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Flashcards in Using Alkenes to make Polymers Deck (26):
1

What useful process can you do with alkenes?

Polymerisation

2

What is the name for small alkene molecules?

Monomers

3

Define 'monomers'

Small alkene molecules

(they contain a double carbon bond)

4

Describe the process of polymerisation

Joining together MONOMERS to form very large molecules (POLYMERS)

5

Why are alkenes able to act as monomers?

Because monomers contain a carbon double bond

6

Describe polymerisation in terms of bonds

The carbon double bonds in the monomers break and join in an end to end reaction

7

What is polymerisation also known as?

Additional polymerisation

8

What are polymers also known as?

Additional polymers

9

Are monomers saturated or unsaturated?

Monomers are UNSATURATED

10

Are polymers saturated or unsaturated

Polymers are SATURATED

11

Name 3 monomers and the polymer they become through polymerisation

1. ethene → polyethene

2. propene → polypropene

3. butene → polybutene

12

Different polymers have different _______

Different polymers have different PROPERTIES

13

What are the 2 things the physical properties of a polymer depend on?

1. The alkene it's made from

2. The temperature and pressure of polymerisation

14

Give an example of how the properties of a polymer are affected by the alkene it's made from

Polyamides are usually stronger than poly(ethene)

15

Give an example of how the properties of a polymer are affected by the temperature and pressure of polymerisation

Poly(ethene) made at 200oC and 2000 atmospheres pressure is FLEXIBLE and has LOW DENSITY

BUT

when made at 60oC and a few atmospheres pressure with a catalyst it is RIGID and DENSE

16

Light, stretchable polymers such as ___ ___ ___ are used to make ___ ___ .

Light, stretchable polymers such as LOW DENSITY POLY(ETHENE) are used to make PLASTIC BAGS .

17

Elastic polymer fibres are used to make ____ ____ for ____

Elastic polymer fibres are used to make LYCRA fibre for tights

18

Name 3 types of polymer and their uses

1. Waterproof coatings -> fabrics

2. Dental polymers -> resin in TOOTH FILLINGS

3. Polymer hydrogel wound dressing -> keep wounds moist

19

Name an example of a polymer that is a SMART MATERIAL, and explain what it does

Memory foam gets softer as it gets warmer

20

What can memory foam be made into and what does this mean they do?

Mattresses that mould to your body when you lie on them

21

Name a negative and a positive of using polymers

Pro: Cheap

Con: Aren't biodegradable

22

What 2 things can we do about the problem with polymers and biodegradability?

1. We can re-use them as many times as possible

2. We can recycle them

23

Things made from polymers are usually ______ than things made from ____ . However, as crude oil resources get _____ ____, the price of crude oil will ______ .

Things made from polymers are usually CHEAPER than things made from METAL. However, as crude oil resources get USED UP, the price of crude oil will RISE.

24

What does the rising cost of crude oil mean?

That crude oil products like polymers will get MORE EXPLENSIVE

25

What is the problem, besides cost, with using crude oil to make polymers?

It may well be that one day there won't be enough crude oil for fuel AND plastics AND all the other uses

26

Name 2 naturally occurring polymers

1. Rubber

2. Silk