Synthesis of Poly(lactic Acid) by Direct Polycondensation of Lactic Acid Using 1,1′-Carbonyldiimidazole, N,n,n′,n′-Tetramethylchloroformamidinium Chloride, and N,n′-Dicyclohexylcarbodiimide as Condensing Agents

Polymer Journal - United Kingdom
doi 10.1295/polymj.30.421