Relationship between Fracture Mechanism and Microstructure in PLA/PCL Polymer Blends


Article Preview

PLA/PCL and PLA/PCL/LTI blends were developed to improve the fracture properties of biodegradable PLA. LTI was blended to improve the miscibility of PLA and PCL. It was shown that the fracture toughness values were dramatically increased due to LTI addition. SEM results also exhibited that PCL spherulites decreases due to LTI addition and therefore, void formation is reduced and local stress concentration is suppressed, resulting in the improvement of the toughness values. The improved miscibility is also closely related to the enhancement of ductile deformation; as a result, the fracture toughness is increased.



Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie




T. Takayama et al., "Relationship between Fracture Mechanism and Microstructure in PLA/PCL Polymer Blends", Key Engineering Materials, Vols. 353-358, pp. 1169-1172, 2007

Online since:

September 2007




[1] K. mohanty, M. Misra and G. Hinrichsen, Macro. Mater. Eng. Vol. 1 (2000), p.267.

[2] S. Higashi, T. Tamamoto, T. Nakamura, Y. Ikeda and K. Jamshidi, Biomate. Vol. 7 (1986), p.183.

[3] M. Todo, N. Shinohara and K. Arakawa, J. Mater. Sci. Lett. Vol. 21 (2002), p.1203.

[4] M. Todo, N. Shinohara, K. Arakawa and H. Tsuji, Kobunshi Ronbunshu Vol. 60 (2003), p.644.

[5] S. -D. Park, M. Todo and K. Arakawa, J. Mater. Sci. Vol. 39 (2004), p.1113.

[6] S. D. Park, M. Todo and K. Arakawa, Key Eng. Mater., Vol. 261/263 (2004), p.105.

[7] S. -D. Park, M. Todo and K. Arakawa, J. Mater. Sci. Vol. 40 (2005), p.1055.

[8] H. Tsuji and Y. Ikada. J. Appl. Polym. Sci. Vol. 60 (1996), p.2367.

[9] S. Kawahara, M. Todo, K. Arakawa, H. Tsuji, K. Takenoshita. Proc. on M&M2003 in Toyama, (2003), p.663.

[10] L. Wang, W. Ma, R. A. Gross and S. P. Mccarthy, Polym. Deg. Stab. Vol. 59 (1998), p.161.

[11] M. Hiljanen, P. Varpomaa, J. Sppala and P. Tormala, Macromol. Chem. Phys. Vol. 197 (1996), p.1503.

[12] J. C. Meredith and E. J. Amis, Macromol. Chem. Phys. Vol. 201 (2000), p.733.

[13] H. Tsuji, T. Yamada, M. Suzuki and S. Itsuno, Polym. Int., Vol. 52 (2003), p.269.

[14] R. Dell' Erba, G. Groeninckx, G. maglio, M. Malinconico and A. Migliozzi, Polymer, Vol. 42 (2001), p.7831.

[15] M. Harada, H. Hayashi, K. Iida, M. Oda, S. Akita, K hirano and H. fukuda, Poly. Vol. 52 (2003) 965.

[16] T. Takayama, M. Todo, K. Arakawa and H. Tsuji, Trans. Jpn. Soc. Mech. Eng. Vol. 72(2006) 714.