3.3.12.1 Addition Polymers

• The mechanism of addition polymerization includes initiation, propagation, and termination.

  True
• Steps in the mechanism of addition polymerization:

  1️⃣ Initiation

  2️⃣ Propagation

  3️⃣ Termination
• Ethene monomers undergo addition polymerization to form the polymer polyethene
• Match the addition polymer with its use:

  Polyethene ↔️ Packaging

  Polyvinyl chloride ↔️ Construction
• Addition polymers form when monomers link via breaking a carbon-carbon double bond.
• What type of bond must monomers have to form addition polymers?

  Carbon-carbon double bond
• Addition polymerization involves the loss of atoms during the process.

  False
• Polyethene's flexibility is influenced by its simple structure and weak intermolecular forces.
• What property makes polyethene suitable for packaging?

  Flexibility
• Addition polymers are formed when small molecules called monomers join together without the loss of any atoms
• Match the monomer with its corresponding addition polymer:

  Ethene ↔️ Polyethene

  Propene ↔️ Polypropene

  Vinyl chloride ↔️ Polyvinyl chloride
• Addition polymerization involves the loss of atoms during the reaction.

  False
• Monomers with a carbon-carbon double bond are required for addition polymerization.

  True
• What property makes polyvinyl chloride suitable for construction?

  Rigid and weather-resistant
• Polyvinyl chloride (PVC) is rigid and weather-resistant, making it suitable for construction.


  True
• Ethene monomers undergo addition polymerization to form polyethene.
• Match the addition polymer with its monomer:

  Polyethene ↔️ Ethene

  Polypropene ↔️ Propene

  Polyvinyl chloride ↔️ Vinyl chloride
• Polyvinyl chloride is more rigid than polyethene due to stronger dipole-dipole interactions.


  True
• Polypropene fibers are used in textiles due to their strength, light weight, and chemical resistance.
• In the initiation step of addition polymerization, a free radical attacks a monomer's double bond
• What type of bond must monomers have to undergo addition polymerization?

  Carbon-carbon double bond
• The monomer of polypropene is propene
• What is the monomer for polypropene (PP)?

  Propene
• Match the addition polymer with its property:

  Polyethene ↔️ Flexible, durable

  Polyvinyl chloride ↔️ Rigid, weather-resistant
• Describe the steps of addition polymerization

  1️⃣ Initiation: A free radical attacks a monomer's double bond

  2️⃣ Propagation: The radical-monomer reacts with another monomer

  3️⃣ Termination: Two free radicals combine, stabilizing the polymer
• What two factors influence the properties of addition polymers?

  Monomer structure, polymerization conditions
• Match the addition polymer property with its example:

  Flexibility ↔️ Polyethene

  Rigidity ↔️ Polyvinyl chloride

  Heat resistance ↔️ Polytetrafluoroethene