Construction of Multi‐Level Crosslinking Network in Boric Acid Modified Poly(Vinyl Alcohol) System and Its Effect on Structure and Properties of the Biaxially Stretched Films
Poly(vinyl alcohol) (PVA) is a commercial polymer with one of the lowest oxygen transmission rates, demonstrating considerable application potential in high‐barrier packaging. However, its poor thermal processability severely limits its practical use. Based on molecular complexation technology for thermal processin...