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Summary Polyesters and polyamides
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polyesters t polyamides rly usand
est polyamides
o andpolyamidesare
yester two condensation
important onanindustrial
polymersmade scalecarboxylic theirderivativesarecommon
acidsand theirpreparation
for
staringmaterials
condensation
isthe
polymerisation
ofmonomerswithlossofasmallmoleculeusuallywaterthecondensationorhydrogenchlorideincondensationpolymerisationtwodifferentfunctionalgroups
joining areneeded
ten
owes
whenmatingapolyester are
men
mono joined anic
together ester
by chainto
agesinalong the
tom p olymer canbemadefromonemonomercontainingbothacarboxylicacidand
Polyester r twomonomersonecontainingtwo
analcoholgroupofrom
acid
anoxylic the
g roupsand other twoalcoholgroups
containing
tenmade
ones onemonomercontainingtwodifferent
from functional
groups
orthis
typeofapolyesterformationonly isinvolvedcontainingbothdifferentfunctional
onemonomer groupsahydroxylgroup orandacarboxylicgroupcoots
lyionicacid panisthesimplestpolyesterofthistypemadebycondensationpolymerisationofitsmonomer
ugly isacidHochcoonGlycol
glycol isacidcontainsbothahydroxyl andacarboxylgroup
group
youcanseethe
Below formation
ofasectionofpolyglyconiacialfromitsmonomer groupin
thecarboxylicacid or
thealcon
onemoleculeofglycanandreactswith ofanothermoleculeofguy
group acidto
colic the
form ester an
linkage
water
ic i ii É É EE
tht
o o ci o s c o
ti i i H
ing Ink
actic
age
unit
repeat
soonalsoundergoescondensation polymerisationto
acidnoacat PanarebiodegradablepolymersLacticacidisderivedfrommaizemakingitsproductionmuchmore
formpolylactican'd PlasBothPiaand
than
ustainable derived
p olymers from fuels
fossil
ten
ayes made menearncontainingtwo
twomono
from f unctionalgroups
orthistype
ofapolyesterformationtwodifferentmonomersareinvolvedeachwithdifferentfunctionalgroups
onemonomerisadiolwithtwohydroxyl
groups
one isadicarboxylicacidwithtwocarbonylgroups
m onomer
isacondensationpolymermadefromthereactionbetweenthetwomonomersbenzeneincarboxylicacidHooch
Terylene tin and
coots emanenadintioceanontheformationofTerylene fromits
monomersis
shown Dun
below
ne a thedid withacarboxylgroupon
groupon
condensationreaction hydroxyl reacts the acidforminganesterlinkageandwater
dicarboxylic
Tmi
ene terephthalateis
polyethylene often to
shortened pet a ndhas many diverse
uses r f
anging romclothingtoplasticpet also
bottlesPolyesterare
forelectricalinsulation
used
it nai a s i Ifi o É o t tanistho
link
ester HH n
I
amides
dy
lyamidesarecondensationpolymersformedwhenmonomenarejoinedtogetherbyamidelinkagesinalongchaintoformthepolymerAswithpolyesterpolyamidescanbemadefromonemnom
so o
both carboxylicacidoracylchlorideandanaminegrouporfromtwomonomeronecontainingtwocarboxylicacidgroupsoracylchloridesand
containing
a the
othercontainingtwoamine
groups
amides
Toby onemonomerwithtwofunctionalgroups
from
Aminoacidscontainbothanamine anda carboxyliiacidgroupAminoacidsundergo
group toformpolypeptidesorproteinsApolypeptideorproteincontainsmanydifferentaminoacids
condensation polymerisation
alllinkedtogetherbyaminebondsWhenanamidebondformswaterislostHereisasectionofapolypeptidemadefromanumber
ofaminoacids
sN c c
t it o
in i e cheaton s
Nd d n c c n c c
i
ye Ig i
link
amide
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