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- W2074236247 abstract "The anionic copolymerization of p- and m-divinylbenzene (DVB) with varying amounts of styrene (St) was studied. The molecular weights of the samples before gelation and of the sol fraction were followed according to their dependence on the applied ratio R′ = [St] [DVB]. Gelation occurred at critical values of R′c = 2.08 for the p-DVB/St and of R′c =2.80 for the p-DVB/St copolymers. The results are tentatively interpreted using Stockmayer's theory of the crosslinking of chains. A good agreement between theory and experiment was obtained for the polymers in the pregel state. The molecular weights of the polymers in the sol of the gel can be described by an equation that is similar to the Stockmayer equation, except the crosslinking probability is multiplied by the extinction probability, v. As v is closely related to the sol fraction, this fraction can be calculated from the applied R′ values and the experimentally observed molecular weights of the products. The sol fraction thus obtained was compared with the experimentally observed sol fraction. The differences between both sol fractions are discussed in some detail." @default.
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- W2074236247 date "2007-03-08" @default.
- W2074236247 modified "2023-09-27" @default.
- W2074236247 title "Conditions of gelation in the anionic divinylbenzene-styrene copolymerization" @default.
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- W2074236247 doi "https://doi.org/10.1002/polc.5070530104" @default.
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