Preparation and Properties of a Novel Polymeric Damping Material

摘要

Using structural materials with high damping property is known as one of the most effective method to solve vibration and noise problem at present, and polyacrylate is one of the most widely polymer damping materials. Polyacrylate was often used as a resin matrix in waterborne damping coating for its excellent weather resistance and oil resistance properties. However, conventional polyacrylate was narrow damping temperature range, which could not meet the requirements to apply practically. In the paper, Methyl methacrylate (MMA) and butyl acrylate (BA), ethyleneglycol dimethacrylate (EGDMA) and phosphate esters of peg monomethacrylate (PAM-100) were used to prepare three layers core-shell acrylate latex interpenetrating polymer networks (LIPN) via surface crosslinking emulsion polymerization. The structure and properties of the latex were characterized by DMA, DLS and AFM. Three layers core-shell acrylate LIPN with 1wt% EGDMA in both layer 1 and layer 2, 4wt% in outmost layer, could be achieved excellent damping property, which the damping peak was high up to 1.12 and the damping temperature range (tanσ>0.3) was 90°C, and had excellent adhesion to metal substrate and good film-forming property.