Studies of Terminalia bellerica (Bahera),a natural gum,as an additive in a water-based adhesive composition

摘要

Terminalia bellerica (Bahera),a natural gum,was used as an additive in water-based natural rubber adhesive formulations.The lap shear strength of joints with wood substrates increased with the increase of natural gum concentration up to 80 phr (parts per hundred parts of rubber) loading.Similarly,the peel strength of the canvas to canvas joints increased with the incorporation of the gum.The results were explained with the help of viscoelastic properties,morphology and surface chemistry of the rubber-gum mixtures.