Rubber uses
Car tyres, rubber gloves, bouncy balls and wet suits.
Rubber properties
Good elasticity, abrasion, water and chemically resistant, contracts when heated instead of expanding.
How can rubber be made stronger?
Through a process called vulcanising which adds additional cross links and produces the type of black rubber used for car tyres.
Where can rubber come from?
Natural sources- natural rubber
Synthetic sources- polyvinyl acetate (PVA), neoprene and polyacrylics.
Polyvinyl acetate (PVA) properties, disadvantages and uses.
Non toxic, dries clear, good initial grip
Susceptible to fungal attack, slow drying time as it is an adhesive
Wood adhesive, book binder and primer.
Neoprene properties, disadvantages and uses.
Resistant to cracking, impact resistant and flexible
Relatively expensive, lacks resistance to chemicals
Seals, protective cases, gaskets (mechanical seal to prevent leaks).
Polyacrylic properties, disadvantages and uses.
Transparent, shatter resistant and lightweight
Poor chemical resistance, brittle
Car light lenses, windows and display units.
