Determine the average Degree of Polymerization (DP) for a perfectly linear, unbranched chain of poly — Polymers Chemistry Question
Question
Determine the average Degree of Polymerization (DP) for a perfectly linear, unbranched chain of polyacrylonitrile (PAN) that has an exact molecular weight of 106,000 u. (Atomic weights: C=12, H=1, N=14).
Answer: B
💡 Solution & Explanation
The monomer is acrylonitrile ($CH_2=CH-CN$). Its molar mass is $(3 \times 12) + (3 \times 1) + 14 = 53$ g/mol. The Degree of Polymerization (DP) = Total Molecular Weight / Monomer Weight = $106,000 / 53 = 2000$.
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