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A kind of rubber base damping material and preparation method thereof
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A damping material, rubber-based technology, applied in the field of rubber-based damping materials and its preparation, can solve the problem of low mechanical properties
Active Publication Date: 2020-08-14
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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Problems solved by technology
For example, in Chinese patent 201310111532.8, a damping material is prepared by blending butyl rubber and natural rubber, which broadens the effective damping range of the composite material, but the mechanical properties are low
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preparation example Construction
[0048] The present invention also provides a preparation method of the rubber-based damping material, comprising the following steps:
[0049] Carrying out the first mixing of natural rubber and epoxidized natural rubber to obtain a rubber composition;
[0050] performing a second mixing of the rubber composition with fillers, softeners, vulcanization accelerators and vulcanizing agents to obtain a rubber compound;
[0051] The mixed rubber is vulcanized to obtain a rubber-based damping material.
[0052] In the present invention, the natural rubber and the epoxidized natural rubber are first mixed to obtain a rubber composition. In the present invention, the first kneading temperature is preferably 40-70°C, more preferably 45-65°C, most preferably 50-60°C; the first kneading time is preferably 2-8min, More preferably 3 to 7 minutes, most preferably 4 to 6 minutes.
[0053] After the rubber composition is obtained, the present invention performs second mixing on the rubber ...
Embodiment 1
[0058] At a temperature of 50°C, 60g natural rubber, 20g ENR-25 type epoxidized natural rubber and 20g ENR-40 type epoxidized natural rubber were mixed on an open mill for 4 minutes to obtain a rubber composition;
[0060] The mixed rubber was left to stand for 12 hours, and vulcanized on a flat vulcanizer for 20 minutes at 150°C and 15MPa to obtain a rubber-based damping material.
Embodiment 2
[0062] At a temperature of 50°C, 60g natural rubber, 20g ENR-20 type epoxidized natural rubber and 20g ENR-50 type epoxidized natural rubber were mixed on an open mill for 4 minutes to obtain a rubber composition;
[0064] The mixed rubber was left to stand for 12 hours, and vulcanized on a flat vulcanizing machine for 20 minutes at 150° C. and 15 MPa to obtain a rubber-based damping material.
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Abstract
The invention provides a rubber-based damping material which is prepared from the following raw materials in parts by weight: 100 parts of rubber, 20-60 parts of fillers, 0-10 parts of a softener, 6-15 parts of a vulcanization accelerator and 1-15 parts of a vulcanizer, wherein the rubber comprises natural rubber and epoxidized natural rubber; the epoxidized natural rubber comprises epoxidized natural rubber having an epoxy content of less than or equal to 25% and epoxidized natural rubber having an epoxy content of greater than or equal to 30%. According to descriptions of embodiments, the rubber-based damping material has an effective damping temperature range of up to 85 DEG C, a tensile strength of up to 22.7 MPa and an elongation at break of up to 785%, so that the tensile strength of18.7 MPa and the elongation at break of 617% in the prior art are both improved significantly. The invention also provides a preparation method of the rubber-based damping material, wherein the preparation method is readily available in raw material and simple in processing process.
Description
technical field [0001] The invention relates to the technical field of rubber materials, in particular to a rubber-based damping material and a preparation method thereof. Background technique [0002] The vibration generated by mechanical movement can cause damage to machinery, shorten its service life, and pollute the environment with noise. Due to the frequent occurrence of earthquakes in recent years, especially as people's requirements for quality of life increase, shock-absorbing materials have become a hot research topic at home and abroad. In recent years, high shock-absorbing materials have been widely used in industries such as aerospace, automobiles, skyscrapers and household appliances. Natural rubber is widely used in shock-absorbing and damping fields such as buildings, bridges, rail transit, and aerospace because of its excellent comprehensive mechanical properties. The design principles for applying rubber damping materials are: the loss modulus is as high a...
Claims
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Application Information
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