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外文期刊>Journal of Applied Polymer Science
>Effects of polylactide‐functionalized multi‐walled carbon nanotubes on the crystallization behavior and thermal stability of poly (L‐lactic acid)
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Effects of polylactide‐functionalized multi‐walled carbon nanotubes on the crystallization behavior and thermal stability of poly (L‐lactic acid)
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机译：Effects of polylactide‐functionalized multi‐walled carbon nanotubes on the crystallization behavior and thermal stability of poly (L‐lactic acid)
Abstract In this work, poly (L‐lactic acid) (PLLA) grafted multi‐walled carbon nanotubes (MWCNTs‐g‐PLLA) was prepared by ring‐opening polymerization of L‐lactide (L‐LA) from hydroxylated MWCNTs (MWCNTs‐OH). The grafted product was characterized by Fourier transform infrared spectrometer and X‐ray diffraction. It is found that MWCNTs‐g‐PLLA exhibits a carbonyl (C═O) stretching vibration peak in PLLA at near 1758 cm−1; the crystal diffraction peaks of MWCNTs‐g‐PLLA at 25.9°, 16.7°, 19.1°, and 21° are same as the peak positions of MWCNTs‐OH and PLLA, indicating that the grafted product is synthesized successfully. Then, MWCNTs‐OH/PLLA48k and MWCNTs‐g‐PLLA/PLLA48k composites were obtained by solution blending with different contents. The effects of MWCNTs‐OH and MWCNTs‐g‐PLLA on the crystallization behavior and thermal stability of PLLA48k homopolymer were investigated by differential scanning calorimetry (DSC), polarized light microscopy and thermogravimetric analysis. The results show that the crystallinity and the maximum crystallization rate of the blends increases, and the decomposition temperature of the blends increases by above 50°C.
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