CROSSLINKED Meaning and
Definition
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Crosslinked, in materials science, refers to the process of chemically bonding polymer chains together, creating a three-dimensional network structure. This is achieved by introducing crosslinking agents or through irradiation, heat, or other methods to form covalent bonds between adjacent polymer chains.
When a polymer is crosslinked, its physical properties are significantly altered compared to its uncrosslinked form. The network structure enhances the material's mechanical strength, hardness, and dimensional stability. It also increases resistance to heat, chemicals, and environmental factors, making crosslinked materials durable and long-lasting.
The crosslinking process creates a rigid, interconnected network that restricts the mobility of polymer chains, resulting in increased tensile strength and toughness. This property is especially desirable in applications where high mechanical strength or impact resistance is required, such as in composites, adhesives, coatings, elastomers, and thermosetting plastics.
Crosslinked materials exhibit improved resistance to swelling, solvents, and degradation. The three-dimensional structure prevents the penetration of solvents or chemicals, making crosslinked polymers resistant to chemical attack, moisture, and UV radiation. This enhanced resistance extends the lifespan and functionality of crosslinked materials, making them suitable for various industries, including automotive, aerospace, construction, and medical.
Overall, the process of crosslinking transforms polymers into stronger and more chemically stable materials with enhanced mechanical properties, providing excellent performance in a wide range of applications.
Etymology of CROSSLINKED
The term "crosslinked" is derived from the combination of the words "cross" and "linked".
The word "cross" originates from the Old English word "cros", which was borrowed from the Old Irish word "cros" and further derived from the Latin word "crux". The root meaning of "cross" refers to the geometrical shape of two lines or bars intersecting at a 90-degree angle, forming a cross.
The word "linked" is derived from the Old English word "hlencan", meaning "to unite" or "to join together". It is related to the Middle Dutch word "lincken" and the Old High German word "hlenken".
When combined, "crosslinked" refers to a process or state in which two or more chains, molecules, or polymers are chemically bonded or connected at various points across their structures, creating a network-like structure.
