Investigation on the Mechanical and Thermal Properties of PLA/Calcium Silicate Biocomposites for Injection Molding Applications
- 39 Downloads
In this study the influence of wollastonite (calcium silicate) on the mechanical and thermal properties of polylactic acid (PLA) biocomposites was investigated. The PLA/wollastonite biocomposites was prepared by melt blending technique. The interaction of wollastonite with PLA matrix was analyzed by Fourier transformed infrared spectroscopy. The mechanical properties such as tensile strength, percentage of elongation at break, tensile modulus, flexural strength, impact strength was determined. The thermal properties such as thermogravimetric analysis and differential scanning calorimetry were analyzed for the biocomposites. The PLA/wollastonite biocomposites exhibits high mechanical and thermal performance than the neat PLA. The biocomposites were also investigated through scanning electron microscope (SEM) micrographs to examine the adhesion between PLA and wollastonite. In addition, the results of SEM acquired are in good agreement with the data resulted from FTIR and impact strength of the biocomposites. The biocomposites shows improvement in crystallization and thermal stability than that of neat PLA and is suitable for melt processing and fabrication of injection molded products.
KeywordsPolylactic acid Wollastonite Biocomposites Thermal application Melt blending
Unable to display preview. Download preview PDF.
The author is gratefully acknowledge the financial support from University Grants Commission, New Delhi (UGC F.No.42-404/2013).
- 2.Gref R, Minamitake Y, Peracchia MT, Trubetskoy V, Torchilin V, Langer R (1994) Biodegradable long-circulating polymeric nanospheres. J Sci Marg 263(5153):1600–1603Google Scholar
- 7.Liang Xu L, Sun R, Zhang L, Yang DJ, Tan YF, Xiong CD (2008) Studies on poly(D, L-lactic acid)/wollastonite composites as a biomaterial. Iran Polym J 17(6):407–418Google Scholar
- 9.Narayan R (2002) Overview of biodegradable & biobased plastics technologies. Proceedings of the Tappi Place Conference 371–378Google Scholar
- 10.Mansor MK, Ibrahim NA, Yunus WMZW, Thevy RC (2011) Effect of triacetin on the mechanical properties, morphology and water absorption of poly(lactic acid)/tapioca starch composites. Malaysian Polym J 6 (2):165–175Google Scholar
- 23.Khalaf M N (2010) Effect of alkali lignin on heat of fusion, crystallinity and melting points of low density polyethylene (LDPE), medium density polyethylene (MDPE) and high density polyethylene (HDPE). J Thi-qar Sci 2(2):89–95Google Scholar
- 24.Kocic N, Kretschmer K, Bastian M, Heidemeyer P (2012) The influence of talc as a nucleation agent on the nonisothermal crystallization and morphology of isotactic polypropylene: The application of the Lauritzen-Hoffmann, Avrami, and Ozawa theories. J Appl Polym Sci 126(4):1207–1217CrossRefGoogle Scholar