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Abstract
Biodegradable polymer blends of poly(L-lactic acid) (PLLA) and poly(ϵ-caprolactone) (PCL) with the addition of 2 phr lysine triisocyanate (LTI) were investigated using the Fourier transform infrared (FT-IR) spectroscopy, field-emission electron scanning microscope (FE-SEM), and mode I fracture testing technique. It was found that the addition of LTI dramatically improved the phase-separation morphology of the PLLA/PCL blends, hence increase the mode I fracture properties. The FT-IR analysis suggested that LTI acted as a compatibilizer by inducing secondary interaction between the NCO groups of LTI with the OH groups of PLLA and PCL.
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ACKNOWLEDGMENTS
The authors would like to thank Toyota Motor Co., Ltd., Chemistry Industry Ltd., and Kyowa Co., Ltd. for supplying the materials used in this study. This work was funded by ASEAN University Network Southeast Asia Engineering Education Development Network (AUN/SEED-Net) and Japan International Cooperation Agency (JICA) (Grant No. 6050131). The authors also greatly acknowledge the support of the Universiti Sains Malaysia and Kyushu University.