Introduction to Polymers

What are polymers?

• Macromolecules built from monomers

• Small molecules

• Elements in the periodic table

• None of the above

What is the primary difference between thermoplastics and thermosets?

• Thermoplastics can be reshaped by heating

• Thermosets are always flexible

• Thermoplastics are rigid

• Thermosets can be melted and reshaped

What does polymer nomenclature refer to?

• Naming of polymers

• Types of polymers

• Properties of polymers

• Applications of polymers

What is isotactic configuration in polymers?

• Side groups on the same side

• Random arrangement of side groups

• Alternating side groups

• None of the above

What are the primary types of polymer configurations?

• Isotactic, syndiotactic, atactic

• Thermoplastics, thermosets

• Elastomers, plastics

• None of the above

What is the main characteristic of elastomers?

• They can be stretched easily

• They are always rigid

• They cannot be reshaped

• They are always crystalline

What is polyethylene made from?

• Ethylene monomers

• Propylene monomers

• Butene monomers

• Isobutylene monomers

What is the chemical structure of polypropylene?

• C3H6

• C2H4

• C4H8

• C5H8

What is the primary use of polyisobutylene?

• Tire inner liners

• Plastic bags

• Automotive parts

• Rubber products

What is the main property of natural rubber?

• Elasticity

• Rigidity

• Crystallinity

• Thermal stability