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research article

A new tool for the study of polymerization under supercritical conditions - preliminary results

Fortini, Sophie  
•
Lavanchy, Frederic  
•
Nising, Philip  
Show more
2004
Macromolecular Symposia

Efficient stirring is needed to realize heat flow anal. with a thermally homogeneous medium. Because dispersion polymn. with supercrit. fluids can be destabilized under stirring, a preliminary target has been to find a compromise between synthesis and basic reaction calorimetry requirements. This paper describes the use of poly(dimethylsiloxane) macromonomer with a mol. wt. 5000 g/mol as stabilizer for the dispersion polymn. of Me methacrylate in supercrit. carbon dioxide. The effect of stirring speed and stabilizer concn. has been examd. This study has shown that PMMA can be produced at high yield and mol. wt. using 10 wt. % (with respect to monomer) PDMS macromonomer at stirring speeds up to 600 rpm. A polymn. enthalpy of -57.6+-2 kJ/mol has been calcd. being in good agreement with previously reported data. Thus, preliminary results for the heat balance using the newly developed high pressure reaction calorimeter for supercrit. fluid applications have shown the important potential of reaction calorimetry to promote supercrit. fluid technologies at industrial scale allowing for the detn. of kinetics and thermodn. and safety data, resp.

  • Details
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Type
research article
DOI
10.1002/masy.200450207
Web of Science ID

WOS:000220207400008

Author(s)
Fortini, Sophie  
Lavanchy, Frederic  
Nising, Philip  
Meyer, Thierry  
Date Issued

2004

Published in
Macromolecular Symposia
Volume

206

Issue

Polymer Reaction Engineering V

Start page

79

End page

92

Subjects

Molecular weight; Molecular weight distribution (of PMMA; tool for study of polymn. of MMA under supercrit. conditions using PDMS as stabilizer); Polymerization enthalpy; Supercritical fluids (tool for study of polymn. of MMA under supercrit. conditions using PDMS as stabilizer); Polysiloxanes Role: NUU (Other use

•

unclassified)

•

USES (Uses) (tool for study of polymn. of MMA under supercrit. conditions using PDMS as stabilizer)

•

methyl methacrylate polymn supercrit fluid carbon dioxide PDMS stabilizer

Note

CAN 140:357777

35-4

Chemistry of Synthetic High Polymers

Institute of Chemical and Biological Process Science,Swiss Federal Institute of Technology,Lausanne,Switz.

Journal

written in English.

124-38-9 (Carbon dioxide); 9016-00-6 (Poly[oxy(dimethylsilylene)]); 31900-57-9 (Dimethylsilanediol homopolymer) Role: NUU (Other use, unclassified), USES (Uses) (tool for study of polymn. of MMA under supercrit. conditions using PDMS as stabilizer); 9011-14-7P (PMMA) Role: SPN (Synthetic preparation), PREP (Preparation) (tool for study of polymn. of MMA under supercrit. conditions using PDMS as stabilizer)

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GSCP  
Available on Infoscience
February 9, 2009
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/34827
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