Carbodiimide additive to control hydrolytic stability and biodegradability of PLA |
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| Affiliation: | 1. Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic;2. Environmental Protection Engineering, Faculty of Technology, Tomas Bata University in Zlín, nám. TGM 5555, 760 01 Zlin, Czech Republic;1. Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea;2. Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 08826, Republic of Korea;3. Institute of Engineering Research, Seoul National University, Seoul 08826, Republic of Korea;1. School of Packaging, Michigan State University, East Lansing, MI, 48824-1223, United States;2. Chemistry Department, Michigan State University, East Lansing, MI, 48824-1223, United States;3. Centro de Investigación en Alimentación y Desarrollo, A.C., Apdo. Postal 1735, Hermosillo, Sonora, 83304, Mexico;4. Saint Gobain Performance Plastics, Aurora, OH, 44202-8001, United States;1. Institute of Polymers and Composites/I3N, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal;2. Centre/Department of Chemistry University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal;3. Graphene and Nano-materials Research Center – Mackgraphe, Mackenzie Presbyterian University, São Paulo, Brazil;1. Shanghai Key Laboratory of Multiphase Materials Chemical Engineering and Production Engineering Department, School of Chemical Engineering, East China University of Science and Technology, Shanghai, PR China;2. Shanghai Key Laboratory of Catalysis Technology for Polyolefin, Shanghai Research Institute of Chemical Industry, Shanghai, PR China |
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| Abstract: | ![]()
Enhanced durability of bio-based polylactic acid (PLA) is one of the prerequisites to be a considered as alternative to petroleum-based polymers in long time application. The effect of bis(2,6-diisopropylphenyl)carbodiimide (BDICDI) additive in various concentration on the extent of hydrolytic stabilization and subsequent degradation kinetics of PLA was studied in the process of abiotic hydrolysis and microbial decomposition under composting conditions. The study showed that BDICDI acts as an efficient stabilizer suppressing the hydrolytic scission of ester bonds of PLA in both degradation processes tested, especially at concentrations above 1.5% w/w. Within the stabilization period which strongly depends on concentrations of BDICDI, suppression of hydrolytic degradation also triggered preservation of thermal and mechanical properties. After the period of stabilization as the dose of stabilizer is depleted, probably via reaction with water molecules and carboxylic groups, the material was hydrolyzed at a comparable or even slightly higher rate than pure PLA. By applying the appropriate amount of BDICDI, the approximate duration of stabilization could be set to suit the desired requirements of the final product. |
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| Keywords: | Polylactide Anti-hydrolysis agent Carbodiimides Hydrolysis Biodegradation |
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