Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 137, Issue 34, Pages -Publisher
WILEY
DOI: 10.1002/app.48996
Keywords
epoxidized natural rubber; miscibility; polymer blend poly(lactic acid); reactive blending
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Funding
- Prince of Songkla University [SCI600382S]
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The objective of this work was to determine the effect of the epoxide content in epoxidized natural rubber (ENR) on the miscibility and compatibility with poly(lactic acid) (PLA) in prepared PLA/ENR blends. PLA was blended with 10 wt% of ENRs (epoxidized at 10, 15, 20, and 25 mol%). The presented study showed that the in situ graft copolymer, PLA-g-ENR, was formed during melt blending in the blends containing 10 and 15 mol% ENR. This work is the initial study showing the presence of PLA-g-ENR in the blends by H-1-NMR and C-13-NMR. PLA-g-ENR acted as a compatibilizer, producing a partially miscible blend, indicated by an inward shift of the alpha-transition temperatures of PLA and ENR in the blends. PLA-g-ENR also greatly reduced the particle size of ENR and increased the impact strength, tensile strength, and elongation at break of the blends. The epoxide content of ENR changed deformation mechanisms of the blends.
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