9
Sticky — adhesive
Words to learn: adhesive • bond • surface • glue
How can one material hold two other materials together without nails, screws or stitches?
WHAT IS THE PROPERTY?
An adhesive forms a bond between surfaces. Different glues work because they interact differently with wood, paper, metal, plastic or glass.
HOW CAN WE TEST IT?
Use equal areas, equal amounts of adhesive and the same drying time, then compare how much force is needed to separate the samples.
WHY DOES IT MATTER?
Adhesives can spread forces over a surface and join materials that would be damaged or weakened by drilling holes.
WHAT YOU NEED TO KNOW
NOW LOOK AT THE TEXTBOOK
OPEN THE BOOK