Exact(2)
Due to these effects, a diffusion of contamination molecules or particles is favored, if the reaction is performed under normal atmosphere.
This can be realized by different approaches, even if the diffusion does not have a high relevance for high viscosities (correlating with room temperature for the focused prepreg systems), it should be considered that there is always a small diffusion of contamination particles, once the prepreg is in contact with the mold surface respectively the contamination layer.
Similar(58)
Besides the highly relevant diffusion of contaminations, one reason of the bad bondability of untreated demolded CFRP-parts is their nonpolar surface state.
While for example higher temperatures decrease the viscosity of the resin, which favor the diffusion of contaminations, the polymerization is also accelerated by higher temperatures.
Based on the literature (cf. [19, 20]), the diffusion of contaminations (release agent molecules) inside the resin can be justified by the second Fick's law.
Resulting, two aspects become relevant for the subsequent demoldability and consequently bonding performance of the demolded parts, namely the interaction of functional groups during the crosslinking reaction and the diffusion of contaminations inside the resin during its crosslinking process.
As stated before, the diffusion of the contaminations inside the resin is due to a difference in terms of the concentration.
This paper examines the contribution of diffusion to salt contamination of groundwater from leaky saline ponds.
The possibility to use vanadium redox couples in both half-cells, thereby eliminating the problem of cross contamination by diffusion of ions across the membrane is the advantage of vanadium redox rechargeable batteries.
This strong geographic differentiation between districts seems to reveal a social determination of fertility behavior and suggests a kind of "contamination" of neighborhoods and thus diffusion.
Allocation of GPs to the study groups in all the study settings was based on the GP practice they served in order to avoid the risk of contamination of individual GPs from information diffusion.
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