A laboratory-scale continuous reaction system using a stirred tank reactor was assembled in our laboratory to study the dispersion polymerization of vinyl monomers in supercritical carbon dioxide (scCO2). The apparatus was equipped with a suitable downstream separation section to collect solid particles entrained in the effluent stream from the reactor, whose monomer concentration could be measured online with a gas chromatograph. The dispersion polymerization of methyl methacrylate in scCO2 was selected as a model process to be investigated in the apparatus. The experiments were performed at 65 °C and 25 MPa with 2,2'-azobisisobutyronitrile as the initiator and a reactive polysiloxane macromonomer as a surfactant to investigate the effect of the mean residence time of the reaction mixture on the monomer conversion, polymerization rate, polymer molecular weight, and particle size distribution. The results were compared with those obtained in batch polymerizations carried out under similar operative conditions.

GIACONIA A, FILARDO G, O SCIALDONE, GALIA A (2006). A continuous reaction system to investigate dispersion polymerization of vinyl monomers in supercritical carbon dioxide. JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY, 44, 4122-4135 [10.1002/pola.21513].

A continuous reaction system to investigate dispersion polymerization of vinyl monomers in supercritical carbon dioxide

FILARDO, Giuseppe;SCIALDONE, Onofrio;GALIA, Alessandro
2006-01-01

Abstract

A laboratory-scale continuous reaction system using a stirred tank reactor was assembled in our laboratory to study the dispersion polymerization of vinyl monomers in supercritical carbon dioxide (scCO2). The apparatus was equipped with a suitable downstream separation section to collect solid particles entrained in the effluent stream from the reactor, whose monomer concentration could be measured online with a gas chromatograph. The dispersion polymerization of methyl methacrylate in scCO2 was selected as a model process to be investigated in the apparatus. The experiments were performed at 65 °C and 25 MPa with 2,2'-azobisisobutyronitrile as the initiator and a reactive polysiloxane macromonomer as a surfactant to investigate the effect of the mean residence time of the reaction mixture on the monomer conversion, polymerization rate, polymer molecular weight, and particle size distribution. The results were compared with those obtained in batch polymerizations carried out under similar operative conditions.
2006
Settore ING-IND/27 - Chimica Industriale E Tecnologica
GIACONIA A, FILARDO G, O SCIALDONE, GALIA A (2006). A continuous reaction system to investigate dispersion polymerization of vinyl monomers in supercritical carbon dioxide. JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY, 44, 4122-4135 [10.1002/pola.21513].
File in questo prodotto:
File Dimensione Formato  
Giaconia_et_al-2006-Journal_of_Polymer_Science_Part_A%3A_Polymer_Chemistry.pdf

Solo gestori archvio

Descrizione: pdf
Dimensione 493.84 kB
Formato Adobe PDF
493.84 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/24226
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 7
social impact