Is a strong adhesive, particularly in relation to non-porous materials used or when very small traces of water remains on the surface. It is also very good for bonding the body tissues, and although this can be annoying (even dangerous) side effects in everyday use, it is used for the advantage of the stitch-less surgery.
Cyanoacrylate glue has a low shearing strength, which has also led to its use as a temporary adhesive in cases where the piece can easily be sheared off at a later time. Common examples include mounting a workpiece to a sacrificial glue block on a lathe and also tightening pins and bolts.
Another important trait is that cyanoacrylate sets quickly, often in less than a minute. A normal bond reaches full strength in two hours and is waterproof. Accelerators such as toluidine trigger setting in two or three seconds, with some loss of strength.
Acetone, which is commonly found in nail polish remover, is a widely available solvent capable of softening cured cyanoacrylate. Nitromethaneis also an excellent solvent. Dimethyl sulfoxide can be used as solvent too. Methylene chloride is the most effective solvent, but is toxic.Gamma-butyrolactone is also effective at removing cured cyanoacrylate, and has low toxicity.
Low temperatures cause cured cyanoacrylate to become brittle. Cyanoacrylate's bonds can be weakened (allowing disassembly) by placing a glued object in a household freezer for several hours. Opened containers of cyanoacrylate glue can also be delayed from prematurely setting by storing the containers in the household refrigerator.
Generally, cyanoacrylate is an acrylic resin which rapidly polymerises in the presence of water (specifically hydroxide ions), forming long, strong chains, joining the bonded surfaces together. Because the presence of moisture causes the glue to set, exposure to moisture in the air can cause a tube or bottle of glue to become unusable over time. To prevent an opened container of glue from setting before use, it must be stored in an airtight jar or bottle with a package of silica gel.
This article is based on an article from Wikipedia.
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