How to deduce the polymerisation reaction for any alkene
3 marks · EasyPoly(propene) is a polymer formed from propene.
Draw the displayed formula of a propene molecule.
Write the structural formula for the repeat unit in poly(propene).
Name one use of poly(propene).
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) — · must show all atoms shown: CH2=CHCH3, full displayed formula (single/double bonds drawn)
(b) (–CH2–CH(CH3)–)n · must show correct repeat unit, bonds shown or clear
(c) used to make ropes OR used to make crates OR used in packaging · must show appropriate common use
Common mistakes: Showing double bond in polymer repeat unit; Giving poly(propene) as monomer
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Correct displayed formula for propene, all bonds shown.
B1 (b) · 1 mark · Correct structural formula for the repeat unit of poly(propene).
B1 (c) · 1 mark · Gives one correct use of poly(propene), e.g. ropes or crates.
Worked solution
a) The displayed formula for propene is:
b) The structural formula for the repeat unit in poly(propene) is:
c) Example use: poly(propene) is used to make ropes.