PLASTICS

HELENA’S PART

Physical Properties:o Electrical Conductivity: It is the capacity of a material to transport the electric circuit.- Lowo Thermal Conductivity:It is the capacity of a material to transport heat- o Density:The density of any material is mass divided into volume-Light

o Expansion: It is when an object increase Depending on the temperature-higho Melting point: Is the point in which one object Melts,and depending on each, the object melts at different temperaturesPlastics:200ºCo Fusibility:Is the ease in which a material will melt

• Mechanical Propertieso Types of stress

-Traction: When two opposite objects collapse.-No traction

-Compression: When one object contract it self-low

-bending:When one object folds-low

-shearing:It is when the force is ma- de in two different direction in

an object-low -Torsion: Is the force that a

human makes for twisting an object-low

Shearing

torsion

Bending

compression

traction

o Elasticity: It is when an object can change the shape and then turn into the original form-lowo Plasticity:Is the property which can change the Form and does not move.-low

Ductility:This is a material’s capacity to deform permanently under the force of tractionMalleability:Produces slaps and sheetesResistance:Can undergo forces with out breakingHardness: resistance

dented scratched

Weldability:Two Materials Join together because of

heat

Permeability:ability for water to pass Through-they are impermeableSolubility:Materials can mix with substances- normally they can’tCombustibilityMaterials can burn with outThermal energy

• Quemical properties:

Recyclability:Transform old material Into a new one-YesToxicity:It cause negative effects-YesBiodegradability:Capacity of a material to Deteriorate- takes long

•Biological properties