Outcome 2- Polymers Flashcards Preview

Unit 1 Chem > Outcome 2- Polymers > Flashcards

Flashcards in Outcome 2- Polymers Deck (10):
1

LDPE

Low density Polymer- High number of side branches. makes them soft

2

HDPE

High density Polyer- Low number of side branches. makes them hard and rigid

3

Thermosetting polymer

When there are a lot of Cross links. making it hard and impossible to mould back. chars when heated

4

Thermoplastic Polymer

Low amount of Cross links. which makes them soft and able to be remoulded when heated.

5

Isotatic

When side branches are arranged on the same side of a linear polymer making them rigid and tough

6

Atoctic

Side branches occur at irregular points on both side of the chain of linear polymers. makes them soft and waxy with little potential of use.

7

Writting an addition polymer Etc Butene
C-C=C-C

Propane intervals

c-c-c | c-c-c | c-c-c

8

General structural model for polymer materials and the forces existing between chains

Dispersion forces

9

What is a plasticiser?

Plasticsers go in-between carbon chains and pull them apart from each other making the polymer more flexible.

10

Advantages and disadvantages of the use of polymers

Advantages
-Can be modelled into any shape
- Dont corrode
-Are good insulators of electricity

Disadvantages
-Takes up a long time to decompose
- Takes up space in landfill
- Cause pollutions