Determination of the primary thermal-radiation characteristics of semitransparent filled polymer coatings

1975 ◽  
Vol 28 (5) ◽  
pp. 598-603
Author(s):  
L. S. Slobodkin ◽  
Yu. M. Sotnikov-Yuzhik
Keyword(s):  
Thermal Radiation ◽  
Polymer Coatings ◽  
Radiation Characteristics ◽  
Filled Polymer

Thermal Radiation in Packed and Fluidized Beds

1988 ◽  
Vol 110 (4b) ◽  
pp. 1230-1242 ◽  
Author(s):  
C. L. Tien
Keyword(s):  
Heat Transfer ◽  
Thermal Radiation ◽  
Fluidized Beds ◽  
Radiative Properties ◽  
Phase Boundaries ◽  
Radiation Characteristics ◽  
Theoretical Predictions ◽  
Systems Models ◽  
Reflectance Data

The present work gives an overview of the existing knowledge on radiative transfer in packed and fluidized beds. Special emphasis is given to the proper usage and determination of radiation characteristics of the particles in these systems. Models that treat the particulate bed as a continuum are discussed along with those that consider the system as discontinuous, i.e., accounting for the phase boundaries between the gas and the particles. Existing experimental techniques for determining the radiative properties are presented, and the published bed transmittance and reflectance data are discussed and compared with the theoretical predictions. Interaction of radiation with other modes of heat transfer is also examined.

Comparison of Optical Smoke Density of Expanded Polystyrene without and with Cover Components Used in ETICS

2013 ◽  
Vol 724-725 ◽  
pp. 1625-1629
Author(s):  
Peter Rantuch ◽  
Tomáš Chrebet ◽  
Karol Balog
Keyword(s):  
Thermal Radiation ◽  
Optical Density ◽  
Glass Fibre ◽  
Expanded Polystyrene ◽  
Composite Systems ◽  
Testing Method ◽  
Potential Source ◽  
Smoke Generation ◽  
Pilot Burner

This paper deals with expanded polystyrene (EPS) as a potential source of smoke. We compared specific optical density of smoke from EPS and EPS strengthened by glass fibre mash and plaster which is used in external thermal insulation composite systems (ETICS). There was used testing method by ISO 5659 Plastics Smoke generation Part 2: Determination of optical density by a single-chamber test. The samples were exposed to a constant 50 kW.m-2 of thermal radiation. There was not used a pilot burner. During flame combustion samples evolved high amount of smoke. Samples from EPS released more smoke like samples with ETICS cover.

Calculation and Experimental Technique for Determining the Damping Properties of Composite Materials

2018 ◽  
Vol 938 ◽  
pp. 46-53 ◽  
Author(s):  
Sergey I. Koryagin ◽  
O.V. Sharkov ◽  
Nikolay L. Velikanov
Keyword(s):  
Experimental Technique ◽  
Polymer Coatings ◽  
Engineering Systems ◽  
Damping Properties ◽  
Metal Structures ◽  
Experimental Specimen ◽  
Adhesive Compositions ◽  
Improved Accuracy ◽  
Damping Capability

Polymer coatings are widely used for effective vibration damping of sheet or hull structures of different engineering systems. The article presents a calculation and experimental technique that enables improved accuracy and validity of damping properties determination of polymer coatings. Mathematical models to determine the parameters of the experimental specimen having a homogenous strain state of the polymer coating are obtained. Experimentally confirmed that the use of coatings based on adhesive compositions such as "Sprut" increases by 18...28 times the damping capability in metal structures. An addition of fillers in adhesive compositions "Sprut" type in a proportion of 30...50% of its weight reduces by 2.4 times the damping properties of metal structures.

Bestimmung der Haftzugfestigkeit dichter Beschichtungen / Determination of bond strength of impermeable polymer coatings

1999 ◽  
Vol 5 (4) ◽  
pp. 387-398
Author(s):  
R.M. Frey ◽  
F.H. Wittmann
Keyword(s):  
Bond Strength ◽  
Polymer Coatings ◽  
Theoretical Background ◽  
Gas Pressure ◽  
Blister Formation ◽  
Controlled Conditions ◽  
Porous Substrates

Abstract In many cases there is a risk for the formation of blisters if impermeable polymer coatings are applied on porous substrates. On covers of courses in sport stadiums formation of blisters has been observed recently. In this contribution a method is described which can be used to investigate the causes of blister formation in a given system. Blisters are artificially created by the application of a gas pressure in the interface between coating and substrate. In this way the growth of blisters can be varied under controlled conditions. The theoretical background of this method is outlined. In this way it is possible to estimate the necessary pressure under the cover to create blisters of the observed size.

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