期刊
ACS MACRO LETTERS
卷 1, 期 6, 页码 709-713出版社
AMER CHEMICAL SOC
DOI: 10.1021/mz300131u
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资金
- National University of Singapore [R-284-000-084-133]
Poly(lactide) (PLA)-graphene oxide (GO) nanocomposites were prepared by blending commercial poly(L-lactide) (PLLA) with GO-g-PDLA, where GO-g-PDLA was synthesized via ring-opening polymerization using modified GO as the initiator. Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), and X-ray diffraction (XRD) studies showed that a stereocomplex crystal could be formed between PLLA and GO-g-PDLA. The incorporation of GO nanofillers leads to a lower crystallization activation energy of stereocomplex and a higher crystallinity in solution casting samples, mainly due to the heterogeneous nucleating effect of the well-dispersed covalently bonded GO sheets, while in cold crystallized samples, the crystallinity was low owing to exfoliated GO sheets which may reduce chain mobility and hinder crystal growth.
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