POLYMER IMPORTANT NOTE Flashcards
which parts do you take out when forming polymers
the parts that disappear and arent in the bond .
what do you do before drawing out condesnation polymers
Make sure that the condensation groups are located on the oppsite sides of the molecule
two types of polymers…
addition and condensation polymers
Note : for addtion polyerms; orientate it so that the c=c bond IS IN THE MIDDLE
WATCH; (8;04)
https://www.youtube.com/watch?v=-mLdH0F2gOU&t=3s
NOTE: TO GET MARKS, STATE WHICH IS ADDITION POLYMER AND WHICH IS CONDENSATION POLYMER
draw the repeat structure of this
remember: there can be two points of condensation therefore the polymer could have two bits cut off to show that condensation has happened at two points. This is the repeat structure
NOTE: seperate ONLY the ester linkages (eg carboxylic acid and NH2 or OH, YOU CANNOT seperate non ester linkages eg… the“NH” group in the middle
why is the NH2 group positive? BECAUSE its in an acidic environment therefore its protonated
(the NH that was originally on the benzene ring has also become protonated to NH2+ )
define condensatiokn polymer
monomers that bond to form a polymer as well as another small molecuel eg water or hydrochloric acid
formation of addition polymers
formed by monomers with Carbon carbon DOUBLE BONDS ,
(if you noticed that a carbon carbon double bond has abeen removed somewhere in the polymersiation process, then that suggests addition polymerisation of two moelcuels with double bonds )
video of this example… ( on how to seperate the momomers involved in the addition polymersiation of this molecule…)
https://www.youtube.com/watch?v=yXMVAytyvvw
13:20
MUST WATCH
ADDITION POLYMERSIATION = ADDITION OF TWO DOUBLE BONDED ORGANIC COMPIUUNDS (eG STEREOISOMERS )
apart from hydroylsis, how else can polymers be degraded?
Photodegradable/ by UV light
how do you go about answering polymer exam questiosn
ARRANGE THE POLYMERS SO THAT ITS SYMETTRICAL AND IN STRAIGHT CHAIN FORM! (MAKES IT EASIER TO DRAW OUT )(
REMEMBER: when in doubt, its probably an addtion polymer !
another important note…
draw double bonded compounds AS those criss cross structure eg..
+ dont bother wrirting out the ful COOH functional group struture
just weite “cooh” the functional group!
Explain why scientists now think that polymers such as PGA are better for the environment than hydrocarbon-based polymers.
photodegradeable, biodegradeable !!!!!!!!!!!!!!!
