Question

11. The thermal conductivity of plastic foam is​

Answer 1

Answer:

Thermal conductivity of plastics is generally measured by ASTM C177 and ISO 8302, using guarded hot-plate apparatus. The steady state temperatures, the thickness of the sample and the heat input to the hot plate are used to calculate thermal conductivity.

Answer 2

Answer:

The thermal conductivity of plastic foam is​ 0.03.

Explanation:

Without the need for changeable parameters, a straightforward equation for predicting the thermal conductivity of plastic foams is proposed. The equation is based on a recurring technique that was previously devised and demonstrated fair agreement with experimental findings. There are methods for reducing the contribution of heat radiation. The impact of cell size, radiation transmission via solid membranes, and low-emissivity boundary surfaces are specifically examined. It is discussed how steady approaches can have errors when measuring the thermal conductivity of radiation.