polymers

Question 1

what is condensation

Answer 1

small molecule eliminated to form a larger one

Question 2

how many monomers are condensation polymers usually formed from

Answer 2

2

Question 3

what properties do these monomers forming condensation polymers have

Answer 3

each has 2 functional groups

Question 4

linkage in polyester

Answer 4

ester linkage

RCOOR’

Question 5

what are the 2 monomers which form a polyester

Answer 5

diol and dicarboxylic acid

Question 6

monomers terylene made from

Answer 6

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

Question 7

what is terylene used for

Answer 7

fibre for making clothes

Question 8

linkage in a poly amide

Answer 8

peptide linkage

Question 9

what are the 2 monomers used to form a polyamide

Answer 9

diamine and dicarboxylic acid

Question 10

which monomers is nylon-6,6 made from

Answer 10

1,6-diaminohexane and hexanedioic acid

Question 11

what is Kevlar used for

Answer 11

body armour, helmets, oven gloves

Question 12

which monomers is Kevlar made from

Answer 12

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

Question 13

why is Kevlar so strong

Answer 13

rigid chains and close packing of flat aromatic rings

Question 14

why are polyalkenes not biodegradable

Answer 14

non polar C-H and C-C bonds

Question 15

why is it bad to burn polyalkenes

Answer 15

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

Question 16

four stages needed when recycling polymers

Answer 16

collected
sorted
melted
reformed

Question 17

advantages of recycling polymers

Answer 17

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

Question 18

hydrogen bonding between polyamides

Answer 18

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