Thickness Of Plastic Layer Research Articles

Synergetic effects during carbonisation of Polish orthocoking coals

The carbonisation of three coals type 35.1 in blends with coal type 35.2 has been studied in a laboratory unit using X-rays. It was found that, during carbonization of coal type 35.1, synergetic effects were observed under the action of coal type 35.2 producing an increase in the intralayer pressure, a change in the plastic layer thickness and a displacement of the non-volatile mass compared to the expected values. As a consequence of the synergetic effect, a solid residue (coke) was obtained, which had a different volume than that calculated by the additivity rule.

Buckling in elastomer/plastic/elastomer 3‐layer films

AbstractBuckling during recovery of stretched elastomer/plastic/elastomer 3‐layer films was studied using a block copolymer elastomer and polyolefin plastics. An elastic model was developed to describe the critical wavelength, critical compressive strain, and critical compressive stress for buckling without delamination. The predicted linear dependence of critical wavelength on the plastic layer thickness was confirmed, and the modulus ratio between the plastic and the elastomeric layers was extracted. Determination of the critical compressive strain provided an independent calculation of the modulus ratio. Similar modulus ratios were obtained by the two methods. The critical compressive stress in the plastic layer led to reasonable values for the compressive modulus of the stretched plastic layer and the bulk modulus of the elastomeric layers. To test the model further, the modulus ratio was altered by changing the stretch ratio and by varying the plastic layer material. No buckling occurred if the modulus ratio was too small. Polym. Compos. 25:653–661, 2004. © 2004 Society of Plastics Engineers.

Modeling and recording characteristics of a dye-doped polymer bilayer film

The optical, thermal, and structural behavior of a laser-irradiated dye-in-polymer bilayer film consisting of an elastic and a plastic layer was investigated by a computer modeling and recording experiment. The results of numerical calculations describe absorption of optical energy in the recording layers, the heat flow, and the resultant bump formation throughout the multilayer. Recording performance of the material is strongly affected by the dye concentration and the thickness of the plastic layer. The calculated and measured properties of the media are compared, and the relationship between the dye concentration, thickness of plastic layer, and thermal, structural, and recording performance are described.