文章摘要
Effect of Particle Sizes of Mica Powder on Properties of Damping IIR Compounds with Wide Temperature Ranges
Received:November 30, 2023  Revised:November 30, 2023
DOI：10.12136/j.issn.1000-890X.2025.09.0673
Key Words: mica powder；particle size；IIR；damping performance；physical property
Author NameAffiliationE-mail
LIU Chao* China Petrochemical Corporation,Yanshan Branch of Beijing Research Institute of Chemical Industry/National Engineering Research Center for Rubber and Plastic New Material Synthesis liuch.bjhy@sinopec.com 
ZHENGFangyuan China Petrochemical Corporation,Yanshan Branch of Beijing Research Institute of Chemical Industry/National Engineering Research Center for Rubber and Plastic New Material Synthesis  
HE Huan China Petrochemical Corporation,Yanshan Branch of Beijing Research Institute of Chemical Industry/National Engineering Research Center for Rubber and Plastic New Material Synthesis  
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Abstract:
      Effect of the particle sizes of mica powder on the properties of damping butyl rubber（IIR）compounds with wide temperature ranges was investigated. The results showed that，mica powder could adsorb sulfur and accelerators，causing a delayed effect on the vulcanization of IIR compound and reducing the vulcanization rate，but effectively preventing the scorching.The physical properties of IIR vulcanizates reinforced with mica powder with particle size of 10～60 μm were better than those of IIR vulcanizate reinforced with carbon black N330.Compared with IIR vulcanizate reinforced with carbon black N330，the maximum loss factor（tanδmax）of IIR vulcanizate reinforced with mica powder was significantly improved.The damping temperature range of loss factor≥0.3 of IIR vulcanizate reinforced with mica powder of 60 μm was equivalent to that of IIR vulcanizate reinforced with carbon black N330，and both were wider than the damping temperature ranges of IIR vulcanizate reinforced with mica powder with other particle sizes.Moreover，the tanδmax of IIR vulcanizate reinforced with mica powder with particle size of 60 μm was the largest，the damping performance was the best.Both too large or too small particle sizes of mica powder were detrimental to the damping performance of IIR vulcanizate.
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