Amino acids, proteins and polymers

Question 0

How can you control the extent of condensation polymerisation?

Answer 0

adjust [monomers] in inert organic solvent or adjust pH. Low pH –> -NH3+ - unreactive towards carbon of C=O.

Question 1

Between which groups can cross links form in Kevlar? What conditions are needed?

Answer 1

-OH on one monomer unit and -COOH on other –> ester link. Warm + concentrated H2SO4.

Question 2

How can you control cross linking?

Answer 2

adjust the temperature of the mixture after H2SO4 addition.

Question 3

When an ester link forms is the -OH split in the carboxylic acid or the alcohol group?

Answer 3

Alcohol.

Question 4

What can polypropemanide, polypropenoic acid and polylactic acid be used for?

Answer 4

disposable nappies, gels in soil of plant pots, (surgical stitches).

Question 5

what can polyethanol be used for?

Answer 5

disposable laundry bags and detergent capsules.

Question 6

what conditions are required to make addition polymers?

Answer 6

organic peroxide inhibitor - frs - high t and p.

Question 7

why are polyamide chains strong?

Answer 7

The amide bonds are strong.