Computer Science
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..24.1199b&link_type=abstract
Advances in Space Research, Volume 24, Issue 10, p. 1199-1210.
Computer Science
1
Scientific paper
In this paper, the problem of searching for gravitationally sensitive mechanisms of polymerization in natural earth gravitational field and in artificial high gravity conditions is considered. Laboratory experiments and numerical modeling have revealed the existence of at least four reasons for gravitational sensitivity: sedimentation of polymeric microglobules, thermal and concentration convection, instability of polymerization front, immediate effect of the mass forces on a deformable polymer. The distinguishing features of the discovered mechanisms and their operation regions have been identified. It is shown that these mechanisms influence the polymerization processes and the final polymeric structure. The results of experimental investigation in microgravity conditions are given for comparison. It has been found, that in the orbital environment on ``Mir'' station the convective flows of reaction mixture are absent and polymerization develops as a frontal process, which provides homogeneity of the final polymer structure
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