The Thermal Conductivity of Unfilled Plastics

By sales@ctherm.com

All values in the table are defined at room temperature.

Thermal conductivity of some plasticsOnline  —  As a rule-of-thumb, the thermal conductivity increases with a few percent in the range 0-100 °C.

Only below very low temperatures (typically 40 K), plastics show a clear decrease.

Fillers such as silver, copper, CNTs etc. typically cause a sharp increase in the thermal conductivity of a polymer composite. Continue reading

Transient Line Source (TLS) Application Highlight:  Measuring Thermal Conductivity of a Polymer Melt

By sales@ctherm.com

Figure1 Plastic Injection Molding

Figure1 Plastic Injection Molding

Online  —  The thermal conductivity of molten plastics is an important material property from the point of view of plastics processing since it affects temperature distribution and cooling behavior of the melt.

Accurate thermal conductivity characterization of the polymer feedstock supports increased productivity and better quality of finished product.

It is vital for reliable process simulation of extrusion and injection moulding processes. Continue reading

Using Thermal Effusivity to Investigate the Thermal Performance of PCMs and PCM Composites

By sales@ctherm.com

 

Figure 1. Thermal inertia (effusivity) of gypsum board with an embedded paraffin-based PCM. (Source:  http://dx.doi.org/10.1080/01694243.2016.1215011 )

Online  —  Phase change materials (PCMs) are substances with a high latent heat (typically of fusion) which may be used to store a large degree of heat energy by melting and crystallizing at a certain temperature.

PCMs can be organic, inorganic, eutectics, and hydroscopics (where the phase change is not a change of fusion but rather of absorption and desorption of water vapor). Continue reading