The thermal vacuum of space condition is an important factor to cause properties degradation and outgassing
contamination of adhesive bonding materials used in optic-electrical components. The thermal vacuum aging
and volatile characteristic of several typical adhesive bonding materials were investigated. The change of mechanical
properties and the source of volatile after thermal vacuum test were analyzed and discussed, and the pretreatment
method under thermal vacuum condition were validated and analyzed. The results indicate that the soft silicone rubber
adhesive display greater mass loss than that of harder epoxy resin and acrylic resin adhesives, and the condensation
type silicone rubber and epoxy resin adhesives appear greater changes of modulus because of end hydroxyl group exist
in their molecular structures. The pretreatment method under thermal vacuum condition could be used as an effective
measure to reduce the outgassing contamination of adhesive bonding materials. The results are important for the design
and screening of nonmetallic materials used in optic-electrical components.