Abstract
In this work, a novel type of diatomite was prepared with a limited content of hindered phenol groups grafted on its hydrophobic surface. The obtained samples were characterized for their surface groups, particle morphology, pore structure, and thermal behaviors. Then, modified diatomite (MDT) was used in preparation of reinforced chlorinated butyl rubber (CIIR) composites by mechanical blending method. The powder of MDT can be uniformly dispersed in CIIR matrices and the compatibility was good. In addition, the MDT showed a positive effect on damping performance of CIIR composites. A blending ratio of CIIR/MDT = 100/10 presented the best damping performance and the damping temperature range (tan δ > 0.7) was extended from 60 to 70 °C. The variable temperature FTIR spectra showed the presence of hydrogen bonds between the hydroxyl groups and chloride atoms in the CIIR matrices, and a blue shift exhibited when these hydrogen bonds were dissociated. Hence, these CIIR composites provided good damping behaviors and supplied a novel and promising way for preparation of high damping rubber composites with broad temperature ranges.
Highlights
With development of science and technology, various large machines have been produced.noise and friction are generated with operation of large machines
CIIR refers to pure CIIR, CIIR/modified diatomite (MDT)-5 refers to the CIIR added with 5 phr of MDT, and the other samples were named
This work successfully prepared a novel type of MDT which was an effective additive for
Summary
With development of science and technology, various large machines have been produced. Damping materials arose, which can absorb vibrations and turn the mechanical energy into heat. They can be used to reduce the resonance amplitude and extend the fatigue life of machines [1,2]. As an important type of damping material, has a viscoelastic structure to absorb vibration energy and convert it into heat [3,4]. Chlorinated butyl rubber (CIIR) has better energy absorptivity and worse molecular mobility compared with any other polymeric composites [5]. It contains active chlorine and consists of isobutylene isoprene copolymer. The properties of modified CIIR such as cure characteristics, tensile properties, and dynamic mechanical performance were investigated in detail
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