Which of the following monomer will make PHBV more flexible?

β -

hydroxy butyric acid

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β -

hydroxy velaric acid

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Glycine

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Lactic acid

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Solution

The correct option is B $β -$ hydroxy velaric acid
PHBV is a biodegradable polymer used for speciality packaging made up of the following:
$β$ -hydroxybutyric acid + $β$ -hydroxyvelaric acid
$↓$
PHBV
In which, $β$ -hydroxy velaric acid makes polymer more flexible.

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