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Regulation of the damping properties of rubber to make progress Recently, the Chinese Academy of Sciences, Hefei Institutes of Physical Science, Institute of Solid State Physics, nano-materials and application development center Tian Xingyou research team led by researchers made new progress in damping performance control and relaxation Behavioral segments aspects rubber.
EPDM rubber (EPDM), as an important class of damping material, widely used in automobile manufacturing, aerospace and high-speed rail and other fields. Now, with the use of environmental modification, while in some special occasions, how to further broaden the material damping temperature range is the main problem currently facing the damping rubber.
Vulcanized rubber crosslinked network is a key factor in damping performance of R & D personnel to introduce inorganic silica particles to EPDM rubber matrix, through the evolution of regulatory networks controlling vulcanized rubber segment EPDM relaxation behavior at different temperatures, and ultimately, A damping and mechanical properties of the rubber composite sync improvements, especially in the high temperature zone has a good damping properties, which greatly expanded the damping temperature range.
This is mainly due to the inorganic particles by suppressing the vulcanization network decreased crosslink density, increasing the number of non-elastic segments of the network, to improve the segmental mobility, and with increasing the number of copies of the filling exhibit different relaxation behavior of the segments, thereby improving the damping properties and use temperature range; while inorganic particles also play a mechanical effect enhanced mechanical properties such as tensile strength also improved significantly, and therefore the material is excellent overall performance.
These results contribute to better understanding of polymer composites segment relaxation behavior of understanding, for high performance damping rubber provides a new idea. This work was funded by the National Natural Science Foundation project.