[article] 
inIndustrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 4810–4816

Titre :	Study of butyl methacrylate depropagation behavior using batch experiments in combination with modeling
Type de document :	texte imprimé
Auteurs :	Wei Wang, Auteur ; Robin A. Hutchinson, Auteur
Année de publication :	2009
Article en page(s) :	pp. 4810–4816
Note générale :	Chemical engineering
Langues :	Anglais (eng)
Mots-clés :	Butyl methacrylate Polymerization Depropagation behavior
Résumé :	Batch polymerization experiments are combined with simulations to investigate the depropagation behavior of butyl methacrylate (BMA). Experiments carried out between 110 and 145 °C and polymer contents between 9 and 34 wt %, including experiments conducted with added polymer, indicate that equilibrium monomer concentration ([M]eq) varies not only with temperature but also with polymer content. An extended Predici model provides a good fit to the monomer concentration and polymer molecular weight profiles, with the simulated monomer profiles at 132 and 145 °C sensitive to small changes in the depropagation activation energy. Thus, these data provide a better estimate of depropagation kinetics than those measured by the pulsed-laser polymerization/size-exclusion chromatography method. The entire data set is well-represented by [M]eq (mol·L −1) = 1.76 × 106(1 − 0.778xwp) exp(−6240/T), in which xwp represents the weight fraction of polymer in the system.
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie900060x

[article] Study of butyl methacrylate depropagation behavior using batch experiments in combination with modeling [texte imprimé] / Wei Wang, Auteur ; Robin A. Hutchinson, Auteur . - 2009 . - pp. 4810–4816.
Chemical engineering
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 4810–4816

Mots-clés :	Butyl methacrylate Polymerization Depropagation behavior
Résumé :	Batch polymerization experiments are combined with simulations to investigate the depropagation behavior of butyl methacrylate (BMA). Experiments carried out between 110 and 145 °C and polymer contents between 9 and 34 wt %, including experiments conducted with added polymer, indicate that equilibrium monomer concentration ([M]eq) varies not only with temperature but also with polymer content. An extended Predici model provides a good fit to the monomer concentration and polymer molecular weight profiles, with the simulated monomer profiles at 132 and 145 °C sensitive to small changes in the depropagation activation energy. Thus, these data provide a better estimate of depropagation kinetics than those measured by the pulsed-laser polymerization/size-exclusion chromatography method. The entire data set is well-represented by [M]eq (mol·L −1) = 1.76 × 106(1 − 0.778xwp) exp(−6240/T), in which xwp represents the weight fraction of polymer in the system.
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie900060x