Functionalization and Mechanical Properties of Polymer Blends
Summary
Polymer blends combine two or more distinct polymers to achieve synergistic properties not attainable by individual components. Functionalization—most commonly by grafting reactive monomers such as maleic anhydride, glycidyl methacrylate or itaconic anhydride onto one of the polymer phases—enhances interfacial adhesion and compatibility. Improved phase interaction leads to refined morphology, tailoring crystallinity and phase dispersion, which in turn govern mechanical performance parameters such as tensile strength, toughness and impact resistance. Recent advances focus on optimising grafting efficiency and controlling the degree of functionalisation via reactive extrusion, supercritical fluids or free-radical chemistry. These strategies enable in situ compatibilisation and the design of multi-functional blends with hierarchical interfaces. By adjusting the chemical architecture of graft copolymers and tuning processing conditions, researchers achieve blends that combine high stiffness with exceptional ductility, rapid biodegradation or enhanced barrier performance. This body of work underpins applications ranging from lightweight automotive components and flexible packaging to biomedical devices and sustainable biocomposites, reflecting the global importance of tailoring polymer blend properties through targeted functionalisation and precise control of microstructure.
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Functionalization and Mechanical Properties of Polymer Blends publication trend
The graph below shows the total number of articles in functionalization and mechanical properties of polymer blends across all publications each year (not limited to Nature Index journals).
Technical terms
Compatibiliser: A functionalised polymer added to blends to improve interfacial adhesion between immiscible phases.
Graft copolymerisation: A reaction in which side chains of one polymer are chemically bonded onto a different polymer backbone.
Crystallinity: The degree of ordered molecular packing in a polymer that affects stiffness, thermal resistance and barrier properties.
Interfacial adhesion: The strength of bonding at the interface between two polymer phases, crucial for load transfer and toughness.
Reactive extrusion: A processing technique that combines chemical reaction and melt blending in a single extrusion step to functionalise polymers in situ.
References
- The Effect of Functionalized SEBS on the Properties of PP/SEBS Blends. Polymers (2023).
- Reactive Extrusion Grafting of Glycidyl Methacrylate onto Low-Density and Recycled Polyethylene Using Supercritical Carbon Dioxide. Applied Sciences (2022).
- Super Tough PA6/PP/ABS/SEBS Blends Compatibilized by a Combination of Multi-Phase Compatibilizers. Materials (2024).
- Innovative Poly(lactic Acid) Blends: Exploring the Impact of the Diverse Chemical Architectures from Itaconic Acid. Polymers (2024).
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