suggesting that PLA reacted with NR during melt-blending in the presence of DCP.
The extent of the compatibilization reaction can be approximately described by the amount of grafted PLA per
unit of residual NR, as measured by the ratio of absorption peak area at 1758 cm-1 to that at 1375 cm-1 (C-H symmetric deformation of NR's -CH3), i.e., A1758/A1375.
As shown in Table 1, the A1758/A1375 values show an increase for the dynamically vulcanized blends with increased NR content, indicating the effective interfacial compatibilization achieved by PLA grafting onto NR during dynamic vulcanization