The effects of irradiation on material and cross linking process of polymers by irradiation is one of the most studied and developed industrial applications in recent years. The commercial production of cross-linked polyethylene for the isolation of cables and wires was first made in 1950's in America
Nowadays, studies carried out for the adaptation of irradiation technology to nano technology still continues.
Ionization and structure changes occur in the polymer molecules which interact with gamma rays. As a result of this interaction, the most important change observed turns out to be the strengthening of the cross linking and chain bonds.
By cross-linking, 3 basic properties of the plastic material is changed:
Mechanical Properties
Increase in rigidity
Durability to impact
Durability to corrosion and cracking
Durability to preserve its elasticity
Chemical Properties
Durability to chemical factors (grease oil, salt etc.)
Durability to hydrolisation
Thermal Properties
Durabiliy to burning
Durability to deformation caused as a result of compress pressure
Increase in dimensional stability
Increase in HDT (Heat distortion temperature) of thermal plastics.
Applications of Irradiation Processing on the Polymeric Materials
Heat Resistant Cable
Floor Heating Pipes
Gas and Water Pipes Which are With Big Diameter
Isolations of Electric Cables
Foamed Polyethylene
Heat Shrinkable Pipes and Plates
Wood Surface Coating
Papering
Covering of Ceiling
Steel Plate Covering
Plasterboard Covering
Magnetic Disc
Isolated Band
Wood and Plastic Composites (Heat and water Resistant)
