Synthèse d’un polyester : l’acide polylactique Formule de l’acide polylactique : O O ║ ║ HO – CH – C – O – CH – C – OH │ │ CH3 CH3 O O O O ║ ║ ║ ║ HO – CH – C – O – CH – C – O – CH – C – O – CH – C – OH │ │ │ │ CH3 CH3 CH3 CH3 O O O O O ║ ║ ║ ║ ║ HO – CH – C – O – CH – C – O – CH – C – O – CH – C – O – CH – C – OH │ │ │ │ │ CH3 CH3 CH3 CH3 CH3 O O O ║ ║ ║ HO – CH – C – O – CH – C – O – CH – C – OH │ │ │ CH3 CH3 CH3 O ║ HO – CH – C –OH │ CH3 O ║ HO – CH – C – OH │ CH3 O ║ HO – CH – C – OH │ CH3 O ║ HO – CH – C – OH │ CH3 O ║ HO – CH – C – OH │ CH3 etc. Equation de réaction : O ║ HO – CH – C – OH │ CH3 n O ║ – CH – C – O – │ CH3 n + (n-1) H2O motif