Unique crystallization behavior of multi-walled carbon nanotube filled poly(lactic acid) |
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| Authors: | Seong Yun Kim Kook Seung Shin Seung Hwan Lee Kyeong Wung Kim Jae Ryoun Youn |
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| Institution: | 1.Research Institute of Advanced Materials, Department of Materials Science and Engineering,Seoul National University,Seoul,Korea;2.Dongwoo Finechem Co. Ltd.,Gyeonggi-Do,Korea;3.Cresin Co. Ltd.,Gyungsangbuk-Do,Korea |
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| Abstract: | Although poly(lactic acid) (PLA) possesses many desirable properties such as miscible, reproducible, nontoxic, and biodegradable
properties, extremely slow crystallization rate is a weak point in comparison with other commercial thermoplastics. Addition
of nucleating agents can be a good method to increase the overall crystallization rate and multi-walled carbon nanotube (MWCNT)
is generally known as a good nucleating agent as well as reinforcement. MWCNT reinforced PLA nanocomposites were prepared
by melt blending and the unique nucleation and crystallization behaviors of pure PLA and MWCNT/PLA nanocomposites were investigated.
Slow homogeneous nucleation and crystallization behavior of the pure PLA and fast heterogeneous crystallization behavior of
MWCNT/PLA nanocomposites were observed. Crystallization behavior of MWCNT/PLA nanocomposites was irrespective of cooling rate
and the peculiar behavior was due to fast heterogeneous crystallization caused by the nucleating effect of MWCNT and fast
PLA chain mobility. |
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