Polymers Flashcards
What are polymers?
Polymers are long chain molecules made of repeating units.
What are monomers?
The repeated units themselves
What happens to the double covalent bond when many monomers make a polymer?
It breaks and forms 2 half bonds at either end.
What are the essential rules when drawing polymers?
Brackets ‘n bonds.
- Half bonds need to go out of brackets
- n represents the big number of monomers
What type of bond links monomers to form polymers?
Covalent bonds
Why is a polymer’s property different from the monomer it is made up from?
- There are lots of intermolecular forces as the polymer’s chains overlap.
What are intermolecular forces?
Intermolecular forces are weak forces of attraction between molecules.
What is the issue with burning polymers when they have been used?
- It releases carbon dioxide, contributing to greenhouse effect.
- Releases poisonous gases
What is the issue with polymers being recycled?
- Best option
- Difficult as there are many different plastics.
Why do polymers have LOTS of intermolecular forces?
- Because they overlap with many other molecules
TRUE OR FALSE
Ethene has same properties as polyethene.
- False.
- Polyethene has different properties because of intermolecular forces.
Why are polymers solid at room temperature?
- Many intermolecular forces because layers overlap.
- Require a lot of energy to break.
Q.)
Describe structure and bonding in thermosoftening polymer and explain why they melt when heated.
- Large chain molecules
- With weak intermolecular forces between chains.
- Require little energy to break
