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Modelling of polymerization reactions

2. Computer simulation of iodine initiated polymerization of styrene

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Summary

The paper reports the development of a mathematical model which has been applied to the polymerization of styrene initiated by iodine in ethylene dichloride solution. Our previous work on the system concluded for a pseudocationic mechanism based on the admission of non-ionic propagating species.

The computer analysis performed using the mathematical model allowed us to derive theoretical conversion-and conductivity-time curves which perfectly reproduce the experimental shapes under different conditions. The agreement between the theoretical and experimental results demonstrates that the reaction mechanism previously formulated and the mathematical treatment proposed are correct.

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Abbreviations

M:

monomer (styrene)

MI:

unsaturated side product

MI2 :

styrene diiodide

Mn :

dead polymer chains

P ⋆n :

growing polymer chains

k1, k2, k3, k4:

initiation rate constants

k5:

propagation rate constant

k6:

chain breaking rate constant

K:

equilibrium constant

C:

conversion

a, b, c, d, e:

conductivity coefficients

λ:

specific conductivity

t:

time

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Authors and Affiliations

  1. Centro di Studi del Processi Ionici di Polimerizzazione e delle Proprietà Fisiche e Tecnologiche di Sistemi Macromolecolari del C.N.R., c/o Dipartimento di Ingegneria Chimica, Università di Pisa, via Diotisalvi 2, 1-56100, Pisa, Italy

    G. Maschio, P. Cerrai & P. Giusti

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  1. G. Maschio
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  2. P. Cerrai
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  3. P. Giusti
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Maschio, G., Cerrai, P. & Giusti, P. Modelling of polymerization reactions. Polymer Bulletin 8, 147–153 (1982). https://doi.org/10.1007/BF00263021

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  • DOI: https://doi.org/10.1007/BF00263021

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