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Effects of Alanine Methyl Ester Hydrochlorides on Thermal Behaviour of Biodegradable Poly(L-lactic Acid)
Corresponding Author(s) : Yan-Hua Cai
Asian Journal of Chemistry,
Vol. 25 No. 3 (2013): Vol 25 Issue 3
Abstract
Alanine methyl ester hydrochlorides (AMEH) was synthesized to improve the crystallization of poly(L-lactic acid) (PLLA) and PLLA/AMEH was prepared by melt blending and hot-press forming process. The thermal behaviour of PLLA/AMEH was investigated by DSC. Non-isothermal crystallization showed that alanine methyl ester hydrochloride made the melt crystallization peak become much sharper in the cooling process and the crystallization enthalpy increases from 1.379 to 9.941 J g-1 with the addition of 2 % alanine methyl ester hydrochloride at a cooling rate of 1 ºC/min from melt. The melting behaviour of PLLA/2 % AMEH after at different crystallization temperature for 1 h confirmed that double-melting peak of PLLA/2 % AMEH resulted from melting-recrystallization, However, the high-temperature melting peak becomes smaller with increasing of crystallization temperature.
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- Y.H. Cai, S.F. Yan, J.B. Yin, Y.Q. Fan and X.S. Chen, J. Appl. Polym. Sci., 121, 1408 (2011).
- P.J. Pan, Z.C. Liang, A. Cao and Y. Inoue, ACS Appl. Mater. Interf., 1, 402 (2009).
- X. Song, C. Min and L. Sun, Huaxue Shiji, 29, 687 (2007).
References
Y.H. Cai, S.F. Yan, J.B. Yin, Y.Q. Fan and X.S. Chen, J. Appl. Polym. Sci., 121, 1408 (2011).
P.J. Pan, Z.C. Liang, A. Cao and Y. Inoue, ACS Appl. Mater. Interf., 1, 402 (2009).
X. Song, C. Min and L. Sun, Huaxue Shiji, 29, 687 (2007).