Influence of calcium carbonate nanoparticles on mechanical behavior of poly(lactic acid)/poly(butylene succinate) blend

Authors

  • Nattakarn Hongsriphan Faculty of Engineering and Industrial Technology, Silpakorn University
  • Thitipong Burirat Faculty of Engineering and Industrial Technology, Silpakorn University
  • Pirapat Niratsungnern Faculty of Engineering and Industrial Technology, Silpakorn University
  • Sirirat Trongteng Faculty of Engineering and Industrial Technology, Silpakorn University

Keywords:

PBS, PLA, Calcium carbonate nanoparticle, SEM

Abstract

PLA/PBS blends in various blend ratio (70:30, 50:50, and 30:70 wt%) containing calcium carbonate nanoparticles (nano-CaCO3) of 1 and 5 phr were prepared. Tensile tests with 3 strain rates and Izod impact test were carried out in order to investigate the influence of CaCO3 nanoparticles on mechanical behavior of nanocomposites under different deformation rates. Morphology and compatibility of nanocomposites were studied using SEM and DSC. It is found that PBS/PLA 50/50 wt% blends exhibited the highest percentage of elongation at break due to co-continuous phases as seen in SEM. CaCO3 nanoparticles were dispersed uniformly in polymer matrix although they showed agglomeration sizes in micro-scale. CaCO3 nanoparticles of 1 phr increased toughness of polymer matrix as evident in higher elongation at break in all straining rates and higher impact strength. This indicates lubricating effect of CaCO3 nanoparticles during the deformation of polymer samples. Nevertheless, adding CaCO3 nanoparticles of 5 phr showed positive effect to improve mechanical properties for brittle polymer matrix since they offered better molecular mobility to withstand applied stresses. However, NPCC of 5 phr gave negative effect on ductile matrix or low strain rates. This would be attributed to loss of molecular mobility during the deformation from nano-CaCO3 agglomeration.

Downloads

Download data is not yet available.

References

Bhatia, A., Gupta, R. K., Bhattacharya, S. N. and Choi, H. J. (2007). Compatibility of biodegradable poly (lactic acid) (PLA) and poly (butylene succinate) (PBS) blends for packaging application. Korea-Aust. Rheol. J. 19(3) : 125-131.

Eslami, H.; Kamal, M. R. (2012). Elogational rheology and mechanical properties of biodegradable PLA/PBSA blends. ANTEC 2012 - Proceedings of the 70th Annual Technical Conference&Exhibition. USA.

Chan, C.M., Wu, J.S., Li, J.X. and Cheung, Y.K. (2002). Polypropylene/calcium carbonate nanocomposites. Polymer. 43(10) : 2981-2992.

Xie, X.L., Liu, Q.X., Li, R.K.Y., Zhou, X.P., Zhang, Q.X., Yu, Z.Z. and Mai, Y.W. (2004). Rheological and mechanical properties of PVC/CaCO3 nanocomposites prepared by in situ polymerization. Polymer. 45(19) : 6665-6673.

Jiang, L., Zhang, J. and Wolcott, M.P. (2007). Comparison of polylactide/nano-sized calcium carbonate and polylactide/montmorillonite composites : reinforcing effects and toughening mechanisms. Polymer. 48(26) : 7632-7644.

Kemal, I., Whittle, A., Burford, R.P., Vodenitcharova, T. and Hoffman, M.J. (2009). Toughening of unmodified polyvinylchloride through the addition of nanoparticulate calcium carbonate. Polymer. 50 : 4066 – 4079.

Lee, S. and Lee, J.W. (2005). Characterization and processing of Biodegradable polymer blends of poly (lactic acid) with poly (butylene succinate adipate). KoreaAust. Rheol. J. 17(2) : 71-77.

Downloads

Published

2013-06-30

How to Cite

[1]
N. Hongsriphan, T. Burirat, P. Niratsungnern, and S. Trongteng, “Influence of calcium carbonate nanoparticles on mechanical behavior of poly(lactic acid)/poly(butylene succinate) blend”, J Met Mater Miner, vol. 23, no. 1, Jun. 2013.

Issue

Section

Original Research Articles