4. used for: bottles, garment bags
Polyethylene
used for: bottles, garment bags

5. Polyvinyl Chloride (PVC)
used for: pipes, bottles, CD’s, computer housings

6. used for: rope, luggage, carpet, film, polar fleece
Polypropylene
used for: rope, luggage, carpet, film, polar fleece

7. used for: toys, packaging, egg cartons, flotation devices, hot cups
Polystyrene
used for: toys, packaging, egg cartons, flotation devices, hot cups

8. Straight Chained Polymer (made up of one type of monomer)

9. Straight Chained Polymer (made up of more than one type of monomer)

10. Branched Chain Polymer

11. Cross Linked Polymers

12. Vulcanizing Rubber to make it more flexible and temperature resistant involves adding Sulfur atoms to create cross-links.