CN110655694A - Low-temperature-resistant damping composite rubber material - Google Patents
Low-temperature-resistant damping composite rubber material Download PDFInfo
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- CN110655694A CN110655694A CN201911087325.7A CN201911087325A CN110655694A CN 110655694 A CN110655694 A CN 110655694A CN 201911087325 A CN201911087325 A CN 201911087325A CN 110655694 A CN110655694 A CN 110655694A
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention provides a low-temperature-resistant damping composite rubber material, which comprises 100 parts by weight of rubber, 20-30 parts by weight of modified clay and a compounding agent; the preparation steps are as follows: adjusting the roll spacing of a double-roll open mill to 5-6mm, adding rubber, slowly adding modified clay, uniformly mixing, sequentially adding compounding agents to obtain a mixture, and vulcanizing on a flat vulcanizing machine at the vulcanizing temperature of 140 ℃ and 145 ℃ under the pressure of 8.5MPa for 20 min. The rubber roller prepared by coating the low-temperature-resistant damping composite rubber on the metal core material has good damping performance, good low-temperature resistance and mechanical property, can run at low temperature, and can obviously prolong the service life of the rubber roller.
Description
Technical Field
The invention relates to the field of high-molecular functional materials, in particular to a low-temperature-resistant damping composite rubber material.
Background
Under dynamic conditions, an object inevitably generates vibration as long as an unbalanced mass exists, and the vibration also inevitably generates noise. With the rapid development of modern industry, vibration and noise have become a serious problem in various fields: it can reduce the operation precision and affect the product quality; the service life of the product is shortened; compromising security, early destruction of the device or construct: polluting the environment and affecting the health. Therefore, it is a major subject facing the development of various industries to study and master the vibration control and noise control technology.
The rubber product used for shock absorption mainly has the function of absorbing shock energy emitted by a seismic source, and particularly prevents synchronous shock caused by resonance effect generated by shock waves. The damping effect is closely related to the damping performance of rubber, the damping of the rubber is from the internal friction of macromolecular motion, is the expression of the relaxation phenomenon of macromolecular mechanics, and is one of the main parameters of the dynamic mechanical performance of the rubber material.
The rubber roller usually generates larger friction extrusion and the like in the running process, so that not only can the product quality be influenced, but also the service life of the rubber roller can be influenced, and how to reduce the vibration becomes an important proposition. Meanwhile, some rubber rollers need to operate at low temperature, so that the rubber is required to have low temperature resistance.
Disclosure of Invention
The technical problem to be solved is as follows: in order to solve the above problems, it is important to select a suitable modifying component by modifying rubber and to blend different rubbers. The present invention has been made in view of the above circumstances, and an object thereof is to provide a low-temperature-resistant vibration damping composite rubber material.
The technical scheme is as follows:
the low temperature resistant damping composite rubber material consists of rubber in 100 weight portions and modified clay in 20-30 weight portions.
Furthermore, the coating also comprises a compounding agent.
Further, the rubber is a composition of butadiene rubber, chloroprene rubber and natural rubber.
Further, the preparation method of the modified clay comprises the following steps:
the first step is as follows: purifying the clay;
the second step is that: pulverizing by fluidized bed jet milling;
the third step: stirring and mixing the crushed clay, the organic amine modifier and the coupling agent at a high speed under the condition of temperature rise;
the fourth step: and cooling to obtain the modified clay.
Further, the particle size of the modified clay is 100-800 nm.
Further, the compounding agent comprises 2-4 parts by weight of a vulcanizing agent, 1-2 parts by weight of an accelerator, 5 parts by weight of zinc oxide, 1 part by weight of stearic acid and 0.5-1 part by weight of an anti-aging agent.
The preparation method of the low-temperature-resistant damping composite rubber material comprises the following steps:
adjusting the roll spacing of a double-roll open mill to 5-6mm, adding rubber, slowly adding modified clay, uniformly mixing, sequentially adding compounding agents to obtain a mixture, and vulcanizing on a flat vulcanizing machine at the vulcanizing temperature of 140 ℃ and 145 ℃ under the pressure of 8.5MPa for 20 min.
The low-temperature-resistant damping composite rubber is used for preparing rubber rollers, and the prepared rubber rollers have high damping performance and are suitable for low-temperature occasions.
Has the advantages that:
1. the modified clay can improve the cushioning performance after being modified, the interlayer distance of the clay is increased by the intercalation of the modifier to the clay, the intercalation of rubber to the clay is facilitated, meanwhile, one end of the modifier is combined with the surface of the clay, and the other end of the modifier interacts with the rubber to play a role of bridging, so that the clay and rubber molecules are tightly combined.
2. The damping peak value of the low-temperature-resistant damping composite rubber is more than 1, and the low-temperature-resistant damping composite rubber has a good damping effect.
3. The rubber roller prepared from the low-temperature-resistant damping composite rubber has a good damping effect when operated at a low temperature.
The attached drawings of the specification:
fig. 1 is a graph showing the variation tendency of the damping coefficient tg δ and the loss modulus of example 1.
Fig. 2 is a graph showing the variation tendency of the damping coefficient tg δ and the loss modulus of comparative example 1.
Detailed Description
Example 1
The low-temperature-resistant damping composite rubber material comprises 100 parts by weight of a composition of butadiene rubber, chloroprene rubber and natural rubber, 20 parts by weight of modified clay, 2 parts by weight of sulfur, 1 part by weight of an accelerator DM, 5 parts by weight of zinc oxide, 1 part by weight of stearic acid and 0.6 part by weight of an anti-aging agent; the ratio of the butadiene rubber, the chloroprene rubber and the natural rubber is 3:1:2, and the particle size of the modified clay is 100-800 nm.
The preparation method of the modified clay comprises the following steps:
the first step is as follows: purifying the clay;
the second step is that: pulverizing by fluidized bed jet milling;
the third step: stirring and mixing the crushed clay, the organic amine modifier and the coupling agent at a high speed under the condition of temperature rise;
the fourth step: and cooling to obtain the modified clay.
The preparation method of the low-temperature-resistant damping composite rubber material comprises the following steps:
adjusting the roll spacing of a double-roll open mill to 5-6mm, adding rubber, slowly adding modified clay, mixing uniformly, sequentially adding compounding agents to obtain a mixture, and vulcanizing on a flat vulcanizing machine at the vulcanization temperature of 145 ℃, the pressure of 8.5MPa and the time of 20 min.
Example 2
The low-temperature-resistant damping composite rubber material comprises 100 parts by weight of a composition of butadiene rubber, chloroprene rubber and natural rubber, 25 parts by weight of modified clay, 3 parts by weight of sulfur, 1.5 parts by weight of an accelerator DM, 5 parts by weight of zinc oxide, 1 part by weight of stearic acid and 0.8 part by weight of an anti-aging agent; the ratio of the butadiene rubber, the chloroprene rubber and the natural rubber is 4:1:1, and the particle size of the modified clay is 100-800 nm.
The preparation method of the modified clay comprises the following steps:
the first step is as follows: purifying the clay;
the second step is that: pulverizing by fluidized bed jet milling;
the third step: stirring and mixing the crushed clay, the organic amine modifier and the coupling agent at a high speed under the condition of temperature rise;
the fourth step: and cooling to obtain the modified clay.
The preparation method of the low-temperature-resistant damping composite rubber material comprises the following steps:
adjusting the roll spacing of a double-roll open mill to 5-6mm, adding rubber, slowly adding modified clay, mixing uniformly, sequentially adding compounding agents to obtain a mixture, and vulcanizing on a flat vulcanizing machine at the vulcanization temperature of 140 ℃, the pressure of 8.5MPa and the time of 20 min.
Example 3
The low-temperature-resistant damping composite rubber material comprises 100 parts by weight of a composition of butadiene rubber, chloroprene rubber and natural rubber, 25 parts by weight of modified clay, 3 parts by weight of sulfur, 1.5 parts by weight of an accelerator CZ, 5 parts by weight of zinc oxide, 1 part by weight of stearic acid and 0.8 part by weight of an anti-aging agent; the ratio of the butadiene rubber, the chloroprene rubber and the natural rubber is 4:1:2, and the particle size of the modified clay is 100-800 nm.
The preparation method of the modified clay comprises the following steps:
the first step is as follows: purifying the clay;
the second step is that: pulverizing by fluidized bed jet milling;
the third step: stirring and mixing the crushed clay, the organic amine modifier and the coupling agent at a high speed under the condition of temperature rise;
the fourth step: and cooling to obtain the modified clay.
The preparation method of the low-temperature-resistant damping composite rubber material comprises the following steps:
adjusting the roll spacing of a double-roll open mill to 5-6mm, adding rubber, slowly adding modified clay, mixing uniformly, sequentially adding compounding agents to obtain a mixture, and vulcanizing on a flat vulcanizing machine at the vulcanization temperature of 145 ℃, the pressure of 8.5MPa and the time of 20 min.
Example 4
The low-temperature-resistant damping composite rubber material comprises 100 parts by weight of a composition of butadiene rubber, chloroprene rubber and natural rubber, 30 parts by weight of modified clay, 4 parts by weight of sulfur, 2 parts by weight of an accelerator CZ, 5 parts by weight of zinc oxide, 1 part by weight of stearic acid and 1 part by weight of an anti-aging agent; the ratio of the butadiene rubber, the chloroprene rubber and the natural rubber is 5:1:2, and the particle size of the modified clay is 100-800 nm.
The preparation method of the modified clay comprises the following steps:
the first step is as follows: purifying the clay;
the second step is that: pulverizing by fluidized bed jet milling;
the third step: stirring and mixing the crushed clay, the organic amine modifier and the coupling agent at a high speed under the condition of temperature rise;
the fourth step: and cooling to obtain the modified clay.
The preparation method of the low-temperature-resistant damping composite rubber material comprises the following steps:
adjusting the roll spacing of a double-roll open mill to 5-6mm, adding rubber, slowly adding modified clay, mixing uniformly, sequentially adding compounding agents to obtain a mixture, and vulcanizing on a flat vulcanizing machine at the vulcanization temperature of 145 ℃, the pressure of 8.5MPa and the time of 20 min.
Comparative example 1
This example differs from example 1 in that unmodified clay is used. Specifically, the method comprises the following steps:
the low-temperature-resistant damping composite rubber material comprises 100 parts by weight of a composition of butadiene rubber, chloroprene rubber and natural rubber, 20 parts by weight of clay, 2 parts by weight of sulfur, 1 part by weight of accelerator, 5 parts by weight of zinc oxide, 1 part by weight of stearic acid and 0.6 part by weight of antioxidant; the ratio of the butadiene rubber, the chloroprene rubber and the natural rubber is 3:1:2, and the particle size of the clay is 350-900 mu m.
The preparation method of the low-temperature-resistant damping composite rubber material comprises the following steps:
adjusting the roll spacing of a double-roll open mill to 5-6mm, adding rubber, slowly adding modified clay, mixing uniformly, sequentially adding compounding agents to obtain a mixture, and vulcanizing on a flat vulcanizing machine at the vulcanization temperature of 145 ℃, the pressure of 8.5MPa and the time of 20 min.
All physical and mechanical properties are tested according to the corresponding national standard.
Dynamic mechanical properties were tested using example 1 and comparative example 1.
TABLE 1 mechanical Properties of Low temperature resistant damping composite rubber Material
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | |
| Tensile Strength (MPa) | 20.2 | 20.8 | 21.2 | 21.8 | 19.6 |
| Elongation at Break (%) | 477 | 483 | 470 | 474 | 470 |
Example 1 performance is shown in fig. 1, where the solid line shows the variation law of the damping coefficient tg δ and the dotted line shows the variation trend of the loss modulus. As can be seen from the figure, the trend of the change of the damping coefficient of the low-temperature-resistant damping composite rubber along with the temperature is firstly increased and then reduced, the material is in a glass state before the temperature is about minus 38.8 ℃, and the deformation is mainly generated by the bending of chemical bond angles in a polymer chain because the motion of a macromolecular chain segment is frozen, so the elastic modulus of the material is very high, and the damping coefficient is very small; with the rise of temperature, the freely movable chain segment starts to move, the redundant energy is lost to heat, the transition reaches the maximum within a certain temperature range, the damping coefficient and the loss modulus are peak-shaped, the elastic modulus rapidly decreases, the damping coefficient reaches the maximum of 1.117 at the temperature of 27.9 ℃ below zero, then the damping coefficient gradually decreases, the damping coefficient is 0.154 at the temperature of 20 ℃, and the change amplitude is reduced. From the whole curve, the tg delta peak is wider, the damping coefficient is larger and reaches up to 1.117, and the damping coefficient is about 0.15 at normal temperature, so that the low-temperature-resistant damping composite rubber has an ideal damping effect. Comparative example 1 performance as shown in fig. 2, we can see that the damping performance is significantly inferior to that of example 1.
Claims (7)
1. The low-temperature-resistant damping composite rubber material is characterized in that: the rubber-modified clay rubber comprises 100 parts by weight of rubber and 20-30 parts by weight of modified clay.
2. The low temperature resistant damping composite rubber material according to claim 1, wherein: also comprises a compounding agent.
3. The low temperature resistant damping composite rubber material according to claim 1, wherein: the rubber is a composition of butadiene rubber, chloroprene rubber and natural rubber.
4. The low temperature resistant damping composite rubber material according to claim 1, wherein: the preparation method of the modified clay comprises the following steps:
the first step is as follows: purifying the clay;
the second step is that: pulverizing by fluidized bed jet milling;
the third step: stirring and mixing the crushed clay, the organic amine modifier and the coupling agent at a high speed under the condition of temperature rise;
the fourth step: and cooling to obtain the modified clay.
5. The low temperature resistant damping composite rubber material according to claim 4, wherein: the particle size of the modified clay is 100-800 nm.
6. The low temperature resistant damping composite rubber material according to claim 2, wherein: the compounding agent comprises 2-4 parts by weight of vulcanizing agent, 1-2 parts by weight of accelerator, 5 parts by weight of zinc oxide, 1 part by weight of stearic acid and 0.5-1 part by weight of anti-aging agent.
7. The preparation method of the low-temperature-resistant damping composite rubber material according to claim 1, characterized by comprising the following steps: the method comprises the following steps:
adjusting the roll spacing of a double-roll open mill to 5-6mm, adding rubber, slowly adding modified clay, uniformly mixing, sequentially adding compounding agents to obtain a mixture, and vulcanizing on a flat vulcanizing machine at the vulcanizing temperature of 140 ℃ and 145 ℃ under the pressure of 8.5MPa for 20 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911087325.7A CN110655694A (en) | 2019-11-08 | 2019-11-08 | Low-temperature-resistant damping composite rubber material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911087325.7A CN110655694A (en) | 2019-11-08 | 2019-11-08 | Low-temperature-resistant damping composite rubber material |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120277361A1 (en) * | 2011-04-29 | 2012-11-01 | Korea Institute Of Science And Technology | Functional reinforcing fillers modified with alkenylalkoxysilane and preparing method of the same |
| CN103205028A (en) * | 2013-04-24 | 2013-07-17 | 衡水中铁建工程橡胶有限责任公司 | Organic clay rubber composite material for laminated rubber supporting seat and preparation process thereof |
| CN105111521A (en) * | 2015-09-02 | 2015-12-02 | 徐州工业职业技术学院 | Colored hand cart tire rubber material filled with semi-wet modified attapulgite and preparation method of colored hand cart tire rubber material |
| CN105524297A (en) * | 2014-09-28 | 2016-04-27 | 兰州大学 | Preparation method of attapulgite/hydrotalcite composite filler used in rubber reinforcement |
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2019
- 2019-11-08 CN CN201911087325.7A patent/CN110655694A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120277361A1 (en) * | 2011-04-29 | 2012-11-01 | Korea Institute Of Science And Technology | Functional reinforcing fillers modified with alkenylalkoxysilane and preparing method of the same |
| CN103205028A (en) * | 2013-04-24 | 2013-07-17 | 衡水中铁建工程橡胶有限责任公司 | Organic clay rubber composite material for laminated rubber supporting seat and preparation process thereof |
| CN105524297A (en) * | 2014-09-28 | 2016-04-27 | 兰州大学 | Preparation method of attapulgite/hydrotalcite composite filler used in rubber reinforcement |
| CN105111521A (en) * | 2015-09-02 | 2015-12-02 | 徐州工业职业技术学院 | Colored hand cart tire rubber material filled with semi-wet modified attapulgite and preparation method of colored hand cart tire rubber material |
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