Epoxy storage modulus

Does the storage modulus of epoxy resin change from cryogenic to elevated temperatures?

In this paper, a new model was developed to describe the progressive changes in the storage modulus of epoxy resin for multi-transition regions from cryogenics to elevated temperatures. The theoretical results were compared with corresponding experimental results.

Why is modulus important in epoxy?

modulus allows the epoxy to absorb stresses caused by temperature changes, even if the epoxy has a high CTE value. This is especially important for larger parts where the forces caused by thermal expansion are proportionately greater. In addition to strength and modulus, another important property is the hardness of an epoxy.

Why do epoxy resins have a high modulus and yield strength?

The high modulus and yield strength of these resins are closely related to their structural properties. As a typical amorphous polymer, epoxy resins have a cross-linked network structure that resembles a black box. There has been a lack of systematic theoretical guidance for the structural design of thermoset networks.

What is the temperature-dependent dynamic mechanical properties of epoxy resin?

Temperature-dependent dynamic mechanical properties of epoxy resin were studied by dynamic mechanical analysis. A new temperature-dependent storage modulus model was developed to describe the storage modulus of epoxy resin for multi-transition regions from cryogenics to elevated temperatures.

What is a temperature-dependent storage modulus model?

An improved temperature-dependent storage modulus model that can describe the properties of epoxy resin and its composites in the full temperature region was established. A new temperature-dependent loss modulus model and temperature-frequency-dependent storage and loss modulus models were also developed.

What are dynamic properties of epoxy resin?

Dynamic properties based on experimental data and model predictions for epoxy resin at different loading frequencies (1 and 100 Hz) and three loading modes. It should be pointed out that the temperature-dependent storage and loss modulus models can also be extended to describe multiple transitions.