanize afterwards at 150 DEG C and obtained
The ekalead polymer composite core of different proportion --- NBR/ organic clays 100/60, NBR/ organic clays 100/100,
NBR/ organic clays 100/150 (are designated as embodiment 7,8,9) successively.
By obtained ekalead polymer composite core and vulcanization bearing assembling, obtain ekalead polymer composite and subtract
Shake bearing.
Weigh 7 grams of nitrile rubber elastomeric compound samples and time of scorch T10 and sulfurizing time T90 are determined on vulcameter.Will
Lamination elastomeric compound is vulcanized on vulcanizing press by 150 DEG C × T90, sulfide stress：The ekalead high score that 15MPa is crosslinked
Sub- composite.Mechanics Performance Testing is carried out to the composite of crosslinking, obtained ekalead polymer composite performance is shown in Table 8
With table 9.
Table 8
| Numbering | Shao's A hardness | 10% stretches/Mpa surely | 100% stretches/Mpa surely | Tensile strength/MPa |
| Embodiment 7 | 60 | 7.9 | 9.2 | 13.6 |
| Embodiment 8 | 62 | 8.1 | 9.5 | 14.2 |
| Embodiment 9 | 64 | 8.4 | 9.8 | 15.1 |
Table 9
As can be seen from Table 8, ekalead polymer composite hardness is higher, and the rubber support being made, vertical direction can have
There is higher vertical rigidity, and stress is significantly improved under small strain effect, close to the stress at definite elongation of pure lead, can increase rubber
Equivalent level rigidity during glue bearing horizontal distortion, makes rubber support have more excellent anti-pressure ability.As organic clay is used
Organic clay is assembled to form rigidity very strong filler network in the increase of amount, composite, makes the stress-strain row of composite
To tend to be similar to plastics and staple fibre strength rubber composite, the vertical rigidity of composite is significantly improved.
The vertical rigidity standard requirement of Standard finished product bearing is 678 × (1 ± 30%) kN/mm, equivalent level rigidity
Standard requirement is 1.4 × (1 ± 15%) kN/mm, and the requirement of equivalent damping ratio standard is 22.3 × (1 ± 15%) kN/mm, by table 9
Understand, bearing properties meet bridge pad performance requirement within critical field.
Embodiment 10-12
Ekalead polymer composite core is prepared according to table 10, specific preparation technology is as follows：
The nitrile rubber formula of table 10
| Formula | Embodiment 10 | Embodiment 11 | Embodiment 12 |
| Nitrile rubber 240S | 100 parts | 100 parts | 100 parts |
| Organic clay | 60 parts | 100 parts | 150 parts |
| Zinc oxide | 3 parts | 3 parts | 3 parts |
| Stearic acid | 1 part | 1 part | 1 part |
| Accelerant CZ | 2 parts | 2 parts | 2 parts |
| Petropols | 5 parts | 5 parts | 5 parts |
| Sulphur | 1.5 part | 1.5 part | 1.5 part |
| Cumyl peroxide | 2 parts | 2 parts | 2 parts |
| Carbon black | 15 | 15 | 15 |
Sodium-based montmorillonite organises：In the round-bottomed flask that 10.00g sodium-based montmorillonites are poured into 1000mL, addition 400mL is gone
Ionized water, magnetic agitation (300-500r/min) 1h stands 24h to complete swelling.By 5.0g intercalator octadecyl trimethyls
Ammonium bromide (STAB) is added in small beaker, adds 100mL deionized water dissolvings.It will be equipped with the round bottom flask of the montmorillonite aqueous solution
Enter and be incubated and stir into 80 DEG C of water-baths, then intercalant solution is added drop-wise in round-bottomed flask, dripped off in 35min, react 5h, it is cold
But stand.Remove supernatant liquor and obtain white precipitate, deionized water washs suction filtration for several times, until filtrate is with mass percent
1% AgNO3Solution is detected without pale yellow precipitate.Gained white precipitate is transferred in beaker, and 24h is dried under the conditions of 80 DEG C, is obtained
To dry state organic clay.
Ekalead polymer composite core preparation technology-according to nitrile rubber 240S/ organic clays ratio be 100/60,
100/100th, 100/150 ratio, nitrile rubber is plasticated in two-roll mill room temperature, organic clay is then added, and is allowed to mixed
Refining is uniform.Hot-rolling mill mixing is used afterwards, and melting temperature is 95 ± 5 DEG C, and mixing time is 10 ± 3 DEG C, to be mixed uniform
Slice is cooled to room temperature afterwards.Then kneaded on a mill, sequentially add Petropols, activating agent, accelerator, carbon black and
Vulcanizing agent, slice after mixing is uniform.It is expelled to by extruder in cylindrical mold cavities, injection temperature is 60 DEG C, pressure 15Mpa,
Pressurize 30min, cooling, die sinking, obtains preforming core.Vulcanization obtains the ekalead height of different proportion at 150 DEG C afterwards
Molecular composite material core --- NBR/ organic clays 100/60, NBR/ organic clays 100/100, NBR/ organic clays 100/
150 (being designated as embodiment 10,11,12 successively).
By obtained ekalead polymer composite core and vulcanization bearing assembling, obtain ekalead polymer composite and subtract
Shake bearing.
Weigh 7 grams of nitrile rubber elastomeric compound samples and time of scorch T10 and sulfurizing time T90 are determined on vulcameter.Will
Lamination elastomeric compound is vulcanized on vulcanizing press by 150 DEG C × T90, sulfide stress：The ekalead high score that 15MPa is crosslinked
Sub- composite.Mechanics Performance Testing is carried out to the composite of crosslinking, obtained ekalead polymer composite performance is shown in Table 8
With table 9.
Table 11
| Numbering | Shao's A hardness | 10% stretches/Mpa surely | 100% stretches/Mpa surely | Tensile strength/MPa |
| Embodiment 10 | 61 | 8.3 | 9.1 | 13.9 |
| Embodiment 11 | 62 | 8.5 | 9.4 | 14.3 |
| Embodiment 12 | 66 | 8.7 | 9.6 | 15.4 |
Table 12
As can be seen from Table 11, ekalead polymer composite hardness is higher, and the rubber support being made, vertical direction can have
There is higher vertical rigidity, and stress is significantly improved under small strain effect, close to the stress at definite elongation of pure lead, can increase rubber
Equivalent level rigidity during glue bearing horizontal distortion, makes rubber support have more excellent anti-pressure ability.As organic clay is used
Organic clay is assembled to form rigidity very strong filler network in the increase of amount, composite, makes the stress-strain row of composite
To tend to be similar to plastics and staple fibre strength rubber composite, the vertical rigidity of composite is significantly improved.
The vertical rigidity standard requirement of Standard finished product bearing is 678 × (1 ± 30%) kN/mm, equivalent level rigidity
Standard requirement is 1.4 × (1 ± 15%) kN/mm, and the requirement of equivalent damping ratio standard is 22.3 × (1 ± 15%) kN/mm, by table 12
Understand, bearing properties meet bridge pad performance requirement within critical field.
Note：Rubber support finished product model 300 × 420 × 137G0.8 of J4Q used in this experiment, its internal structure is：Steel
Plate thickness 4mm × 9 layer, laminated rubber thickness 6mm × 10 layer, but the present invention is not only limited in the rubber support of this kind of structure.
Claims (4)
1. the shock isolating pedestal core of ekalead polymer composite, it is characterised in that in terms of mass parts, is formulated as follows：
2. core according to claim 1, it is characterised in that：Nitrile rubber use acrylonitrile mass content for 26% fourth
The butyronitrile N220S that the butyronitrile N230S or acrylonitrile mass content that nitrile N240S, acrylonitrile mass content are 34% are 41% is base
Body.
3. core according to claim 1, it is characterised in that：It is characterized in that organic clay is prepared using following methods：
In the round-bottomed flask that 10.00g sodium-based montmorillonites are poured into 1000mL, 400mL deionized waters are added, magnetic agitation 1h stands 24h
To complete swelling；5.0g intercalators Cetyltrimethylammonium bromide is added in small beaker, 100mL deionizations are added water-soluble
Solution；The round-bottomed flask that will be equipped with the montmorillonite aqueous solution is put into and is incubated and stirs into 80 DEG C of water-baths, then intercalant solution is added dropwise
Into round-bottomed flask, dripped off in 35min, react 5h, cooling and standings；Remove supernatant liquor and obtain white precipitate, deionization washing
Suction filtration is washed for several times, until filtrate mass fraction is 1% AgNO3Detection is without pale yellow precipitate；Gained white precipitate is transferred to burning
In cup, 24h is dried under the conditions of 80 DEG C, organic clay is obtained.
4. prepare the method for the core as described in claim 1-3 any one, it is characterised in that：Step is：
(1) nitrile rubber is plasticated in two-roll mill room temperature, then adds organic clay, be allowed to mixing uniform；Use afterwards
Hot-rolling mill mixing, melting temperature is 95 ± 5 DEG C, and mixing time is 10 ± 3 DEG C, and uniform rear slice is cooled to room temperature；Then
Kneaded on a mill, add Petropols, phenolic resin, glass microballoon, activating agent, accelerator, carbon black and vulcanizing agent,
Phenolic resin and glass microballoon can be also added without；Slice after mixing is uniform, obtains ekalead polymer composite sheet material；
(2) the ekalead polymer composite sheet material that step (1) is obtained is expelled in cylindrical mold cavities by extruder, injected
Temperature is 60 DEG C, pressure 15Mpa, pressurize 30min, cooling, die sinking, obtains preforming core；Vulcanize afterwards at 150 DEG C and obtain
Ekalead polymer composite core.
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