Master curve of storage modulus

What is a master curve of a shear modulus?

Master curve of the shear modulus at a reference temperature of –10 °C. Master curve of the shear compliance at a reference temperature of −10 °C. From the measurement curves in Section 3.4.2, all the storage and loss moduli are displayed as a function of frequency at every temperature.

How does temperature affect a loss modulus compared to a storage modulus?

The curves measured at temperatures lower than the reference temperature are shifted to higher frequencies in such a way that the individual curves of the storage modulus and the loss modulus overlap to the greatest possible extent with the corresponding composite curves so formed.

What is storage modulus?

1.Storage Modulus (E’ or G’): This represents the material’s elastic behavior. It quantifies how much energy the material can store and release during each cycle of deformation. Mathematically, it is defined as the ratio of stress (σ) to strain (ε) amplitude multiplied by the cosine of the phase angle (δ):

What is storage modulus & loss modulus?

The storage modulus is frequency-dependent and typically increases with increasing frequency. 2. Loss Modulus (E’’ or G’’): This characterizes the material’s viscous behavior. It accounts for energy dissipation (loss) during each deformation cycle.

What is the storage modulus (E) of three different polymers?

Storage Modulus (E’) of Three Different Polymers For example, Figure 7 compares the storage modulus (E’) curves for three different polymers that were obtained using a heating ramp rate of 3°C /minute and an oscillation frequency of 1 Hz. The relatively flat regions at the lower temperatures correspond to the glassy (rigid) state of each polymer.

What is a master curve?

A reference temperature of To=25 C was selected and the modulus-versus-time curves for the remaining isotherms were horizontally shifted towards this reference until an exact superposition is accomplished. Shifting of each isothermal curve results in a much larger, smooth continuous curve known as a master curve.