barriersmaterials
Barrier materials are substances engineered to limit the transmission of unwanted species or energy between adjacent regions. They control the diffusion of gases, moisture, chemicals, or radiation and are used in packaging, electronics, construction, and environmental protection. Their performance is described by permeability, durability, and compatibility with surrounding materials and conditions.
Common barrier materials include polymer films such as ethylene vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), polyamides,
Applications span food and pharmaceutical packaging, where barriers limit oxidation and moisture; electronics encapsulation and optoelectronics
Design and testing focus on permeability metrics such as oxygen transmission rate (OTR) and water vapor transmission