AU2020102700A4 - Novel high-damping isolation rubber composite material as well as preparation method and application thereof - Google Patents
Novel high-damping isolation rubber composite material as well as preparation method and application thereof Download PDFInfo
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Abstract
The present invention discloses a novel high-damping isolation rubber
composite material and a preparation method thereof. The composite material is
prepared by taking carboxy nitrile rubber xNBR as matrix rubber and taking a slide
graft copolymer SGC as a high damping phase by a method of combining simple
blending and reactive blending. The preparation method includes the following
steps: (1) plastically mixing the xNBR in an open mill, and adding the SGC to
prepare a rubber compound by a blending method; (2) transferring the rubber
compound into an internal mixer, adding a cross-linking agent, and dynamically
vulcanizing the SGC in the xNBR matrix by virtue of reactive blending; and (3)
then transferring the rubber compound into the open mill; adding a vulcanizing
agent; standing; and vulcanizing the xNBR in a plate vulcanizing machine. In the
present invention, the SGC is cross-linked by the reactive blending method so as to
become the high damping phase, so that the matrix rubber can maintain high
mechanical property, and damping capacity can be greatly increased, particularly
damping property in a low-temperature area. The novel high-damping rubber
composite material prepared in the present invention is particularly applicable to
isolation materials in the fields of automobiles, bridges, buildings and aviation.
Drawings of Description
2.0 - -- Reference example
-.- Embodiment 4
--- Embodiment 10
'.5
0.5
FIG. 1
1
Description
Drawings of Description
2.0 - -- Reference example -.- Embodiment 4 --- Embodiment 10
'.5
0.5
FIG. 1
Description
Technical Field
The present invention relates to a novel high-damping isolation rubber composite material as well as a preparation method and application thereof. The prepared novel rubber composite material may be applied to high-damping isolation rubber materials in the fields of automobiles, houses, bridges and buildings, and belongs to the technical field of preparation of rubber composite materials.
Background
Damping materials are materials that can convert mechanical vibration energy into thermal energy to dissipate so as to achieve the effects of shock absorption and noise reduction. At present, the damping materials are widely applied to various mechanical equipment and devices, and particularly the materials need to have high damping properties in the fields of isolation bearings at joints of automobiles, bridge bodies of bridges and abutments and isolation rubber bearings for earthquake protection. High-damping rubber is a novel high-damping material that newly develops from the damping material, and mainly absorbs external vibration by utilizing visco-elastic hysteresis of high polymers. A standard for evaluating damping intensity of a material is a damping factor (tan6). The damping factor tan6 of the high-damping material is required to be more than 0.3, and thus an effect of absorbing shock wave energy can be achieved. A working zone of the high-damping rubber is in a glass-transition temperature zone. A temperature range corresponding to tan>0.3 is a functional zone of the rubber serving as the damping material. Generally, the wider the temperature range of the functional
Description
zone is, the higher the tan6 value is, and the better the damping effect is. However, most of the rubber has a narrower functional zone, and particularly a high/low-temperature zone has poor low-temperature damping property; the damping factor tan6 is less than 0.3 at a temperature of about -10°C; an application requirement in winter in a certain region cannot be met; and applications in the engineering field are limited. Therefore, developing a high-performance rubber damping material with large loss factor and wide effective damping temperature range becomes a technical problem that urgently needs to be solved in the field.
Summary
A technical problem to be solved in the present invention is to provide a novel rubber composite material that can achieve high damping properties at high and low temperatures. High integrated mechanical properties of a rubber matrix are maintained, and the composite material is endowed with high damping properties. The present invention relates to a carboxy nitrile high-damping isolation rubber composite material and a preparation method thereof. Carboxy nitrile rubber with high tensile strength serves as a matrix so as to meet a high-strength requirement of a rubber support base; and a slide graft copolymer (SGC) is selected as a high damping phase for increasing high damping performance of the rubber in a wide temperature range. The isolation rubber composite material with high damping property and high mechanical property is prepared in a manner of combining dynamic reactive blending and simple mechanical blending. A purpose of the present invention is to provide a novel high-damping isolation rubber composite material that can achieve high damping properties at high and low temperatures. A second purpose of the present invention is to provide a preparation method of the novel high-damping isolation rubber composite material, which can prepare high-damping isolation rubber.
Description
A third purpose of the present invention is to provide applications of the novel high-damping isolation rubber composite material in fields of isolation rubber bearings, shock absorbers for automobiles and shockproof bearings for bridges. To solve the above technical problems, the present invention is realized as follows: The novel high-damping isolation rubber composite material provided by the present invention includes the following components in parts: matrix rubber 90-70 parts high-damping phase 10-30 parts activator 3-4 parts accelerant 1-3 parts anti-aging agent 1-3 parts vulcanizing agent I 5-20 parts vulcanizing agent II 1-3 parts. The parts are parts by mass. As a further description of the above solution, the matrix rubber is the carboxy nitrile rubber; and the high-damping phase is the SGC. As a further description of the above solution, the content of the SGC is 20 parts by mass. As a further description of the above solution, the vulcanizing agent I is a compound with isocyanate groups; and the vulcanizing agent II is dicumyl peroxide. As a further description of the above solution, the compound with isocyanate groups is phenylene diisocynate (TDI), hexamethylene diisocyanate (HDI), toluene-2,4-diisocyanate (MDI) or 4,4'-dicyclohexyl methylene diisocyanate (HMDI). The preparation method of the novel high-damping isolation rubber composite material provided by the present invention includes the following steps:
Description
step 1, plastically mixing matrix rubber in an open mill at a room temperature; adding a high-damping phase in set parts by mass for uniform mixing; and adding an activator, an accelerant and an anti-aging agent to prepare a rubber compound; step 2, transferring the rubber compound prepared in the step 1 into an internal mixer for blending; adding a vulcanizing agent I; and dynamically vulcanizing the high-damping phase in the matrix rubber, so that the high-damping phase is broken while cross-linking, and formed cross-linked high-damping phase particles are dispersed in the matrix nitrile rubber; step 3, transferring the rubber compound treated in the step 2 into the open mill; adding a vulcanizing agent II; thinning and discharging; standing; and vulcanizing the rubber compound in a plate vulcanizing machine. As a further description of the above solution, in the step 2, the vulcanizing agent I is added after the rubber compound is blended in the internal mixer under conditions of a rotation speed of 80 rpm and a temperature of 120°C for 1 min; and the high-damping phase is dynamically vulcanized in the matrix rubber for 5 min. As a further description of the above solution, in the step 3, a vulcanizing temperature of vulcanization is 160°C; a pressure is 10 Mpa; and vulcanization time is 15 min. The present invention further provides an application of the novel high-damping isolation rubber composite material in fields such as isolation rubber bearings, shock absorbers for automobiles and shockproof bearings for bridges. The present invention has beneficial effects as follows: according to the novel high-damping isolation rubber composite material provided by the present invention, the carboxy nitrile rubber serves as the matrix rubber material; the SGC serves as the high damping phase; and addition amounts of additives such as the vulcanizing agents, the accelerant, the activator and the anti-aging agent are controlled; and therefore, the present invention has high damping factor and wide effective damping temperature range, and damping vibration attenuation properties
Description
and mechanical strength are not decreased along with temperature ranges. The temperature of the high-damping characteristic (tan6>0.3) may be as low as -43.5°C. Thus, the novel high-damping isolation rubber prepared in the present invention may be applied to the fields of the isolation rubber bearings, shock absorbers for automobiles and shockproof bearings for bridges.
Description of Drawings Fig. 1 is a damping curve of a rubber material prepared in reference example, embodiment 4 and embodiment 10.
Detailed Description
The present invention will be further described below in combination with drawings and specific embodiments. However, the present invention is not limited to these embodiments, and further includes corresponding changes made by those skilled in the art within the scope disclosed by the present invention. A high-damping phase used in embodiments is a slide graft copolymer (SGC), but not limited to this. Content of the SGC is 10-30 parts by mass, but is not limited to this ratio. Used carboxy nitrile rubber is purchased from Nippon Paint and has a brand of 230s. The used SGC is purchased from Tianjin Weirui Supramolecular Technology Co., Ltd., and has a commodity code of A1000, CAS. No 928045-45-8. Reference example 1 is a pure carboxy nitrile rubber blank control sample; in embodiments 1, 2, 3, 4 and 5, mass ratios of the carboxy nitrile rubber to the SGC are respectively variables such as 95/5, 90/10, 85/15, 80/20 and 70/30; a vulcanizing agent I is 4,4'-dicyclohexyl methylene diisocyanate (HMDI) in an amount of 5 parts, and the amounts of a vulcanizing agent II DCP are only 1, 2.5 and 3 parts; in embodiments 6, 7 and 8, according to the mass ratio 80/20 of the carboxy nitrile rubber to the SGC, the amounts of the vulcanizing agent II dicumyl
Description
peroxide (DCP) are 2.5 and 3 parts, and types of the vulcanizing agent I are respectively variables such as MDI, TDI and HDI; and in embodiments 9, 10 and 11, according to the mass ratio 80/20 of the carboxy nitrile rubber to the SGC, the vulcanizing agent I is 2 parts of HMDI, the vulcanizing agent II is the DCP, and the amounts of the HMDI are respectively variables such as 10, 15 and 25 parts. Reference example 1 100 g of carboxy nitrile rubber was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; the following components were added in sequence to be uniformly mixed: 2 g of an activator zinc oxide, 2 g of an activator stearic acid, 1 g of an accelerant tetramethyl thiuram disulfide (accelerant TMTD for short), 1 g of an accelerant N-cyclohexyl-2-benzothiazole-sulfonamide (accelerant CZ for short), 1 g of an accelerant ethylene thiourea (accelerant Na-22 for short), 3 g of an anti-aging agent N-isopropyl-N'-phenylenediamine (anti-aging agent 401NA for short), and 3 g of a vulcanizing agent II dicumyl peroxide (DCP), and a rubber compound was prepared; the rubber compound was vulcanized on a plate vulcanizing machine for 12 minutes after 12 hours of standing, wherein a vulcanizing temperature was 160C, and a pressure was 10 Mpa; and carboxy nitrile rubber sheets were prepared. Embodiment 1 (1) 95 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 5 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 2 g of an activator zinc oxide, 2 g of an activator stearic acid, 1 g of an accelerant TMTD, 1 g of an accelerant CZ, 1 g of an accelerant Na-22 and 3 g of an anti-aging agent 4010NA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120 0C for 1min; 5 g of
Description
a vulcanizing agent I, i.e., 4,4'-dicyclohexyl methylene diisocyanate (HMDI) was added; the SGC was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 3 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min, thereby obtaining the product. Embodiment 2 (1) 90 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 10 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 2 g of an activator zinc oxide, 2 g of an activator stearic acid, 1 g of an accelerant TMTD, 1 g of an accelerant CZ, 1 g of an accelerant Na-22 and 3 g of an anti-aging agent 401ONA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 5 g of a vulcanizing agent I HMDI was added; the SGC was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 3 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Embodiment 3
Description
(1) 85 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 15 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 2 g of an activator zinc oxide, 2 g of an activator stearic acid, 1 g of an accelerant TMTD, 1 g of an accelerant CZ, 1 g of an accelerant Na-22 and 2.5 g of an anti-aging agent 4010NA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 5 g of a vulcanizing agent I HMDI was added; the SGC was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 2.5 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Embodiment 4 (1) 80 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 20 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 1.5 g of an activator zinc oxide, 1.5 g of an activator stearic acid, 1 g of an accelerant TMTD, 0.5 g of an accelerant CZ, 0.5 g of an accelerant Na-22 and 2 g of an anti-aging agent 401ONA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 5 g of a vulcanizing agent I HMDI was added; the SGC was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix;
Description
(3) the rubber compound was transferred into the open mill; 2.5 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Embodiment 5 (1) 70 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 30 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 1.5 g of an activator zinc oxide, 1.5 g of an activator stearic acid, 0.4 g of an accelerant TMTD, 0.3 g of an accelerant CZ, 0.3 g of an accelerant Na-22 and 1 g of an anti-aging agent 401ONA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 5 g of a vulcanizing agent I HMDI was added; the SGC was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 1 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Detection results of the novel high-damping isolation rubber composite material prepared in reference example and embodiments 1-5 are shown in Table 1. For the rubber composite material added with the high-damping phase SGC, stretching strength is decreased, and elongation at break is increased. Tensile strength of the rubber composite material is more than 10 MPa, the elongation at break is more than 500%, and mechanical property requirements of rubber
Description
materials for isolation bearings are met. The added high-damping phase SGC has an effect of obviously increasing damping of the rubber composite material. As the mass parts of the SGC are increased, a temperature range of the loss factor tan6>0.3 is gradually increased, and an increase amplitude of a low-temperature zone is large, which indicates that the composite material has excellent damping and shock absorption properties and is particularly applicable to use at low temperature. Table 1: Performance table of rubber materials prepared in reference 1 and embodiments 1, 2, 3, 4 and 5
Test Reference example 1 Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5
100% stretching 0.75 0.53 0.42 0.39 0.35 0.31
300% stretching 2.15 1.61 1.55 1.43 1.35 1.12
Tensile strength 21.5 15.7 14.2 13.1 12.0 11.2
Elongation at break % 320 515 523 538 552 560
Hardness 63 48 45 42 36 28
tan6S0.3 temperature range -19.8-10.1 -21.2-11.4 -25.2-13.7 -30.5-16.5 -37.1-18.2 -36.5-17.5
tan6 (20 C) 0.17 0.20 0.22 0.25 0.33 0.31
Embodiment 6 (1) 80 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 20 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 1.5 g of an activator zinc oxide, 1.5 g of an activator stearic acid, 1 g of an accelerant TMTD, 0.5 g of an accelerant CZ, 0.5 g of an accelerant Na-22 and 2 g of an anti-aging agent 401ONA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 5 g of a vulcanizing agent I, i.e., toluene-2,4-diisocyanate (MDI), was added; the SGC
Description
was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 2.5 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Embodiment 7 (1) 80 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 20 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 1.5 g of an activator zinc oxide, 1.5 g of an activator stearic acid, 1 g of an accelerant TMTD, 0.5 g of an accelerant CZ, 0.5 g of an accelerant Na-22 and 2.5 g of an anti-aging agent 401ONA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 15 g of a vulcanizing agent I, i.e., phenylene diisocynate (TDI), was added; the SGC was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 2.5 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Embodiment 8
Description
(1) 80 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 20 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 1.5 g of an activator zinc oxide, 1.5 g of an activator stearic acid, 1 g of an accelerant TMTD, 0.5 g of an accelerant CZ, 0.5 g of an accelerant Na-22 and 2.5 g of an anti-aging agent 401ONA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 20 g of a vulcanizing agent I, i.e., hexamethylene diisocyanate (HDI), was added; the SGC was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 2.5 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Detection results of the high-damping rubber material prepared in embodiments 6, 7 and 8 are shown in Table 2. Table 2: Performance table of rubber materials prepared in embodiments 6, 7 and 8
Test Embodiment 6 Embodiment 7 Embodiment 8
100% stretching 0.65 0.53 0.52
300% stretching 2.05 1.89 1.95
Tensile strength 19.2 18.7 16.2
Elongation at break % 530 555 563
Hardness 34 38 35
tan6 0.3 temperature range -20.7-11.2 -21.5-12.6 -22.2-12.8
tan6 (20 °C) 0.18 0.21 0.23
Description
Embodiment 9 (1) 80 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 20 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 1.5 g of an activator zinc oxide, 1.5 g of an activator stearic acid, 1 g of an accelerant TMTD, 0.5 g of an accelerant CZ, 0.5 g of an accelerant Na-22 and 2 g of an anti-aging agent 401ONA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 10 g of a vulcanizing agent I HMDI was added; the SGC was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 2 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Embodiment 10 (1) 80 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 20 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 1.5 g of an activator zinc oxide, 1.5 g of an activator stearic acid, 1 g of an accelerant TMTD, 0.5 g of an accelerant CZ, 0.5 g of an accelerant Na-22 and 0.9 g of an anti-aging agent 401ONA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 15 g of a vulcanizing agent I HMDI was added; the SGC was dynamically vulcanized in
Description
the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 2 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Embodiment 11 (1) 80 g of xNBR was plastically mixed on an open mill at a room temperature for 1 minute, and subjected to roll covering; 20 g of SGC was added for mixing for 1 min; and the following components were added in sequence: 1.5 g of an activator zinc oxide, 1.5 g of an activator stearic acid, 1 g of an accelerant TMTD, 0.5 g of an accelerant CZ, 0.5 g of an accelerant Na-22 and 2 g of an anti-aging agent 401ONA; (2) a rubber compound of the xNBR and the SGC was transferred into an internal mixer and blended at a rotation speed of 80 rpm at 120°C for 1 min; 20 g of a vulcanizing agent I HMDI was added; the SGC was dynamically vulcanized in the xNBR matrix for 5 min; the SGC was broken while cross-linking, and formed cross-linked SGC particles were dispersed in the xNBR matrix; (3) the rubber compound was transferred into the open mill; 2 g of a vulcanizing agent II DCP was added; the rubber compound was thinned for discharging; and the xNBR was vulcanized in a plate vulcanizing machine after standing, wherein a vulcanizing temperature was 160°C, and a pressure was 10 Mpa; and vulcanization was performed for 12 min. Detection results of the high-damping rubber material prepared in embodiments 9, 10 and 11 are shown in Table 3. Table 3: Performance table of rubber materials prepared in embodiments 9, 10 and 11
Description
Test Embodiment 9 Embodiment 10 Embodiment 11
100% stretching 0.46 0.45 0.42
300% stretching 2.11 2.35 2.34
Tensile strength 16.3 16.0 16.2
Elongation at break % 592 588 510
Hardness 37 36 36
tan6 0.3 temperature range -38.2-19.2 -43.5-24.2 -35.2-22.8
tan6 (20 C) 0.34 0.57 0.43
Through analysis of the detection results of the novel high-damping isolation rubber composite material prepared in embodiments 1-11, application requirements for physical and mechanical properties in the fields of the isolation rubber bearings, shock absorbers for automobiles and shockproof bearings for bridges are met in aspects of tensile strength, elongation at break and the like. The lowest temperature of the damping factor tan6>0.3 may be -43.5°C; and the application requirements of the prepared novel high-damping isolation rubber composite material for the low-temperature damping property in the fields of the isolation rubber bearings, shock absorbers for automobiles and shockproof bearings for bridges can be met. The above describes preferred specific embodiments of the present invention in detail. It shall be understood that, many modifications and changes can be made by those ordinary skilled in the art without contributing creative labor in accordance with the concept of the present invention. Therefore, the technical solutions obtained by those skilled in the art in accordance with the concept of the present invention by virtue of logical analysis, reasoning or limited experiments on the basis of the prior art shall be included in the protection scope determined by claims.
Claims (9)
1. A novel high-damping isolation rubber composite material, comprising the following components in parts: matrix rubber 95-70 parts high-damping phase 5-30 parts activator 3-4 parts accelerant 1-3 parts anti-aging agent 1-3 parts vulcanizing agent I 5-20 parts vulcanizing agent II 1-3 parts wherein the parts are parts by mass.
2. The novel high-damping isolation rubber composite material according to claim 1, wherein the matrix rubber is carboxy nitrile rubber; and the high-damping phase is a slide graft copolymer (SGC).
3. The novel high-damping isolation rubber composite material according to claim 2, wherein the content of SGC is 20 parts by mass.
4. The novel high-damping isolation rubber composite material according to claim 1, wherein the vulcanizing agent I is a compound with isocyanate groups; and the vulcanizing agent II is dicumyl peroxide.
5. The novel high-damping isolation rubber composite material according to claim 4, wherein the compound with isocyanate groups is phenylene diisocynate (TDI), hexamethylene diisocyanate (HDI), toluene-2,4-diisocyanate (MDI) or 4,4'-dicyclohexyl methylene diisocyanate (HMDI).
6. A preparation method of the novel high-damping isolation rubber composite material of any one of claims 1-5, comprising the following steps: step 1, plastically mixing matrix rubber in an open mill at a room temperature; adding a high-damping phase in set parts by mass for uniform mixing; and adding an activator, an accelerant and an anti-aging agent to prepare a rubber compound;
Claims
step 2, transferring the rubber compound prepared in the step 1 into an internal mixer for blending; adding a vulcanizing agent I; and dynamically vulcanizing the high-damping phase in the matrix rubber, so that the high-damping phase is broken while cross-linking, and formed cross-linked high-damping phase particles are dispersed in the matrix nitrile rubber; step 3, transferring the rubber compound treated in the step 2 into the open mill; adding a vulcanizing agent II; thinning and discharging; standing; and vulcanizing the rubber compound in a plate vulcanizing machine.
7. The preparation method of the novel high-damping isolation rubber composite material according to claim 6, wherein in the step 2, the vulcanizing agent I is added after the rubber compound is blended in the internal mixer under conditions of a rotation speed of 80 rpm and a temperature of 120°C for 1 min; and the high-damping phase is dynamically vulcanized in the matrix rubber for 5 min.
8. The preparation method of the novel high-damping isolation rubber composite material according to claim 6, wherein in the step 3, a vulcanizing temperature of vulcanization is 160°C; a pressure is 10 Mpa; and vulcanization time is 15 min.
9. An application of the novel high-damping isolation rubber composite material of claim 1 in fields of isolation rubber bearings, shock absorbers for automobiles and shockproof bearings for bridges.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116218104A (en) * | 2023-03-11 | 2023-06-06 | 浙江圆通新材料有限公司 | Preparation method of graphene-based fluororubber sealing ring for plasma-resistant semiconductor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116218104A (en) * | 2023-03-11 | 2023-06-06 | 浙江圆通新材料有限公司 | Preparation method of graphene-based fluororubber sealing ring for plasma-resistant semiconductor |
| CN116218104B (en) * | 2023-03-11 | 2024-06-04 | 浙江圆通新材料有限公司 | Preparation method of graphene-based fluororubber sealing ring for plasma-resistant semiconductor |
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