How will you prepare PHBV? Give its use?

Explanation

(i) The biodegrable polymer PHBV (Poly hydroxy butyrate-co hydroxyl valerate) is prepared by the polymerisation of monomers 3 - hydroxy butanoic acid and 3 - hydroxy pentanoic acid.
`nCH_(3) - underset(OH)underset(|)(CH) -CH_(2)-COOH + n CH_(3) - CH_(2) -underset(OH)underset(|)(CH) -CH_(2) -COOH overset(-H_(2)O)to [-O-underset(CH_(3))underset(|)(CH)-CH_(2) - underset(O) underset(||)C -O - underset(CH_(2)-CH_(3))overset(CH_(2)-CH_(2))(|) -overset(C)underset(O)(||)-]_(n)`
(ii) It is used in orthopaedic devices and in controlled release of drugs.