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Topic: The name of the polymer obtained from polymerization of 3-hydroxybutanoic acid.  (Read 2207 times)

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Offline Varlam

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The name of the polymer obtained from polymerization of 3-hydroxybutanoic acid.
« on: October 28, 2018, 12:53:45 PM »
What is the name of the polymer obtained from the polymerization of 3-hydroxybutanoic acid. Also, is this polymer an ester? I know ester is formed by the reaction of alcohol and carboxylic acid. However, the monomer 3-hydroxybutanoic acid has both hydroxyl and carboxyl functional groups, that's why it's confusing.
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Offline chenbeier

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Re: The name of the polymer obtained from polymerization of 3-hydroxybutanoic acid.
« Reply #1 on: October 28, 2018, 01:05:10 PM »
The product is Poly-(R)-3-hydroxybutyrate (P3HB).
Why confusing the carboxyl group of one acid react with the OH-group of the next acid molecule.
« Last Edit: October 28, 2018, 01:19:33 PM by chenbeier »
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Offline Varlam

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Re: The name of the polymer obtained from polymerization of 3-hydroxybutanoic acid.
« Reply #2 on: October 28, 2018, 01:10:27 PM »
Quote from: chenbeier on October 28, 2018, 01:05:10 PM
The product is Poly-(R)-3-hydroxybutyrate (P3HB).
Why confusing the carvobyl group of one acid react with the OH-group of the next acid molecule.

What does R stand for?
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Offline chenbeier

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Re: The name of the polymer obtained from polymerization of 3-hydroxybutanoic acid.
« Reply #3 on: October 28, 2018, 01:17:12 PM »
R stands for rectus (latin) = right, because the molecule is chiral. There is also a S-product existing S stand for sinister = left.
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Offline Varlam

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Re: The name of the polymer obtained from polymerization of 3-hydroxybutanoic acid.
« Reply #4 on: October 28, 2018, 01:23:11 PM »
Quote from: chenbeier on October 28, 2018, 01:17:12 PM
R stands for rectus (latin) = right, because the molecule is chiral. There is also a S-product existing S stand for sinister = left.
Can it also be named as poly(3-hydroxybutanoic acid)
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Offline chenbeier

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Re: The name of the polymer obtained from polymerization of 3-hydroxybutanoic acid.
« Reply #5 on: October 28, 2018, 01:31:56 PM »
Yes it can.
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Offline Varlam

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Re: The name of the polymer obtained from polymerization of 3-hydroxybutanoic acid.
« Reply #6 on: October 28, 2018, 01:37:23 PM »
Quote from: chenbeier on October 28, 2018, 01:31:56 PM
Yes it can.
One last question. Is this polymer a polyester?
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Offline chenbeier

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Re: The name of the polymer obtained from polymerization of 3-hydroxybutanoic acid.
« Reply #7 on: October 28, 2018, 01:40:07 PM »
Of course, what else should it be.
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