Polymerisation Reactions Flashcards Preview

Chemistry 6 - Organic Chemistry > Polymerisation Reactions > Flashcards

Flashcards in Polymerisation Reactions Deck (16)
1

what kind of compounds can be polymerised

compounds with a C=C bond

2

what are polymerisation reactions essentially and why

- addition reactions
- because the alkene molecules add together in vast numbers to form the polymer

3

what general conditions do polymerisation reactions occur in

conditions of high temperature and pressure

4

what would you technically call an alkene molecule if it were to be used in a polymerisation reaction

a monomer

5

what is the standard way to write the name of a polymer

- to write poly at the beginning
- followed by the name of the monomer in brackets

6

what are the polymer names of ethene, propene, chloroethene, tetraflouroethene and phenylethene

- poly(ethene)
- poly(propene)
- poly(chloroethene)
- poly(tetraflouroethene)
- poly(phenylethene)

7

what are common names of the polymers of ethene, propene, chloroethene, tetraflouroethene and phenylethene

- polythene
- polypropene or polypropylene
- polyvinyl chloride or PVC
- PTFE or teflon
- polystyrene

8

why do formed polymers not have a fixed molecular formula

- because their molecular masses can be anything
- ranging from thousands to millions

9

what do we do instead to show the number of monomer molecules reacting anyway

- we use the letter n
- which is written behind the monomer

10

what do you use to show the repeat unit of the polymer

- you place the repeating units into brackets
- square or curved

11

what do you write after the repeating unit of the polymer in the bracket

the letter n as a subscript

12

what detail needs to be met when drawing the repeating unit of the polymer inside brackets

- the covelant bonds on the carbon atoms needs to be shown passing through the brackets
- this indicates that there is another repeating unit joined to the molecule

13

if you are given a polymer with several repeating units shown, how would you identify the monomer it is made from

- look for a pair or carbon atoms next to each other
- and the four atoms or groups of atoms joined to them
- the monomer structure is then all of these atoms
- but with a double bond between the carbon atoms

14

when you draw the monomer, do you draw it in brackets and write the subscript n and why

- no you dont
- because this is only showing part of the structure
- and not just the repeating unit

15

what is the difference between how you draw the atoms or groups of atoms bonded to the two main carbon atoms when its a monomer and the repeating unit of a polymer

- for the monomers with double bonds you draw the molecules with angles of 120 degrees between the bonds
- but with the repeating unit of the polymer you draw the bonds at 90 degrees

16

what is the definition of a monomer

small molecules that combine together to form a polymer