Abstract
This study aimed to improve the brittleness and thermal stability of poly(lactic acid) (PLA) by inclusion of poly(butylene succinate) (PBS) and microcrystalline cellulose (MCC). Of the three PLA/PBS blends (10, 30 and 50 wt% PBS) evaluated, the 70/30 wt% blend exhibited the highest impact strength and elongation at break, but a lower thermal stability compared to that of the pure PLA. Scanning electron microscopy analysis confirmed the better compatibility of this 70/30 PLA/PBS blend. This blend was further filled with MCC. Based on thermogravimetric analysis, the thermal stability of the 70/30 PLA/PBS blend was improved by the addition of MCC [optimal at five parts by weight per hundred (phr)] and further still by the addition of the chain extender, Joncryl™, at 0.5 phr. The 70/30/5/0.5 PLA/PBS/MCC/Joncryl™ composite exhibited the highest impact strength, while the elongation at break was acceptable.
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Acknowledgments
The authors gratefully acknowledge the 90th Anniversary of Chulalongkorn University Fund (Ratchadaphiseksomphot Endowment Fund) for financial support and the National Metal and Materials Technology Center for material and instrument supports. We would like to thank Dr. Robert Butcher for correcting, suggesting and proof reading the article.
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Chaiwutthinan, P., Pimpan, V., Chuayjuljit, S. et al. Biodegradable Plastics Prepared from Poly(lactic acid), Poly(butylene succinate) and Microcrystalline Cellulose Extracted from Waste-Cotton Fabric with a Chain Extender. J Polym Environ 23, 114–125 (2015). https://doi.org/10.1007/s10924-014-0689-0
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DOI: https://doi.org/10.1007/s10924-014-0689-0