6.2.3 Polyesters and polyamides Flashcards
what 2 products form a polyester
dicarboxylic acid
diol
how do you form the monomers from a polyester
break the ester link and add the groups
how do you know whether to form a single or 2 monomers
2 carbonyl groups=2 monomers
how do you form a polyamide
dicarboxylic acid and diamine
how do form a monomer from a polyamide
break the amide link
products for an acid hydrolysis of a polyamide
NH3+ to amine group
OH to carbonyl group
products for an acid hydrolysis of a polyester
add OH
add OH to carbonyl group
products for an base hydrolysis of a polyamide
and H to NH
add O- and Na/K+
products for an base hydrolysis of a polyester
Add OH
add O- and Na/K +
How to work out if a molecule is an addition or condensation polymer
It’s an addition polymer if it’s two carbons in length and
it’s a condensation polymer if it’s more than two carbons in length
why are amides more temperature resistant
Amides can form hydrogen bonds whereas amine forms London forces hydrogen bonds are stronger than London forces or hydrogen bonds require more energy to outcome
why are polyesters and polyamides biodegradable
The amine and amid links can be hydrolszed during condensation reaction
