polymers

Question 1

define polymers

Answer 1

• long chain molecules made from lots of small molecules joined together

Question 2

define monomer

Answer 2

• small molecules that join together to make polymers

Question 3

define addition polymerisation

Answer 3

• formation of long chain molecules from lots of small molecules joining together with no other products

Question 4

what are polymers made of by ?

Answer 4

double bonds within alkenes

Question 5

what is the name of non-scientific name ?

Answer 5

trivial/commercial name

Question 6

show the repeating unit of polyethene

Answer 6

find in book

Question 7

show an equation of polymerisation

Answer 7

find in book

Question 8

draw a monomer structure of polyethene

Answer 8

find in book

Question 9

draw a polymer structure of polyethene

Answer 9

find in book

Question 10

draw the equation of polyethylene

Answer 10

find in book

Question 11

where does the n have to be on the polymer structure ?

Answer 11

on the outside of the bracket on the right

Question 12

where does n have to be on the monomer structure ?

Answer 12

on the left of the structure

Question 13

what is the conditions within low density poly(ethene) LDPE ?

Answer 13

200 °C,2000 atm , O2
flexible + soft

Question 14

what is the equation within LDPE ?

Answer 14

find in the picture

Question 15

what are example of LDPE in irl ?

Answer 15

bags,cling film

Question 16

what is the conditions within high density poly(ethene) HDPE ?

Answer 16

60°C , 2 atm , ziegla natta
stiffer + harder

Question 17

what is the equation within HDPE ?

Answer 17

find in the picture

Question 18

what are example of HDPE in irl ?

Answer 18

buckets , bottles

Question 19

what is an isotactic poly(propene) ?

Question 20

what are properties of isotactic poly(propene) ?

Answer 20

strong

Question 21

what are uses of isotactic poly(propene) ?

Answer 21

crates, ropes , carpet

Question 22

what is an atactic poly(propene) ?

Question 23

what are properties of atactic poly(propene) ?

Answer 23

softer,lower melting point

Question 24

what are uses of atactic poly(propene) ?

Answer 24

less uses (e.g. tape, sealants , waterproof coatings )

Question 25

draw an atactic poly(propene)

Question 26

draw an isotactic poly(propene)

Question 27

how are molecules packed in an LDPE ?

Answer 27

- loosely packed due to branching

Question 28

how are molecules packed in an HDPE ?

Answer 28

- molecules tightly packed

Question 29

what are the advantages of synthetic polymers ?

Answer 29

- they're unreactive e.g. - food doesn't react with the PTFE coating on pans - plastic windows don't rot

Question 30

what is also a problem with the advantage of synthetic plastic ?

Answer 30

- the lack of reactivity leads to a problem of them not being biodegradable --> meaning difficult to dispose of

Question 31

how much plastic waste is produced in the UK each year ?

Answer 31

- over 2 million tonnes

Question 32

what is it important to do with the waste ?

Answer 32

- find ways to get rid of the waste while minimising environmental damage

Question 33

what approaches can be taken to get rid of plastic waste ?

Answer 33

- waste plastics can be buried - waste plastics can be reused - waste plastics can be burned

Question 34

draw the flowchart of approaches of getting rid of waste

Answer 34

find in textbook :)

Question 35

why is landfill used to deal with waste plastics ?

Answer 35

- when difficult to separate from other waste - not in sufficient quantities to make separation financially worthwhile - too difficult technically to recycle

Question 36

what is a problem with the amount we waste we generate ?

Answer 36

- becoming more and more of a problem which means there is a need to reduce landfill as much as possible

Question 37

what are many plastics made of hence ?

Answer 37

- from non-renewable oil fractions hence it makes sense to reuse as much as possible

Question 38

how can plastics be reused ?