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Mechanical properties are physical properties that a material exhibits upon the application of forces. Examples of mechanical properties are the modulus of elasticity, tensile strength, elongation, hardness and fatigue limit.
A polymer code based on a triplet of parameters—network strand length, side-chain length and grafting density—enables materials to be designed with specific combinations of mechanical properties to mimic biological materials.
Gluing materials together underwater is a mighty challenge faced — and overcome — by mussels. It requires good adhesion and cohesion. Molecular-level mechanical measurements have now shown that cation–π interactions provide surprisingly strong cohesive abilities.