Poly(methyl methacrylate) is an addition polymer. Its repeating unit is [−CH2−C(CH3)(COOCH3)−]n\mathrm{[-CH_{2}-C(CH_{3})(COOCH_{3})-]_{n}}[−CH2−C(CH3)(COOCH3)−]n.
Which is the monomer?
CH3−CH(CH3)COOCH3\mathrm{CH_{3}-CH(CH_{3})COOCH_{3}}CH3−CH(CH3)COOCH3
CH2=CHCOOCH3\mathrm{CH_{2}=CHCOOCH_{3}}CH2=CHCOOCH3
CH2=C(CH3)COOCH3\mathrm{CH_{2}=C(CH_{3})COOCH_{3}}CH2=C(CH3)COOCH3
CH3CH=C(CH3)COOCH3\mathrm{CH_{3}CH=C(CH_{3})COOCH_{3}}CH3CH=C(CH3)COOCH3
37 exam-style questions on Edexcel GCSE Chemistry 10.3 Polymers, covering 10.3.1 Addition polymerisation of alkenes, 10.3.2 Uses and properties of polymers, 10.3.3 Condensation polymers and polyesters, 10.3.4 Problems with polymers and recycling, and 10.3.5 Natural polymers: DNA, starch and proteins. Each one has a worked solution and a mark scheme showing where the marks go.