Barrier Properties of Polymeric Blend Films
Summary
Polymeric blend films combine two or more polymers to achieve synergistic barrier performance against gases, vapours and solvents while maintaining requisite mechanical strength and flexibility. The barrier efficiency of such films is governed by blend composition, phase morphology, interfacial adhesion and the presence of fillers or compatibilisers. Control of polymer miscibility and phase separation provides pathways to tailor tortuous diffusion paths, thereby reducing permeant transmission. Nanocomposite approaches, involving layered silicates or functionalised nanoparticles, further restrict gas permeation by creating complex diffusion networks. Key metrics such as oxygen transmission rate (OTR) and water vapour transmission rate (WVTR) underpin comparative assessments. Recent emphasis on sustainable materials has propelled research into recyclable mono-material multilayers and bio-based copolymer blends. These advances hold global significance for food preservation, flexible electronics encapsulation and sustainable packaging, aligning barrier performance with circular-economy principles.
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Barrier Properties of Polymeric Blend Films publication trend
The graph below shows the total number of articles in barrier properties of polymeric blend films across all publications each year (not limited to Nature Index journals).
Technical terms
Polymeric blend film: A thin material composed of two or more polymers combined to achieve tailored mechanical and barrier properties.
Miscibility: The ability of two polymers to mix at the molecular level, affecting phase separation and film homogeneity.
Intercalation: Insertion of polymer chains into the galleries of layered nanoclay, leading to ordered but expanded structures.
Exfoliation: Complete separation of clay layers within a polymer matrix, yielding maximised interfacial area and enhanced barrier performance.
Oxygen transmission rate (OTR): A metric quantifying the flow of oxygen per unit area and time through a film under specified conditions.
Barrier properties: The capacity of a film to resist permeation by gases, vapours or liquids, critical for packaging and protective applications.
References
- A Powerful Strategy for Carbon Reduction: Recyclable Mono-Material Polyethylene Functional Film. Polymers (2024).
- Polypropylene/Ethylene—And Polar—Monomer-Based Copolymers/Montmorillonite Nanocomposites: Morphology, Mechanical Properties, and Oxygen Permeability. Polymers (2021).
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