Abstract
Radiation energy is not subject to the reflection or penetrating energies but to the thermal and the excited energies.
In the previous paper, the radiation behaviour of the kinds of polymer films was studied. In this report, further investigation on the radiation is made with the following samples: polypropylene, polycarbonate, polyvinyl chloride, nylon 6, saran, polyethylene terephthalate and diacetate films. Absorptive power obtained were compared with the penetration energy and total energy for all samples. Radiation coefficients shown in Fig. 17 were obtained from the ratio of absorptive energy of the specimen to that of black body at 300°K. These results obtained on all samples in this study are similar to those in the preceding paper (III).
