Design of regulable chlorobutyl rubber damping materials with high-damping value for a wide temperature range. (October 2019) - Liu, Cong
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 ( T g ). The damping material was prepared based on chlorobutyl rubber (CIIR), which exhibits high initial damping performance but also low T g and narrow ΔT . 40 phr carbon black (CB) was added to promote the T g of CIIR as well as acted as the reinforcing agent. Simultaneously, different dosages of terpene resin (TR) were incorporated to further control the T g and ΔT, and improve the interfacial compatibility between CIIR with CB. Consequently, the T g 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 T g 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. Graphical abstract: Image 1 Highlights: Specific damping rubber with high damping and wide effective damping temperature range ( ΔT ) was designed. The T g and ΔT of the materials can be adjusted by changing the amount of terpene resin (TR) under the premise of ensuring good damping and mechanical properties. The incorporation of TR can improve the compatibility between rubber matrix and nanofiller. The excellent actual shock absorption and noise reduction effect of the composites were analyzed by resonance tests and noise reduction tests. This work provides a reference for the popularization of high-quality damping rubber products.