organics -polymers Flashcards
what are addition polymers and how are they formed
long chain molecules made from joining together many shorter molecules together ti form a long chain molecule with nothing else produced
what are the monomers for addition polymers
-alkenes
-molecules with C=C
examples of addition polymers
-polyethene
-PVC
-polypropene
are addition polymers biodegradable
non-biodegradable - due to absence of polar bonds in the main chain - all bonds are C-C
what are condensation polymers and how are they formed
long chain molecules made from joining together many shorter molecules together to form a long chain molecule with some one small molecules also formed - often water
what are the monmers of condensation polymers
-dicarboxylic acids and diols
-dicarboxylic acids with diamines
-amino
examples of condensation polymers
-polyesters eg terylene
-polyamides eg nylon and Kevlar
are condensation polymers biodegradable
-biodegradable - due to the prescence of polar C-N or C-O bonds in the main chain
how is a polyamide formed
from a dicarboxylic acid reacts with an diamine
-water is released
-form linkage of C=O-N-H
what is another way that polyamides can be formed
from amino acids
-this is because they contain a carboxylic acid group and an amine
-single acid used then a common repeat unit formed
how are polyesters formed
-dicarboxylic acid and diol
-form water
-have an ester linkage
what monomers combine to make nylon 6,6
1,6-diaminohexane and hexane-1,6-dioic acid
what monomers combine to form terylene or PET
ethane-1,2-diol and benzene-1,4-dicarboxylic acid
what monomers combine to form Kevlar
1,4-diaminobenzene and benzene-1,4-dicarboxylic acid
how is Kevlar strong
forms hydrogen bonding bwt N-H and O on the carbonyl
