UV-cured organic–inorganic hybrid moisture barrier materials based on polybutadiene dimethacrylate

In this study, a synthesized polymerizable quaternary ammonium salt (PQAS-18) was intercalated into inorganic sodium montmorillonite (Na-MMT) as an organic modifier via cationic exchange. Afterward, a novel organic–inorganic hybrid material was prepared through in situ UV-curing technology and combined with a polymer matrix based on polybutadiene dimethacrylate (PBDMA). PQAS-18 fixed the crosslinked network due to its double bond, thereby leading to firm bonding between the polymer matrix and organoclay; moreover, our study showed homogeneous dispersion of the lamellar structure in the polymer matrix. X-ray diffraction proved that the distance between Na-MMT layers increased, and water vapor transmission measurement showed that the moisture barrier property of cured hybrid film was remarkably improved.