PARALOID B-72 AS A STRUCTURAL ADHESIVE AND AS A BARRIER WITHIN STRUCTURAL ADHESIVE BONDS: EVALUATIONS OF STRENGTH AND REVERSIBILITY
JERRY PODANY, KATHLEEN M. GARLAND, WILLIAM R. FREEMAN, & JOE ROGERS
5 REVERSIBILITY EVALUATIONS
Since an assumed major benefit of the B-72 barrier coating as part of the structural joint was that it would lend greater reversibility to the joint, it was essential to evaluate this assumption. Nine test coupons consisting of two cores each adhered with the same adhesive and prepared in the same manner as described for the tensile test (not including the aluminum carrier) were prepared and dried or cured for the same period of time under the same conditions. These samples were then suspended in a closed vessel containing a saturated acetone vapor environment. The joint was considered “reversed” or failed when the bottom core of the bonded pair dropped away.