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Poly(lactic acid) (pla) has received much recent attention because the lactic acid monomer [ch3ch(oh)cooh] from which it is made can be obtained from carbohydrates rather than petroleum. this makes pla a more "environmentally friendly" polyester. select the correct structure of pla.

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transitionstate
PLA is a type of condensation polymer. Hydroxyl group of one lactic acid reacts with carboxylic group of second lactic acid and a ester is formed with the elimination of water molecule. And the reaction propagates with the increase in chain. And, the product formed is PLA as shown below.
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