Design of regulable chlorobutyl rubber damping materials with high-damping value for a wide temperature range

Abstract

In this paper, a kind of specific damping material with high damping and wide effective damping temperature range (ΔT) was designed by regulating glass transition temperature (Tg). The damping material was prepared based on chlorobutyl rubber (CIIR), which exhibits high initial damping performance but also low Tg and narrow ΔT. 40 phr carbon black (CB) was added to promote the Tg of CIIR as well as acted as the reinforcing agent. Simultaneously, different dosages of terpene resin (TR) were incorporated to further control the Tg and ΔT, and improve the interfacial compatibility between CIIR with CB. Consequently, the Tg and ΔT of the composites could be regulated by changing the amount of TR under the premise of ensuring good damping and mechanical properties. Especially, when the content of TR was 30 phr, the Tg of composite was tuned from −30 °C of blank sample to 0 °C and ΔT was widen from (−60 °C, 35 °C) to (−60 °C, 60+ °C). Maximum loss factor (Tanδmax) was increased from 1.1 to 1.3 as well. In addition, this kind of damping material possessed outstanding actual shock absorption and noise reduction performances corroborated by resonance test and noise reduction test. Therefore, this damping material shows great potential in high-quality damping rubber products.