Study On Multi-Phase And Multi-Component Damping Materials Based On Polymer

Viscoelastic polymeric damping materials were firstly made in Germany in1950s, and they have attracted attention in recent years because of their versatility and wide spectrum of properties.Damping materials based on asphalt are the favorite for noise control of automobiles because of their low cost and the good damping property. In this paper, firstly, the viscoelastic damping materials based on asphalt were investigated. Using the L9(34) orthogonal table, three factors such as WD-50()(A), vermiculite(B), and SBS(C) were selected to be optimized. The results showed that the effect degree of the factors on damping property was C>B>A. And the effect of SBS and vermiculite on damping property was synthesized. The results showed that the loss factor decreased with the increase of SBS content, while it decreased firstly and then increased with the increase of vermiculite content. A quadratic was formed to optimize the orthogonal method. And the optimization scheme (5.5%WD-50,13.0%vermiculite and5.0%SBS)was obtained, its efficiency of noise control reached26.3%. Secondly, interpenetrating polymer networks (IPNs) of hydroxyl-terminated poly(butadiene/acrylonitrile)-based polyurethane/polyacrylate (PU/PA IPNs) were synthesized by a simultaneous polymerization process at room temperature. The result showed that damping property of IPNs containing butyl methacrylate showed the best, the temperature range of tan δ>0.3was126℃(-46℃-80℃) and the tan δmax reached0.85. The compatibility and morphology of PU/PA IPN with0.2036%T-12and0.2902%BPO was the best. It was also proved that the damping property of PU/PA IPN without filler was better in the low temperature and it was worse in the high temperature than the one with fillers. And the loss factor decreased with mica volume increase. Lastly, it was obtained that the damping property of PU/PA IPN was best at10Hz.