L9 :Polymer preparation: Chain growth - Polymers, Chemistry, Class 12 Video Lecture

hello friends this video on polymers
part 9 is brought you by exam viacom no
more here for exam now we have discussed
about the chain role in the step growth
polymerization reaction let's see some
of the examples for change with
polymerization reaction we'll see on the
preparation of polythene high density
low density or Teflon poly acrylonitrile
one probably one strain PVC immunize
your clean only then I hesitate all
these let's see the preparation of these
because they are important polymers
these polymers are taught by chain
reaction we'll also see these number of
monomers that are owned by step growth
polymerization reactions we'll see the
information of those as well it is start
with a polythene the low density 1 T so
polythene we have told you that this is
a tech polythene if you see is used here
one Max and this is also polythene ok so
how do you get quality polymerization of
the polymerization of the Clarion
organization he under high pressure and
that's why I am talking for low density
durian season a high pressure very high
pressure almost housing will be
positively at massification and
temperature is 3 to 5 l in this makeup
temperature and plus some oxygen trace
of oxygen and obviously since I told
that this is all chain rule so it needs
some catalyst to initiate the reaction
and deform the active eating here and
for that we use a parasite we can use
any website you lose then dr. excite to
act as catalysts so we talked about the
reaction mechanism in fact we have
talked about this we have mango anger
aside this game called fair upside what
happens is it breaks it works your PC
from this this bond rates and applies it
comes out with two cc's this again react
with form c6h5 this is this is my chain
initiation step once I have got this
these reacts with the N number of basis
to the standard something is got excited
again this is we acted for evening we
actually continue wrong we added a
number of these that is chain growth
estate and then we will change that
mission step where this reacted one more
of similar kind of this that this is n
this is n this is n and then for my
fella the - I would have to leave this
is the sky ch2 some K molecules of this
like there K is nothing but n plus n
plus you see this is the only thing
wonderful you get okay so these
low-density polyethylene chemically
inert and this tough but flexible also
were collector of electricity I also use
small is relating littering Oh apps is
used to make first we spot a little boys
mimes
this kind of waste this is the high
density poisons so if you talk about
high density nest is high in it is
pretty hard example this is high-density
high-densit high-density this is no
dancing song so I write this in high
density polyethylene box about high
density pollen it's on so in high
density polythene the polymerization
take place in the presence of again my
catalyst such as try hi
and and this take place and some hydro
carbon solvent also solvent okay
temperature is almost similar little
lower
III 3350 43 K and the pressure is also
low six to seven international so in the
case of low densely keen polythene we
saw that the pressure was very high one
thousand step but in this case the
pressure is no and the density is high
because of most packing but apart from
that the properties are the same the low
density faulting the hydrants deposit
both are non current of electricity with
a chemically inert but since the
close-packed is precisely this is harder
and tougher used to make buckets dust
bins the bottle caps typically the pipes
don't things is used hard plastic okay
the next is f log F flan is you must
have seen the in tencel's in the house
has Teflon pudding the car has a Teflon
coating you can end it from - crash
there are lot of applications of test
log Teflon in fact the oil seals the
gaskets in the gasket connect two
different pipes
this is used this oil seals listen we
use teflon in teflon in fact the word
came from action polymer is poly draw so
teflon work in PE came from this.f
this.o from less thorough
the empty floor and this is manufactured
by hitting tetra fluoro theme within
that is CFP one CFP straight ruffalo
attained when you heat this the presence
of that list high pressure you get FY
reaction is signal to the polythene
reaction okay these are also chemically
inert and that's why you see it is used
for coating the fine pad if it is not
chemically inert do not be use it will
be active output if it is asked elements
chemically in a nod you just say that
okay the theme of it can be their f1 is
used for cooking the hoe tenses that
means it should be chemically inert it
is resistant to attack there is
resistant to corrosion and that that's
why it is used in the utensils well it
is used for making oil seals gaskets
also a teflon coated cars bikes okay but
this actually teflon and Paroles to
composition when you heat this 300
degree Celsius that is something that
you only use for cooking but if you eat
this at a higher temperature a divorce
that this isn't one this is also
compared by the same chain growth
polymerization the next is the poly at
flow might try this was prepared by
chain growth free radical reaction okay
so this is from from a clove nitrite so
polymerization of a chromatin in the
presence of catalyst again the catalyst
can be peroxide here
so echo my trial the formula is ch 2
gives me in this is I know right type so
I cry la nitrile fabulous pair of sign
if you form this kingdom is the other
similar to the polythene and that Teflon
reaction here see this is a substitute
for real one layer is costly a
substitute for the real wood and making
chemica commercial fibers sweaters there
it is used only a final night right the
next important now polymer is only
trophy only problem is by the
polymerization of again puppy this is
from the war memorials protein this
protein here this is your protein and
protein when it is polymerized in the
presence of catalyst catalyst can be
tried aluminum and Biden the right yeah
I see a dune or try it hi aluminum 3 5
so this
polymerize it falls ch ch3 here goes to
here n molecules of these this is all
you talking right this is used for
packaging film also creating the
electrical insulating coating see the
wires and has the plastic and the
polymer actually in the spoiler is only
could be this non conductor of
electricity a that's why I refuse to
insulate it the next is poly stream
this is in Oliver which you can come
this one over study polymerization of
styrene using green window peroxide is
used here because it's a chain growth
polymerization reactions your reaction
is straight molecule using your vendor
peroxide which enemies yeah this bond
breaks at equals this Poly's to me it is
used to make comms electrical insulators
toys to diverse angle or if you handle
plastic handles in fact if you see a
brush glue brush handle is also polished
is hard
next is polyvinyl chloride this is
typically used to make pipes is also
used to make handbags this is little
soft little soft cottony soft and this
is made by the polymerization of the
line right so it's two double bonds here
this is the 9th right to do a
polymerization of this of you do a
polymerization instead of in place
presence of the oxide by the oxide
because the way the chain reaction will
get this is easy see polyline correct
okay this tough and flexible the next is
guna is buena has also formed the chain
growth reaction this is from from the
addition reaction of butadiene and
steering presence of sodium as a
catalyst is tidy this is of
so us camasta spectacle reaction
butadiene
this is buta dying and this is spy
okay this will react with Serena's
catalyst and all these butadiene for
this you guys let's see how it reacts I
want to go over the reaction mechanism
but just breathe
see there's a double bond here is double
one it's racing these few editors and
these develop on algebraic solutions
this is you and these people talk about
how the traces of unitless
okay this double bond is wrong as you
say a1 is also linear is fierce - we are
always double bonds ain't in this right
yes
now these two don't bear how would one
there is one this one is so I am these
my goodness
now this non where they act with is
nowhere of how one is perfect my busy
over the reaction this what you get is
ch2 this is a lone pair to form another
bond something you all know since eh
double bond c h single bonds v HT then
eh here c6 spy then series 2 and this
one very probably one something else and
enemies in one this kind of structure
nice automobile tires Footwear's this is
resistant to a passion hope you
understand the overall mechanism
so these bond break actually and will
form this kind of bond in this you go in
pairs informal game on these two lone
pairs are remaining now this long tables
on board with this these two don't wears
which are you getting down will actually
on bond them so let's see once again so
what I have done is this red color lone
pairs will form bond here straight once
these two black your wave form
this is on the mannahatta the black
colors see and these are rectangles
these are the red color Manzana right so
this I think in this race of this
reaction happen to the black ones they
want the latest in the next is neoprene
neoprene is also called or the Euro lean
and this obviously is form from moremore
called euro P so prepared by the
polymerization of Europeans see the
Philippine ch2 double bond CH sweeps to
just Chloe just little P and polymerize
s you get poly
okay this is this bond breaks this bond
breaks and and then this bond breaks is
all gone it's gone wrong these two
whatever is the lone pair forms a double
okay this is this bond breaks until
these were articles and this bottom is
mine so I get something like this so I
get something like this again these two
don't wear forms upon link these two em
so on there is gone these one pair is
likely or microphone chain poly
chloroprene also called you read it is
non inflatable it is the first
successful rubber such a gene that is
synthesized
first successful substitute it is even
in soluble in chloroform does high
temperature resistant is used in fact
we're very apparent in this revolution
this polygon the next is polyvinyl
acetate as the names disqualified asleep
is form our movement or denial acetate
denied as it is fierce to get Osio
this is the night acetate you are
punctuation of this you get only in my
recipe
okay this is a dressing and this use of
the panes poly - okay thank you
visit exam viacom to wash more we use
attend free online tests get three
cherry materials find two thousand
mentors and much more find self again