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Effect of mixing on nonuniformly initiated polymerization by radiation
Author(s) -
Kawakami Waichiro,
Machi Sueo
Publication year - 1973
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690190114
Subject(s) - polymerization , mixing (physics) , polymer , molar mass distribution , materials science , irradiation , radiation , polymer chemistry , dose rate , chemistry , thermodynamics , chemical engineering , composite material , radiochemistry , optics , physics , nuclear physics , quantum mechanics , engineering
An analytical study was carried out on the effects of mixing on radiation‐induced polymerization in which the species initiating the polymerization were not uniformly produced because of a nonuniform dose rate distribution. The analysis is based on the periodic irradiation of fluid elements circulating in a stirred‐tank reactor having a high dose rate region and a very low dose rate region. It is shown that the rate of polymerization increases with agitation speed and that the bimodal molecular weight distribution of the polymer formed at low agitation speed moves to a unimodal distribution as the agitation speed increases.