Properties of Poly(lactic acid) Toughened by Epoxy-functionalized Elastomer

doi:10.3969/j.issn.0251-0790.2012.02.033

Abstract

Abstract: Poly(lactic acid)(PLA) was toughened by reactive blending with epoxy-functionalized elastomer glycidyl methacrylate grafted poly (ethylene octane)(POE-g-GMA) and ethylene-methyl acrylate-glycidyl methacrylate random terpolymer(E-MA-GMA). The result shows that POE-g-GMA is more effective than E-MA-GMA to toughen PLA. When the mass fraction of POE-g-GMA is 15%(mass fraction), the notched impact strength of the PLA/POE-g-GMA blend is as high as 72.5 kJ/m², while the impact strength of PLA/E-MA-GMA blend is only 32.4 kJ/m² when the E-MA-GMA is 15%(mass fraction). The scanning electron microscopy displayed better interfacial adhesion for PLA/POE-g-GMA blends than PLA/E-MA-GMA, which was well consistent with their results of mechanical properties.

Key words: Poly(lactic acid), Toughening, Reactive blending, Elastomer, Glycidyl methacrylate grafted poly(ethylene octane), Ethylene-methyl acrylate glycidyl methacrylate random terpolymer

CLC Number:

O631

TrendMD:

FENG Yu-Lin, YIN Jing-Hua, JIANG Wei, ZHAO Gui-Yan. Properties of Poly(lactic acid) Toughened by Epoxy-functionalized Elastomer[J]. Chem. J. Chinese Universities, 2012, 33(02): 400.

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