21 terms

iGCSE Chemistry: Condensation polymers - core

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Describe, in terms of structure and bonding, what happens when ethene molecules are converted into poly(ethene)
One bond in the double bond breaks. Monomers join together to form a long chain. Polymer contains only single bonds
Explain what is a monomer
Monomers are the many small molecules (such as ethene) which add together to make a polymer
Explain what is an addition polymer
An addition polymer is large molecule made by adding many small molecules (each containing a double bond) to form one much larger molecule
What is the process of joining monomers together called?
Polymerisation
Draw the equation to show the formation of poly(ethene)
Draw the equation to show the formation of poly(propene)
Draw the repeating unit for poly(but-2-ene)
Draw the repeating unit for poly(chloroethene)
Draw the repeating unit for poly(ethene)
Draw the displayed formula of the monomer used to make poly(but-1-ene)
Draw the displayed formula of the monomer used to make poly(propene)
Explain why addition polymers are hard to dispose of
They are inert as they have strong C-C bonds. This makes them non-biodegradeable.
What is meant by the term biodegradable?
The break down of a substance by microorganisms
(Triple only) During condensation polymerisation, what else forms other than the polymer?
A small molecule such as H₂0 or HCl
(Triple only) Nylon is a polymer that isn't formed by addition polymerisation. How is it formed?
Condensation polymerisation
(Triple only) What type of reaction is used to form nylon?
Condensation polymerisation
(Triple only) Draw the displayed formula for hexane-1,6-dioic acid
(Triple only) Draw the displayed formula for hexane-1,6-diol
(Triple only) Write the structural formula for the polyester formed from the reaction of ethanedioic acid and ethanediol
(Triple only) What is a biopolyester?
A polyester which is biodegradable
(Triple only) What is the name of a biodegradable polyester?
Biopolyester