Mechanical and water barrier properties of starch/PVA composite films by adding nano-sized poly(methyl methacrylate-co-acrylamide) particles

► We prepare starch/PVA composite films added PMMA-co-AAm nanoparticles. ► We examine the physical properties and biodegradation for films added PMMA-co-AAm. ► We evaluate the effect of contents, particle sizes, and MMA and AAm ratio. ► Adding PMMA-co-AAm nanoparticles on films improve the physical properties.