Polymerisation Flashcards
condensation polymers
dicarboxylic acid + diols –> polymers + water
addition vs condensation polymer
PVC = addition polymer = not biodegradable
PLA = condensation polymer = is biodegradable
C-C bonds
Carbon carbon bonds = strong and non-polar = difficult to break and unreactive
hydrolysis of polyesters etc
Water from air and soil can hydrolyse polyamides and polyesters
why is it biodegrdable
-ester/amide links contain polar C=O bonds that can react with nucelophiles to break the polymer chain
Not biodegradable = non-polar C-C bonds
Single monomer unit = 1 oxygen and 1 carbonyl group
amide
Amide = C=O-N-H
what is required to make a condensation polymer
2 different monomers which each have 2 functional groups
Kevlar
very strong but lightweight
draw the repeating unit =
without the brackets + n
polyester
-dicarboxylic acid + diol
-ester links O=C-O + H2O
-catalysts for condensation polymer = sulfuric acid
naming addition polymers
-naming addition polymers using the monomer e.g polyethene
polyamide
-dicarboxylic acid + diamine
Ethane-1,2,-diol =
HOCH2CH2OH
addition polymer
An addition polymer forms when unsaturated
monomers react to form a polymer
Monomers contain C=C bonds
poly(alkenes)
Poly(alkenes) are chemically inert due to the strong C-C and C-H
bonds and non-polar nature of the bonds and therefore are
non-biodegradable.
