polymers Flashcards Preview

Organic Chemistry Year 2 > polymers > Flashcards

Flashcards in polymers Deck (18)
Loading flashcards...
1

what is condensation

small molecule eliminated to form a larger one

2

how many monomers are condensation polymers usually formed from

2

3

what properties do these monomers forming condensation polymers have

each has 2 functional groups

4

linkage in polyester

ester linkage
RCOOR'

5

what are the 2 monomers which form a polyester

diol and dicarboxylic acid

6

monomers terylene made from

benzene-1,4-dicarboxylic and ethane-1.2-diol

7

what is terylene used for

fibre for making clothes

8

linkage in a poly amide

peptide linkage

9

what are the 2 monomers used to form a polyamide

diamine and dicarboxylic acid

10

which monomers is nylon-6,6 made from

1,6-diaminohexane and hexanedioic acid

11

what is Kevlar used for

body armour, helmets, oven gloves

12

which monomers is Kevlar made from

1,4-diaminobenzene and benzene-1,4-dicarboxylic acid

13

why is Kevlar so strong

rigid chains and close packing of flat aromatic rings

14

why are polyalkenes not biodegradable

non polar C-H and C-C bonds

15

why is it bad to burn polyalkenes

releases CO2, CO, C and other toxic chemicals from monomers

16

four stages needed when recycling polymers

collected
sorted
melted
reformed

17

advantages of recycling polymers

energy and manpower is needed for collecting, sorting and melting the polymers, making it expensive
can only be done a few times

18

hydrogen bonding between polyamides

both C=O and N-H are polar bonds, as N electronegativity > H and o is greater than Cs