Abstract: Liquid silicon rubber acetate (LSR) filled with hollow glass beads was studied as a heat-insulation composite. The effect of hollow glass beads on the thermal conductivity and tensile strength was investigated. It indicated that as the content of hollow glass beads increased, the thermal conductivity of the composites first increased then declined. At the same loading of hollow glass beads, the thermal conductivity decreased with decreasing particle size. The composite filled with 15 phr of hollow glass beads (diameter of 40μm) gave rise to the minimum thermal conductivity of 0.0135 W/m·K. The tensile strength and elongation at break decreased with increasing loading of hollow glass beads and decreasing particle size of the hollow glass beads.

Key words: heat-insulation materials, liquid silicon rubber acetate, hollow glass beads, thermal conductivity