Mechanical properties Polymer

a polyethylene sample has necked under tension.

the bulk properties of polymer of end-use interest. these properties dictate how polymer behaves on macroscopic scale.

tensile strength

the tensile strength of material quantifies how elongating stress material endure before failure. important in applications rely upon polymer s physical strength or durability. example, rubber band higher tensile strength hold greater weight before snapping. in general, tensile strength increases polymer chain length , crosslinking of polymer chains.

young s modulus of elasticity

young s modulus quantifies elasticity of polymer. defined, small strains, ratio of rate of change of stress strain. tensile strength, highly relevant in polymer applications involving physical properties of polymers, such rubber bands. modulus dependent on temperature. viscoelasticity describes complex time-dependent elastic response, exhibit hysteresis in stress-strain curve when load removed. dynamic mechanical analysis or dma measures complex modulus oscillating load , measuring resulting strain function of time.