Characterization of PMMA Composite Dispersed Aluminum Powder Prepared by Solution-Casting to Utilize for Automobile Body Applications

In order to utilize for automobile body applications, poly-methyl methacrylic acid (acrylic resin, PMMA) composites dispersed by Al-powders was prepared by solution-casting, which could easily control the dispersion ratio. Although the Al addition gradually decreased the impact value, it radically enhanced the electrical conductivity at the critical volume fraction in polymer. The jump of electrical conductivity was observed at the critical volume fraction of the Al addition. Based on the percolation theory, the result was explained.