| Titre : | Study of butyl methacrylate depropagation behavior using batch experiments in combination with modeling (2009) |
| Auteurs : | Wei Wang, Auteur ; Robin A. Hutchinson, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 10, Mai 2009) |
| Article en page(s) : | pp. 4810–4816 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | 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 |
