Journal
EUROPEAN POLYMER JOURNAL
Volume 49, Issue 8, Pages 2356-2364Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2013.05.027
Keywords
Poly(lactic acid); Polyethylene glycol; Acrylate; Reactive blending; Grafting
Categories
Funding
- Ministry of Science, ICT & Future Planning, Korea [2013003956, 2013008174/2013008201]
- National Research Foundation of Korea [2010-0019482, 2009-0078791] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Poly(lactic acid) (PIA) was grafted by low molecular weight acrylated-poly(ethylene glycol) (PEG) via a reactive blending to improve its plasticity. The acrylated-PEG grafted onto PLA was confirmed by the result of nuclear magnetic resonance (NMR) spectra, Fourier transform infrared (FTIR) spectra, wide-angle X-ray diffraction (WAXD) patterns as well as solvent extraction. The properties of the grafted PLAs (PLEAS) were investigated through tensile testing (UTM), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and hydrolytic degradable analysis. The glass transition temperature (T-g) of the PLEAs significantly decreased by more than 20 degrees C and the glass transition exhibits at a broad temperature range between 15 and 56 degrees C. The Young's modulus of PLA was lowered by 66% from 1.2 GPa to 0.4 GPa, while the elongation at break of PIA was increased by 380% from 4.7% to 17.9%. (c) 2013 Elsevier Ltd. All rights reserved.
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