“…Incorporating CA into cast polyester films (C-75:25:15-CA) significantly reduced the EM and enhanced stretchability due to the random distribution of the CA molecules between the polymer chains, which increases their free volume, provoking a plasticizing effect and reducing the matrix strength. The plasticizing effect of CA in different polymer matrices has also been reported in neat PHBV films (Requena, Jim enez, Vargas, & Chiralt, 2016a), polypropylene (Ramos, Jim enez, Peltzer, & Garrig os, 2012), alginateeapple puree (Rojas-Graü et al, 2007) or Gelidium Corneum films (Lim, Hong, & Song, 2010). As Jost and Kopitzky (2015) reported, pure PLA films showed significantly higher WVP values than PHBV films ( Table 1).…”