Polymer Monomer Identification

00:00 1 marks

The polymer in question is formed by an addition reaction and its repeating unit can be described textually as \(-CH_2-C(CH_3)_2-\). This representation indicates that during polymerization, a C=C double bond in the monomer was converted into a single \(\sigma\)-bond to form the polymer backbone. By conceptually replacing the single bond of the repeating unit with a C=C double bond and reassigning the substituents appropriately, determine which alkene monomer was originally used to form this plastic.

A

H2C=C(CH3)2
B

CH3CH(CH3)2
C

(H3C)2C=C(CH3)2
D

(H3C)2C=CHCH(CH3)2

Hint Hint

Hint

Work backwards: conceptually replace the polymer’s \(-CH_2-CH-\) linkage with a C=C double bond and reassign the methyl substituents to recreate the original alkene structure.

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Answer Answer

Complete Answer

H2C=C(CH3)2

Mark Scheme Mark Scheme

Answer Explanation Answer Explanation

Examiner Tips Examiner Tips

Common Errors Common Errors