Dynamic flow tests, adsorption-desorption

It is important to underline here that the schematic description of rubber-CB systems given in Figure 5.16 has to be considered as an "instant" view of materials, which remain essentially (pseudo) fluids above their glass temperature, i.e., practically in their whole processing and application temperature windows. We mean that rubber-CB interactions are likely to be dynamic, through continuous adsorption-desorption processes, at equilibrium at any given temperature. BdR content is therefore nothing else than the assessment of an equilibrium state at the temperature of the test, and therefore, is expected to decrease as extraction temperature increases (as readily observed indeed). If it were not the case, such complex materials would not have the capability to flow. 

Abstract Adsorption and desorption of indoor air pollutants to and from indoor surfaces are important phenomena. Often called sink effects, these processes can have a major impact on the concentration of pollutants in indoor environments and on the exposure of human occupants to indoor air pollutants, Basic theories are used to describe the processes using fundamental equations. These equations lead to models describing sink effects in indoor environments. Experimental studies have been performed to determine the important parameters of the sink models. Studies conducted in dynamic, flow-through environmental test chambers have quantified adsorption and desorption rates for many combinations of indoor air pollutants and interior surfaces. Sink effects have been incorporated into indoor air quality (lAQ) models to predict how adsorption and desorption processes affect... 

Studies conducted in dynamic, flow-through environmental test chambers have quantified adsorption and desorption rates for only a small number of the available combinations of indoor air pollutants and interior surfaces. 

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