Open Access
Subscription or Fee Access
Study of PLA and its Synthesis Kinetics
Abstract
In this project we studied about Polylactic Acid and its production kinetics. The most often found optically active hydroxycarboxylic acid is lactic acid (LA, also known as 2-hydroxypropionic acid). In the form of L-and D-Lactic Acid, this chiral molecule may be found. The building blocks of polylactide are carboxylic acid monomers produced by fermentation of sugars from renewable sources, such as sugar cane, beet root, or corn starch. These sugars include beet sugar, cane sugar, and others. Stereoisomers made from PLA include: (1) Poly (L-lactide (PLLA), (2) Poly (D-lactide) (PDLA), and (3) Poly (DL-lactide (PDLLA). There are many ways to obtain poly-lactic acid, an
aliphatic polyester: Direct polycondensational reaction Typically, it produces small relative molecular mass polymers, which may subsequently be changed into comparatively higher molecular mass polymers by the presence of chain coupling agents. Polymerization that opens rings Lactide monomer is initially formed, and after that, formed lactide is commonly
subjected to ROP with metal alkoxides acting as catalysts, resulting in high comparative molecular mass polyester, or PLA. Organic solvents for azeotropic dehydrative condensation are added to the reaction mixture to speed up the elimination of water, resulting in a product with a greater relative molecular mass.
References
P.A. Fleury, “Bulk Polymerization of Methyl Methacrylate in a Kneader Reactor”, Presented at ANTEC 2006.
B.T. Safrit, “Prediction of Continuous Kneader Reactor Processes From Batch Data”, ANTEC 2007 Technical Paper # ANTEC-0425-2007.
D. Witzke, “Properties and Engineering of Polylactide Polymers”, Thesis, Michigan State University. 1996.
T. Mantourlias, A. Seretis, K. Karidi, S. Parouti, C. Kiparissides, “Lactic Acid Based Functional Copolymers”, Bioproducts 2nd Annual Meeting. 2008.
S. de Vos, P. Jansen, “Industrial-Scale PLA Production from PURAC Lactides”, 8th World Congress of Chemical Engineering. 2009.
J. Dorgan, D. Knauss, J. Janzen, J. Randal, B. Braun, O. Gruber “Perfecting PLA Properties: A Successful University Collaboration”, The Global Plastics Environmental Conference. 2004.
NatureWorks® PLA Injection Molding Guide for 3051D.
J. Conrad, “The Rheology, Degradation, Processing, and Characterization of Renewable Resource Polymer”s, Thesis, Clemson University. 2009.
C. Geankoplis, Transport Processes and Unit Operations. 1983.
Y. Aoyagi, K. Yamashita, and Y. Doi, “Thermal degradation of poly [(R)-3-hydroxybutyrate], poly[ caprolactone], and poly[(S)-lactide]”, Polymer Degradation and Stability, Vol 76, pp 53–59. 2002.
P. A. Fleury, D. U. Witte, H. Schildknecht, “Comparison of Devolatilization Technologies for Viscous Polymers”, ANTEC 2005 Technical Paper #100655. 2005.
B. T. Safrit, A. E. Diener, “Kneader Technology for the Direct Devolazliation of Temperature Sensitive Elastomers”, Rubber Division of the American Chemical Society, Inc. 180th Technical
Meeting, Paper #13. 2011.
M.H. Naitove, “Conference Report: Bioplastics Are Breaking Out of Their 'Green' Niche”, Plastics Technology. 2012.
H. Tsuji, Hydrolytic degradation. in Poly(Lactic Acid). Synthesis, Structures, Properties, Processing, and Applications (Eds: R. Auras, L.T. Lim, S. Selke, H. Tsuji), John Wiley & Sons, New Jersey 2010; p. 345.
S. Rajendran, V. Kannan, K. Natarajan, N. Durai, K. Kannan, S. Chandru, The Role of Microbes in Plastic Degradation, Taylor & Francis, London 2015; 341.
K.J. Jem Industrial development and applications of lactic acid and poly lactic acid “2009 Industrial Biotech Development Report,” China Acad., Science Publication, Beijing 2009; 353–
K.J. Jem, Y.X. Zhou “Status and Future Development of Bioplastic and Polylactic Acid Industry,” in China Industrial Biotechnology Development Report 2018 Chemical Industry Publisher, Beijing 2018; 180–199
PJCHEM Technical Report (2019)
Refbacks
- There are currently no refbacks.