Abstract: The acrylate copolymer latexes containing different contents of organosilicon were synthesized by emulsion polymerization and then characterized by Fouriertransform infrared spectroscopy. Their morphologies and dynamic mechanical properties were investigated by scanning electron microscopy (SEM) and dynamic mechanical analysis (DMA), respectively. A series of waterborne damping materials for vehicles were prepared by compounding the resulting copolymer latexes with inorganic fillers. SEM observation demonstrated that the incorporation of organosilicon could improve the compatibility between the copolymer latexes and inorganic fillers and thus resulted in a better interfacial combination between them. DMA investigation showed that the damping properties of the damping materials were enhanced significantly. Moreover, the mechanical properties of the damping materials also presented a remarkable improvement due to the addition of organosilicon.

Key words: organosilicon, damping material, acrylate copolymer latexes, compatibility, mechanical property