Effect of biobased and biodegradable nucleating agent on the isothermal crystallization of poly(lactic acid) |
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| Authors: | Kyung Su Kang Sang Il Lee Tae Jin Lee Ramani Narayan Boo Young Shin |
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| Affiliation: | (1) School of Chemical Engineering and Technology, Yeungnam University, 214-1 Dae-dong, Gyeoungsan, 712-749, Korea;(2) Channel DM Co., Ltd., 12F, Gateway Tower, Dongja-dong, Yongsan-gu, Seoul, 140-709, Korea;(3) Department of Chemical Engineering & Material Science, Michigan State University, East Lansing, MI 48823, USA |
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| Abstract: | The effect of chemically modified thermoplastic starch (CMPS) on the thermal properties and isothermal crystallization kinetics
of poly(lactic acid) (PLA) was studied by differential scanning calorimetry (DSC) and compared to that of granular starch
and an inorganic nucleating agent, talc. Nucleated PLA showed an additional crystallization of PLA, which affected the melting
temperature. The crystallinity and crystallization rate of PLA were considerably enhanced by addition of CMPS, even at 0.1%
content, and the amount of the CMPS had little effect on the thermal properties and isothermal crystallization kinetics of
PLA. The effect of CMPS as a nucleating agent was comparable to that of granular starch but slightly less than that of talc.
However, CMPS can offer a fully biodegradable nucleating agent with no residues remaining for the biobased and biodegradable
polymers. |
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| Keywords: | Poly(lactic acid) Nucleating Agent Isothermal Crystallization Chemically Modified Thermoplastic Starch |
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