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CAIE AS Chemistry 20.1 Addition Polymerisation Overview

Practise drawing addition-polymer repeat units from alkenes and deducing one or more monomers from a polymer chain, using structural changes to justify each answer.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • open the monomer C=C into two backbone single bonds while preserving every substituent
  • draw one bracketed repeat unit with continuation bonds crossing both brackets and include n
  • recover the monomer by selecting two backbone carbons and restoring C=C, including for copolymers

Covered syllabus points

20.1.1—Addition polymerisation20.1.2—Repeat units of addition polymers20.1.3—Monomer(s) present20.1.4—The difficulty of the disposal

20.1 Addition polymerisation question 1

[Maximum number: 3]

Organic compounds can be distinguished using chemical tests and analytical techniques.

Question (a)

(a)

D2 forms polymer Z when heated gently.

[ 3 ]

Question (i)

(i)

Identify the type of polymer that forms from D2.

[ 1 ]

Question (ii)

(ii)

Draw one repeat unit of polymer Z.

[ 2 ]

20.1 Addition polymerisation question 2

[Maximum number: 1]

X reacts with another reagent to form Y.

Molecules of Y react together to form addition polymer Z. The diagram shows the repeat unit of polymer Z.

repeat unit of polymer Z

repeat unit of polymer Z

Draw the structural formula of monomer Y.

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