Natural rubber (NR) was melt blended with polylactic acid (PLA) at various ratios using an internal mixer. The impact strength and elongation at break of PLA/NR blend dramatically increased with increasing NR content up to 10% (w/w). Glycidyl methacrylate‐grafted natural rubber (NR‐g‐GMA) was used as a compatibilizer for PLA/NR blend. The effects of content and %grafting of NR‐g‐GMA on mechanical properties of PLA/NR blend were studied. The experimental result showed that the addition of NR‐g‐GMA in PLA/NR blend significantly improved impact strength and elongation at break of PLA/NR blend when compared with that of neat PLA and PLA/NR blend without NR‐g‐GMA. The impact strength and elongation at break of PLA/NR blend increased with increasing NR‐g‐GMA content up to 1% (w/w). Moreover, with increasing % grafting of NR‐g‐GMA in PLA/NR blend up to 4.35, the impact strength and elongation at break of the blend increased. Morphological and thermal property of PLA, PLA/NR, and PLA/NR/NR‐g‐GMA were elucidated as well.
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Juntuek et al. (2011) studied this question.
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