Makchay P, Kajorncheappunngam S, Holasut K. Property of polylactic acid synthesized from 85% lactic acid via direct condensation polymerization. Eng Appl Sci Res [internet]. 2014 Jun. 24 [cited 2026 Sep. 23];40(2):237-45. available from: https://ph01.tci-thaijo.org/index.php/easr/article/view/19104