Physical Properties of Materials

Resistance to Moisture

Resistance to Moisture

A material’s ability to prevent liquid and moisture permeating its surface

Example of Moisture Resistant Materials

PVC - excellent moisture-resistant properties, can be added as a coating to fabrics that can then be used to produce waterproof clothing

Absorbency

A material’s ability to soak

Example of Absorbent Materials

Natural Fibres - cotton and wool have high absorbency, making them comfortable to wear if they absorb perspiration
Synthetic fibres - polyester and nylon are virtually non-absorbent so can be uncomfortable to wear, like wearing a plastic bag

Fusiblity

A material’s ability to be heated and joined to another material when cooled

Example of a Fusible Material

Solder - very important property of solder where its low melting point allows it to melt with the heat of the soldering iron and join to another metal when it cools

Electrical Conductivity

A material’s ability to conduct electricity

Example of a matrial with good Electrical Conductivity

Copper - copper is a good conductor of electricity and is therefore used in wiring

Thermal Conductivity

A material’s ability to conduct heat and thermal energy

Example of a material with good Thermal Conductivity

Steel - Steel is an alloy of mainly iron and carbon, this makes it a very good thermal conductor

Pine is an example of a thermal insulator - it does not conduct heat very well

Density

A material’s solidity

mass (grams) / volume (cm³)

An example of a Dense Material

Tungsten - tungsten is a very dense metal with a density of around 19.3gdm^-3