12O- Polymers

Question 1

What molecules produce condensation polymers

Answer 1

Dicarboxylic acids with diols
Dicarboxylic acids with diamines
Amino acids (polypeptide)

Question 2

Repeating unit for polyesters eg terylene

Answer 2

Monomer 1 HO-R-OH (H always lost from diol)
Monomer 2 HOOC-R-COOH (OH always lost from carboxyl group)

Repeating unit -OC-R-CO—O-R-O- (long bond is ester bond)

Question 3

Repeating unit for polyamides eg nylon 6,6

Answer 3

Monomer 1 NH2- R- NH2 (only H is lost from amine)
Monomer 2 HOOC-R-COOH (OH lost from carboxyl group)

Repeating unit -CO-R-CO—NH-R-NH- (long bond is a middle bond)

Question 4

Repeating units for polyamides eg Kevlar

Answer 4

Monomer 1 NH2-R-NH2 (H lost from amine group)

Monomer 2 HOOC-R-COOH (OH lost from carboxyl group

Repeating unit -NH- R-NH—CO-R-CO- (long line is the amide bond)

Question 5

Used of terylene, Kevlar and nylon,6,6

Answer 5

Kevlar, bullet proof vests and anti stab clothing
Terylene, plastic bottles and raincoats
Nylon 6,6, clothing and carpets

Question 6

Properties of polyalkenes linking to disposal

Answer 6

Chemically inert
Non biodegradable

Question 7

What is a good property about polyesters and polyamides

Answer 7

Can be broken down by hydrolysis
Biodegradable

Question 8

Why can polyesters and polyamides be hydrolysed but polyalkenes can’t

Answer 8

Strong, non polar C-H and C-C bonds

Question 9

Pros and cons of recycling

Answer 9

Ads
More economical as crude oil is expensive
Reduces waste going to landfill

Disads
Collected, transported, sorted, requires manpower

Question 10

Pros and cons of landfill

Answer 10

Pros
Most common

Cons
Reaching capacity
Most polymers take many years to break down

Question 11

Pros and cons of incineration

Answer 11

Pros
Rubbish burned to generate electricity
Volume of rubbish is reduced

Cons
Releases toxic gasses