This kind of polymer occurs in a long chain with only a few short branches. HDPE is an example of this kind of polymer.
What is a linear polymer?
100
Most synthetic polymers are made from
What is crude oil (petroleum)?
100
Many synthetic polymers are made into useful materials (bags, furniture, drinking bottles) that we call
What is plastic?
200
The prefix "poly" means many and "mer" means "units." Define polymer.
What is " a long chain of molecules (monomers) that repeat?
200
This kind of polymer has branches on its chains which does not allow other chains to line up close to it. LDPE is an example of this kind of polymer.
What is a branched polymer?
200
One type of synthetic polymers can be heated, melted and remolded into other objects and can be recycled. This type of polymer is called
What is thermoplatic polymers?
200
Plastics can be ____________ to hold a lot of weight, but are also ______________ so that you can put many things into it)
What is strong and flexible?
300
A long polymer could have more than _____ monmers.
What is "a million?"
300
This kind of polymer forms when heat and/or an additional substance is added to the polymer that links the chains together permanently.
What is a crosslinked polymer?
300
This type of polymer cannot be remelted or recycled. They usually are crosslinked polymers like vulcanized rubber. This type of polymer is
What is thermoset polymer?
300
Plastic coating (PVC) covers electrical wires in your home because it is a good ______________
What is insulator?
400
Some polymers occur naturally and are called biopolmyers. Give three examples of biopolymers.
What are DNA, sik, cellulose, and natural rubber?
400
This is a kind of crosslinked polymer that you created in class. After adding sodium borate to the glue polymer, you had a stronger, still flexible polymer. The polymer could stretch and then return to its original form.
What is an elastomer?
400
Linear polymers chains can line up very close to each other. When the chains become long, these polymers can be very
What is strong? Bullet -proof vests, synthetic ice rink floor are made from HDPE polymer.
500
Natural polymers are good to use because
What is "they are biodegradable and renewable."
500
Charles Goodyear crosslinked natural rubber with sulfur and created a new kind of rubber that was ___________ and more ___________ than the natural rubber. Modern tires are made from this process.
What is stronger and more flexible?
500
Branched polymers are not as strong as linear polymers, but the braching allows the polymer to be more ______
What is more flexible? (LDPE is a branched polymer)