It should be noted that in the first heating scan,the Tg of PLA/ENR blends is located at the same temperature around 63 C, indicating that the addition of epoxidized natural
rubber did not have obvious effect on the glass transition behavior of PLA. The DSC study of PLA and natural rubber blends by Jaratrotkamjorn et al.also observed similar thermal behavior of theblends and little change in Tg. The value of Tg in their report was
about 58 ± 2 C, which is approximately 5 C lower than ours.