Chapter 29 - Polymerisation Flashcards
1
Q
Define addition polymer
A
Long chain molecules formed from lots of small molecules (monomers) join together to form a polymer, with nothing else formed
2
Q
Define condensation polymers
A
Long chain molecules formed from lots of small molecules (monomers) joined together to form a polymer with another small molecule formed as well
3
Q
Describe how polyesters are formed
A
- Dicarboxylic acids + diols
- In the presence of a strong acid or specific enzyme
4
Q
Describe how polyamides are formed
A
- Dicarboxylic acids + diamines
- In the presence of a strong acid or specific enzyme
5
Q
What is the main problem with addition polymers?
A
- Generally unreactive and chemically inert
- So do not biodegrade
6
Q
List the 3 methods of non-biodegradable polymer disposal and their problems
A
- Landfill - Land is limited
- Incineration - Greenhouse gases such as CO2 and toxic gases are produced
- Recycling - Seperation of pure polymers can be expensive and difficult
7
Q
Why are condensation polymers better for the environment?
A
Biodegradable
* Amide or ester linkages can be reacted with acids or bases in hydrolysis
8
Q
Name 3 reactants that will break down condensation polymers but not addition polymers
A
- NaOH
- HCl
- Na2CO3
