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Question 29.SE.6: What is the structure of the polymer formed from lactic acid...

What is the structure of the polymer formed from lactic acid, a naturally occurring compound obtained from carbohydrates?

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Analyze We are given the structure of lactic acid and asked to derive the structure of the polymer made through self-condensation.

Plan Identify functional groups capable of forming a condensation polymer, then draw the polymer linking these functional groups up.

Solve Identification of the alcohol and carboxylic acid functional groups is important to determine the place of condensation. Condensation occurs by the formation of ester groups.

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