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Chemistry · Oct / Nov 2021 · Paper 11 · Question 40

5070Polymers

P is a polymer that: • has six carbon atoms in each of the monomers from which it is formed • is not a polyester • is formed using condensation polymerisation. What is the partial structure of P?

  1. AA polymer with the repeat unit: —C(=O)—(CH2)4—C(=O)—O—(CH2)6—O—
  2. BA polymer with the repeat unit: —C(=O)—(CH2)6—C(=O)—NH—(CH2)6—NH—
  3. CA polymer with the repeat unit: —C(=O)—(CH2)4—C(=O)—NH—(CH2)6—NH—
  4. DA polymer with the repeat unit: —CH(CH3)—CH(C3H7)—CH(CH3)—CH(C3H7)—

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Correct answer: C. A polymer with the repeat unit: —C(=O)—(CH2)4—C(=O)—NH—(CH2)6—NH—

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