Journal Article10.1002/POL.1972.170101216
Computer simulation for the cooligomerization system
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TL;DR: In this article, a computer simulation was carried out to clarify the kinetic features of the styrene (A)−methyl methacrylate (B)−CCl4(S) cooligomerization system, and the experimental data on the degree of polymerization and the deviation of the cooligome composition from the statistical steady-state composition were comparatively well explained by calculations based on the kinetic equations derived from the assumed reaction scheme and the values of the velocity coefficients.
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Abstract: In order to clarify the kinetic features of the styrene (A)–methyl methacrylate (B)–CCl4(S) cooligomerization system, a computer simulation was carried out. The experimental data on the degree of polymerization and the deviation of the cooligomer composition from the statistical steady-state composition were comparatively well explained by calculations based on the kinetic equations derived from the assumed reaction scheme and the values of the velocity coefficients, although the values of the four velocity coefficients in the initiation step and the velocity coefficient of the termination by the coupling of two solvent radicals were estimated. The results of the calculation of the rate of each component reaction show that the following two reactions are the most important in the initiation and in the transfer and termination steps when the [S]/([A] + [B]) ratio is large:
where, A, A*, and P are styrene, polystyryl radical, and the cooligomer, respectively. Moreover, it was concluded that the deviation of the cooligomer composition from the statistical steady-state composition was caused by these two reactions.
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Citations
Simplified treatment of cooligomerization kinetics
TL;DR: In this article, the degree of polymerization and the cooligomer composition were derived from the assumed reaction scheme by the use of some assumptions for simplification, and their appropriateness was examined.
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Initiation and termination mechanism in the cooligomerization of the styrene–methyl methacrylate–carbon tetrachloride system
TL;DR: In this article, an analysis of the endgroups of the oligomers produced in the styrene-methyl methacrylate-CCl4(S) system (system I, system II, and system III) was carried out in order to clarify the mechanism of the initiation, transfer, and termination.
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The Monte Carlo Method and Applications
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Synthèse de cotélomères photoréticulables, 6. Utilisation de cotélomères biséquencés†
Bernard Boutevin,M. Maliszewicz +1 more
TL;DR: In this paper, the authors synthesize crosslinkable block cotelomers in three steps: in the first step a monomer M1 was telomerized with carbon tetrachloride or chloroform, in the second step M2 with the resulting macrotelogen, and in the third step the hydroxyl groups were esterified by cinnamic acid or acrylic acid.
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References
Degree of polymerization and chain transfer in methyl methacrylate
TL;DR: In this article, the chain transfer constants of twenty-six solvents in the polymerization of methyl methacrylate have been calculated, using Mayo's equation for chain-transfer reaction, from the measured values of degree of polymerization.
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