3. • Properties:
• Exposies exhibit elasticity
chemical resistance
• Phenolics fairy simple to mold
but
brittle
strong and hard
relatively easy to
cure
4. Aplications:
It can be aplied for a/an electonic chip
fibre reinforced composite
polimeric coating
spectacle lenses
dental fillings
5. Thermoplastics
• Characteristics:
• It’s a type of plastic made from polymer resins
when heated homogenized liquid becomes
when cooled hard
6. • Properties:
• Are defined as; polymers that can be melted for different
uses.
Have the simplest molecular structure with
chemical independent macromolecules
• By heating are softened
or melted shaped welded
and solidified when cooled
8. Elastomers
• Characteristics:
• They have high elongation
flexibility
breaking against
• Clasified into:
• Thermoset Elastomers- not melt when heated.
• Thermoplastic Elastomers- they melt when
heated.
9. Elastomers part 2
• Properties:
• Cannot melt, before it pass gaseous
state
• Swell in presence certain solvents
• Are generally insoluble
• Are flexible and elastic
• Lower resistance than thermoplastic
materials
10. Elastomers part 3
• Aplications:
• It can be used for -Natural rubber; used to make shoe heels
-Polybutadiene; used on the wheels
-Neoprene; used to make wetsuits
-Silicone; used to make medical prostheses, lubricants,etc