CN117467278A - High-damping silicon rubber and preparation method thereof - Google Patents
High-damping silicon rubber and preparation method thereof Download PDFInfo
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- CN117467278A CN117467278A CN202311435008.6A CN202311435008A CN117467278A CN 117467278 A CN117467278 A CN 117467278A CN 202311435008 A CN202311435008 A CN 202311435008A CN 117467278 A CN117467278 A CN 117467278A
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 96
- 238000013016 damping Methods 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000004945 silicone rubber Substances 0.000 claims abstract description 81
- -1 polysiloxane Polymers 0.000 claims abstract description 50
- 229920000642 polymer Polymers 0.000 claims abstract description 46
- 239000000178 monomer Substances 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 13
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 13
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 17
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 17
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 11
- 239000004327 boric acid Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229920002545 silicone oil Polymers 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920001843 polymethylhydrosiloxane Polymers 0.000 claims description 3
- 229920005554 polynitrile Polymers 0.000 claims description 3
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 20
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000002441 reversible effect Effects 0.000 abstract description 3
- 229920006037 cross link polymer Polymers 0.000 abstract description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 12
- 238000003756 stirring Methods 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 5
- 238000005119 centrifugation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/14—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of high-molecular damping materials, and provides high-damping silicon rubber and a preparation method thereof. The preparation raw materials of the high damping silicone rubber provided by the invention comprise a silicone rubber monomer, a cross-linking agent, a polymer containing secondary valence bonds and a linear polymer fluid. The silicone rubber provided by the invention comprises a permanently chemically crosslinked polymer network, so that the capability of the silicone rubber material for maintaining shape and reversible deformation is ensured; meanwhile, the polymer containing secondary valence bonds and the linear polymer fluid provide two energy dissipation mechanisms for the silicone rubber material, so that the silicone rubber material has excellent damping performance in a wide frequency band or temperature range. In addition, the silicone rubber provided by the invention contains three materials which are polysiloxane polymers, so that the silicone rubber has good compatibility. In conclusion, the silicon rubber provided by the invention belongs to a high-performance silicon rubber damping material with high damping, wide temperature range and wide frequency band, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of high-molecular damping materials, in particular to high-damping silicone rubber and a preparation method thereof.
Background
Polymeric damping materials are a class of functional materials that can take advantage of their unique viscoelasticity, i.e., exhibit both solid elasticity and liquid viscosity, thereby converting vibrational energy into thermal energy for dissipation. At present, the high molecular damping material is widely used for damping and noise reduction in various fields such as aerospace, construction, electronic devices and the like.
The silicone rubber is a material composed of polysiloxane three-dimensional network, and the excellent performances of temperature resistance, aging resistance, biocompatibility and the like lead the silicone rubber to be a polymer damping material with wide application prospect. Conventional methods typically prepare damping silicone rubber (China Elastomerics,2018,28 (6), 63-67) by introducing other carbon-based components such as styrene-butadiene rubber or by compounding with inorganic nanomaterials. However, these design strategies have difficulty in greatly increasing the damping coefficient and effective damping temperature range of silicone rubber and can result in the impact of the damping silicone rubber composition uniformity and its own performance characteristics. Therefore, there is an urgent need to develop a silicone rubber material having high damping properties.
Disclosure of Invention
In view of the above, the invention provides a high damping silicone rubber and a preparation method thereof. The high-damping silicone rubber provided by the invention has higher damping performance in a wide frequency band or temperature range, and the components have good compatibility, so that the defects of poor damping performance, poor component compatibility and the like of the traditional silicone rubber can be overcome.
In order to achieve the above object, the present invention provides the following technical solutions:
the high-damping silicone rubber is prepared from the following raw materials in parts by mass: 14-21 parts of silicone rubber monomer, 2-3 parts of cross-linking agent, 28-56 parts of polymer containing secondary valence bond and 28-56 parts of linear polymer fluid; the polymer containing secondary valence bonds is polyborosiloxane; the linear polymer fluid is a linear polysiloxane.
Preferably, the weight average molecular weight of the polyborosiloxane is 500-6000.
Preferably, the preparation method of the polyborosiloxane comprises the following steps: boric acid, an alcohol solvent and hydroxyl-terminated polydimethylsiloxane are mixed for reaction, so that polyborosiloxane is obtained.
Preferably, the linear polymer fluid has a weight average molecular weight of 70000 to 260000.
Preferably, the linear polysiloxane comprises one or more of polydimethylsiloxane, polyphenylmethylsiloxane, polymethylvinylsiloxane, polymethylhydrosiloxane and polydiethylsiloxane.
Preferably, the cross-linking agent comprises one or more of hydrogen-containing silicone oil, ethyl orthosilicate, methyltriethoxysilane and methyltrimethoxysilane.
Preferably, the silicone rubber monomer is a room temperature vulcanized silicone rubber monomer or a high temperature vulcanized silicone rubber monomer.
Preferably, the room temperature vulcanizing silicone rubber monomer comprises one or more of polymethylvinylsiloxane, vinylsiloxane, hydroxy-terminated polydimethylsiloxane, dihydroxypolydimethyldiphenylsiloxane, and polynitrile ethylmethylsiloxane.
The invention also provides a preparation method of the high-damping silicon rubber, which comprises the following steps:
and mixing and curing the silicone rubber monomer, the cross-linking agent, the polymer containing the secondary valence bond and the linear polymer fluid to obtain the high-damping silicone rubber.
Preferably, the curing temperature is 60-100 ℃ and the curing time is 6-12 h.
The invention provides high-damping silicon rubber which is prepared from the following raw materials in parts by mass: 14-21 parts of silicone rubber monomer, 2-3 parts of cross-linking agent, 28-56 parts of polymer containing secondary valence bond and 28-56 parts of linear polymer fluid; the polymer containing secondary valence bonds is polyborosiloxane; the linear polymer fluid is a linear polysiloxane. The high damping silicone rubber provided by the invention comprises a permanently chemically crosslinked polymer network, so that the capability of maintaining the shape and reversible deformation of the silicone rubber material is ensured; the secondary bond containing polymer and the linear polymer fluid simultaneously provide two energy dissipation mechanisms for the silicone rubber material, namely reversible formation and dissociation of the dynamic secondary bonds and relaxation of the high viscosity linear polymer fluid. Wherein,the relaxation behavior of dynamic secondary bonds occurs in the low frequency band (-10) 0 rad/s) while relaxation of the high viscosity linear polymer fluid allows the material to relax at higher frequency bands>10 rad/s) exhibit significant dissipative properties. Thus, the combination of the two dissipation mechanisms organically allows the silicone rubber material of the present invention to exhibit excellent damping properties over a wide frequency band or temperature range. The results of the examples show that the silicone rubber prepared according to the invention is in the temperature range of-30 to 120℃or 10 ℃ -2 ～10 2 The damping coefficient is above 0.3 in the frequency range of rad/s. In addition, the silicone rubber provided by the invention contains three materials which are polysiloxane polymers, so that the silicone rubber has good compatibility and uniform chemical composition.
In summary, the silicon rubber provided by the invention solves the problems of poor damping performance, narrow effective temperature range, narrow effective frequency range and poor component compatibility of the traditional damping silicon rubber, and belongs to a high-performance silicon rubber damping material with high damping, wide temperature range and wide frequency band.
The invention also provides a preparation method of the high-damping silicon rubber, which is simple in process, low in cost and easy to realize large-scale preparation.
Drawings
FIG. 1 is a plot of modulus versus angular frequency for the high damping silicone rubber prepared in example 3;
fig. 2 is a loss factor-angular frequency curve of the high damping silicone rubber prepared in example 3.
Detailed Description
The invention provides high-damping silicon rubber which is prepared from the following raw materials in parts by mass: 14-21 parts of silicone rubber monomer, 2-3 parts of cross-linking agent, 28-56 parts of polymer containing secondary valence bond and 28-56 parts of linear polymer fluid; the polymer containing secondary valence bonds is polyborosiloxane; the linear polymer fluid is a linear polysiloxane.
All the raw materials used in the present invention are commercially available unless otherwise specified.
The preparation raw materials of the high damping silicone rubber provided by the invention comprise 14-21 parts by weight of silicone rubber monomer, preferably 14-20 parts by weight. The present invention is not particularly limited in the kind of the silicone rubber monomer, and various kinds of room temperature vulcanized or high temperature vulcanized silicone rubber monomers (specifically, silicone rubber monomers vulcanized at a temperature higher than room temperature) in the art can be employed. In order to achieve high damping performance and in view of the mildness of reaction conditions and simplicity of preparation process, the present invention preferably employs room temperature vulcanized silicone rubber monomer; the room temperature vulcanizing silicone rubber monomer preferably comprises one or more of polymethylvinylsiloxane, vinylsiloxane, hydroxy-terminated polydimethylsiloxane, dihydroxypolydimethyldiphenylsiloxane, and polynitrile ethylmethylsiloxane.
The preparation raw materials of the high damping silicone rubber provided by the invention comprise 2-3 parts of cross-linking agent by mass part of the silicone rubber monomer. In the present invention, the crosslinking agent preferably includes one or more of hydrogen-containing silicone oil, tetraethyl orthosilicate, methyltriethoxysilane, and methyltrimethoxysilane.
The preparation raw materials of the high damping silicone rubber provided by the invention comprise 28-56 parts of polymer containing secondary valence bonds, preferably 30-50 parts, by mass of the silicone rubber monomer. In the invention, the secondary bond-containing polymer is polyborosiloxane, and the weight average molecular weight of the polyborosiloxane is preferably 500-6000; the preparation method of the polyborosiloxane preferably comprises the following steps: mixing boric acid, an alcohol solvent and hydroxyl-terminated polydimethylsiloxane for reaction to obtain polyborosiloxane; the alcohol solvent is preferably methanol; the volume ratio of the boric acid to the alcohol solvent is preferably 1g (30-50 mL), more preferably 1g:40mL; the weight average molecular weight of the hydroxyl-terminated polydimethylsiloxane is preferably 3000 to 6000, more preferably 4200; the mass ratio of boric acid to hydroxyl-terminated polydimethylsiloxane is preferably 1: (20-80), more preferably 1:40; the temperature of the reaction is preferably room temperature, and the time is preferably 1 to 4 hours, more preferably 2 hours; the reaction is preferably carried out under stirring conditions, the rotational speed of the stirring preferably being 800rpm; in a specific embodiment of the present invention, boric acid is preferably dissolved in methanol to obtain a boric acid solution, and then hydroxy-terminated polydimethylsiloxane is added to the boric acid solution for reaction. After the reaction, the reaction mixture obtained is preferably centrifuged to obtain the polyborosiloxane, and the rotation speed of the centrifugation is preferably 5000rpm.
The preparation raw materials of the high damping silicone rubber provided by the invention comprise 28-56 parts of linear polymer fluid, preferably 30-50 parts by mass of the silicone rubber monomer; the linear polymer fluid is a linear polysiloxane; the linear polysiloxane is linear polysiloxane which keeps liquid state at room temperature; the linear polymer fluid preferably has a weight average molecular weight of 70000 to 260000, more preferably 100000 ～ 210000; the linear polysiloxane preferably comprises one or more of polydimethylsiloxane, polyphenylmethylsiloxane, polymethylvinylsiloxane, polymethylhydrosiloxane and polydiethylsiloxane.
The invention also provides a preparation method of the high-damping silicon rubber, which comprises the following steps:
and mixing and curing the silicone rubber monomer, the cross-linking agent, the polymer containing the secondary valence bond and the linear polymer fluid to obtain the high-damping silicone rubber.
The invention preferably firstly uniformly stirs the silicone rubber monomer, the cross-linking agent, the polymer containing secondary valence bonds and the linear polymer fluid to form a homogeneous mixed prepolymer solution, and then the obtained mixed prepolymer solution is poured into a mould to be solidified under the heating condition.
In the present invention, the curing temperature is preferably 60 to 100 ℃, more preferably 60 to 80 ℃, and the curing time is preferably 6 to 12 hours, more preferably 8 to 12 hours; demoulding after curing is finished, and thus obtaining the solid high-damping silicone rubber.
The following description of the embodiments of the present invention will clearly and fully describe the technical solutions of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The preparation methods of the polyborosiloxanes used in the following examples and comparative examples are as follows: 1g of boric acid was dissolved in 40ml of methanol to form a transparent boric acid solution, and then 40g of a hydroxyl-terminated polydimethylsiloxane having a weight average molecular weight of 4200 was added to the boric acid solution, followed by continuous stirring for 2 hours at a stirring speed of 800rpm, and after completion of the reaction, centrifugal separation (centrifugation at 5000rpm for 5 minutes) was performed to obtain a polyborosiloxane.
Comparative example 1 omitting the polymers containing secondary valences
(1) Weighing and proportioning the raw materials according to the weight parts, mixing, and uniformly stirring to form a homogeneous mixed prepolymerization liquid; wherein, the raw materials are as follows by mass: 72 parts of linear polydimethylsiloxane with weight average molecular weight of 140000, 28 parts of polymethyl vinyl siloxane with weight average molecular weight of 25000 and 2.8 parts of hydrogen-containing silicone oil.
(2) And (3) pouring the mixed prepolymer liquid obtained in the step (1) into a mold, and reacting for 12 hours at the heating temperature of 60 ℃ to obtain the high-damping silicone rubber.
Comparative example 2 omitted the linear polymer fluid
(1) Weighing and proportioning the raw materials according to the weight parts, mixing, and uniformly stirring to form a homogeneous mixed prepolymerization liquid; wherein, the raw materials are as follows by mass: 84 parts of polyborosiloxane, 14 parts of polymethylvinylsiloxane with weight-average molecular weight of 25000 and 2.8 parts of hydrogen-containing silicone oil.
(2) And (3) pouring the mixed prepolymer liquid obtained in the step (1) into a mold, and reacting for 12 hours at the heating temperature of 60 ℃ to obtain the high-damping silicone rubber.
Example 1
(1) Weighing and proportioning the raw materials according to the weight parts, mixing, and uniformly stirring to form a homogeneous mixed prepolymerization liquid; wherein, the raw materials are as follows by mass: 56 parts of linear polydimethylsiloxane with weight average molecular weight of 140000, 28 parts of polyborosiloxane, 14 parts of polymethyl vinyl siloxane with weight average molecular weight of 25000 and 2.8 parts of hydrogen-containing silicone oil.
(2) And (3) pouring the mixed prepolymer liquid obtained in the step (1) into a mold, and reacting for 12 hours at the heating temperature of 60 ℃ to obtain the high-damping silicone rubber.
Example 2
(1) Weighing and proportioning the raw materials according to the weight parts, mixing, and uniformly stirring to form a homogeneous mixed prepolymerization liquid; wherein, the raw materials are as follows by mass: 56 parts of linear polydimethylsiloxane with molecular weight of 200000, 28 parts of polyborosiloxane, 14 parts of polymethyl vinyl siloxane with weight average molecular weight of 25000 and 2.8 parts of hydrogen-containing silicone oil.
(2) And (3) pouring the mixed prepolymer liquid obtained in the step (1) into a mold, and reacting for 12 hours at the heating temperature of 60 ℃ to obtain the high-damping silicone rubber.
Example 3
(1) Weighing and proportioning the raw materials according to the weight parts, mixing, and uniformly stirring to form a homogeneous mixed prepolymerization liquid; wherein, the raw materials are as follows by mass: 42 parts of linear polydimethylsiloxane with molecular weight of 200000, 42 parts of polyborosiloxane, 14 parts of polymethyl vinyl siloxane with weight average molecular weight of 25000 and 2.8 parts of hydrogen-containing silicone oil.
(2) And (3) pouring the mixed prepolymer liquid obtained in the step (1) into a mold, and reacting for 12 hours at the heating temperature of 60 ℃ to obtain the high-damping silicone rubber.
Performance testing
The silicone rubbers prepared in examples 1 to 3 and comparative examples 1 to 2 were subjected to dynamic mechanical tests (tests using a An Dongpa flat rheometer) and the test results are shown in table 1.
TABLE 1 dynamic mechanical test results
From the data in Table 1, it can be seen that the high damping silicone rubbers prepared in examples 1-3 have a higher storage modulus and a higher damping coefficient over a wider frequency band and temperature range. Comparative example 1 omitted the addition of secondary bond containing polymers, the damping coefficient of the resulting silicone rubber material was small (less than 0.3) in the low frequency range; comparative example 2 omits the addition of a linear polymer fluid and the resulting silicone rubber material has a low damping coefficient (less than 0.3) in the high frequency range as well as in the low temperature range.
FIG. 1 is a plot of modulus versus angular frequency for the high damping silicone rubber prepared in example 3; fig. 2 is a loss factor-angular frequency curve of the high damping silicone rubber prepared in example 3. The results in fig. 1 to 2 show that the storage modulus and the loss modulus of the silicone rubber are both 1000Pa or more and the loss factor (damping coefficient) is maintained to be 0.3 or more over a wide frequency range of the test, indicating that the damping performance of the silicone rubber is excellent.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The high damping silicone rubber is characterized by being prepared from the following raw materials in parts by mass: 14-21 parts of silicone rubber monomer, 2-3 parts of cross-linking agent, 28-56 parts of polymer containing secondary valence bond and 28-56 parts of linear polymer fluid; the polymer containing secondary valence bonds is polyborosiloxane; the linear polymer fluid is a linear polysiloxane.
2. The high damping silicone rubber according to claim 1, wherein the weight average molecular weight of the polyborosiloxane is 500 to 6000.
3. The high damping silicone rubber according to claim 1 or 2, characterized in that the preparation method of the polyborosiloxane comprises the following steps:
boric acid, an alcohol solvent and hydroxyl-terminated polydimethylsiloxane are mixed for reaction, so that polyborosiloxane is obtained.
4. The high damping silicone rubber according to claim 1, wherein the linear polymer fluid has a weight average molecular weight of 70000 to 260000.
5. The high damping silicone rubber according to claim 1 or 4, wherein the linear polysiloxane comprises one or more of polydimethylsiloxane, polyphenylmethylsiloxane, polymethylvinylsiloxane, polymethylhydrosiloxane, and polydiethylsiloxane.
6. The high damping silicone rubber according to claim 1, wherein the cross-linking agent comprises one or more of hydrogen-containing silicone oil, ethyl orthosilicate, methyltriethoxysilane, and methyltrimethoxysilane.
7. The high damping silicone rubber according to claim 1, wherein the silicone rubber monomer is a room temperature vulcanized silicone rubber monomer or a high temperature vulcanized silicone rubber monomer.
8. The high damping silicone rubber according to claim 7, wherein the room temperature vulcanizing silicone rubber monomer comprises one or more of polymethylvinyl siloxane, vinyl siloxane, hydroxy-terminated polydimethylsiloxane, dihydroxypolydimethyldiphenyl siloxane, and polynitrile ethylmethyl siloxane.
9. The method for preparing high damping silicone rubber according to any one of claims 1 to 8, characterized by comprising the steps of:
and mixing and curing the silicone rubber monomer, the cross-linking agent, the polymer containing the secondary valence bond and the linear polymer fluid to obtain the high-damping silicone rubber.
10. The method according to claim 9, wherein the curing temperature is 60 to 100 ℃ for 6 to 12 hours.
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