Poly(lactic acid) (PLA)-based composites were prepared by blending PLA with precipitated barium sulfate (BaSO 4 ) modified with stearic acid. The morphologies, mechanical properties and thermal stability of samples with increased mass fraction of BaSO 4 were investigated. Results showed that PLA was toughened and reinforced simultaneously by incorporation of precipitated BaSO 4 particles. The highest impact toughness and elongation at break were both achieved at 15% BaSO 4 , while the elastic modulus increased monotonically with increasing BaSO 4 loading. Little effect of BaSO 4 on the thermal behavior of PLA was observed in the present case. However, the thermal stability of PLA/BaSO 4 composites at high temperature was enhanced.
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Yang et al. (2015) studied this question.
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