Effect of Poly(Hexamethylene Succinamide) on Crystallization of Poly(L-Lactic Acid)

Abstract:

Poly(L-lactic acid) (PLA) has good mechanical properties and is biodegradable. However, its crystallization rate is slow, crystallization period long, and its crystallization temperature high at 116 °C. Consequently, long processing cycles are required for the production of high crystallinity poly (L-lactic acid). Addition of nucleating agents is an efficient way to solve this problem. Aliphatic amide such as N,N-ethylenebis(12-hydroxystearamide) and ethylenebis-stearamide are reported as nucleating agents for poly (L-lactic acid). In this study, the effect of the aliphatic polyamide, poly (hexamethylene succinamide) on the crystallization behavior of PLA was investigated. Poly (hexamethylene succinamide) was synthesized by melt polymerization. Between one and ten weight percent poly (hexamethylene succinamide) was blended with poly (L-lactic acid) by melt extrusion. The crystallization temperature and crystallization period decreased with increasing poly (hexamethylene succinamide) content. The degree of crystallinity increased with the addition of poly (hexamethylene succinamide). A poly (hexamethylene succinamide) content of 5%wt provides optimum conditions for production of poly (L-lactic acid)-poly (hexamethylene succinamide) blend with good mechanical properties. The polymers obtained are entirely from renewable resources.

• Periodical: Key Engineering Materials (Volume 751)
• Pages: 302-307
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.751.302
• Online since: August 2017
• Authors: Panadda Yueagyen, Amornrat Lertworasirikul*
• Keywords: Crystallization, Nucleating Agent, Poly(Hexamethylene Succinamide), Poly(L-lactic acid)

References

[1] Q. Xing, X. Zhang, X. Dong, G. Liu and D. Wang, Low-molecular weight aliphatic amides as nucleating agents for poly(L-lactic acid): conformation variation induced crystallization enhancement, Polymer 53 (2012) 2306-2314.

DOI: 10.1016/j.polymer.2012.03.034

[2] J.Y. Nam, M. Okamoto, H. Okamoto, M. Nakano and A. Usuki, Morphology and crystallization kinetics in a mixture of lowmolecular weight aliphatic amide and polylactide, Polymer 47 (2006) 1340-1347.

DOI: 10.1016/j.polymer.2005.12.066

[3] D. He, Y. Wang, C. Shao, G. Zheng and Q. Li, Effect of phthalimide as an efficient nucleating agent on the crystallization kinetics of poly(lactic acid), Polymer testing 32 (2013) 1088-1093.

DOI: 10.1016/j.polymertesting.2013.06.005

[4] X. Shi, G. Zhang, C. Siligardi, G. Ori and A. Lazzeri, Comparison of Precipitated Calcium Carbonate/Polylactic Acid and Halloysite/Polylactic Acid Nanocomposites, Journal of Nanomaterial (2015) 1-11.

DOI: 10.1155/2015/905210

[5] M. Jollands and R.K. Gupta Effect of mixing conditions on mechanical properties of Polylactide/montmorillonite clay nanocomposites, Journal of Applied Polymer Science 118 (3) (2010) 1489-1493.

DOI: 10.1002/app.32475

[6] F. Feng and L. Ye, Structure and Property of Polylactide/Polyamide Blends, Journal of Macromolecular Science: Part B 49(6) (2010) 1117-1127.

DOI: 10.1080/00222341003609179

[7] J.G. Zeikus, M.K. Jain and P. Elankovan, Biotechnology of Succinic acid Production and Markets for derived Industrial Products, Applied Microbiology and Biotechnology 51 (1999) 545-552.

DOI: 10.1007/s002530051431

[8] M.J. Burk, A.P. Burgard, R.E. Osterhout and P. Pharkya, Microorganisms and Method for the Biosynthesis of adipate, Hexamethylenediamine and 6-Aminocaproic acid, Patent Application Poblication (2010) 1-37.

[9] B.K. Shrestha, H.M. Mousa, A.P. Tiwari, S.W. Ko, C.H. Park and C.S. Kim, Development of polyamide-6, 6/chitosan electrospun hydrid nanofibrous scaffolds for tissue engineering application, Carbohydrate Polymer 148 (2016) 107-114.

DOI: 10.1016/j.carbpol.2016.03.094

[10] M. Jiang, G. Chen, P. Lu and J. Dong, Preparation of aqueous soluble polyamides from renewable succinic acid and citric acid as a new approach to design bio-inspired polymers, Journal of Applied Polymer Science (2013) 1-10.

DOI: 10.1002/app.39807