Reaction monitoring of the MMA polymerization at marginal dispersion stability

The free-radical dispersion polymn. of Me methacrylate was studied using the reaction calorimetry technique. An esp. developed calorimeter for use with supercrit. fluids was employed and a set of expts. was explicitly designed to isolate the effect of the pressure. It was found that, under marginal dispersion stability conditions, small pressure changes can have significant effects on the reaction evolution. The pressure was also found to affect the partitioning of the monomer between the two reaction phases. The heat released during the nucleation stage of the reaction was measured for the first time and permitted the discussion on the polymn. locus during this stage.


Published in:
AIChE Journal, 54, 2, 529-536
Year:
2008
Publisher:
Wiley-Blackwell
ISSN:
0001-1541
Keywords:
Note:
CAN 148:308700, 35-4, Chemistry of Synthetic High Polymers, Institute of Chemical Sciences and Engineering, Group of Chemical and Physical Safety,Ecole Polytechnique Federale de Lausanne,Lausanne,Switz., Journal, 0001-1541, written in English., 67-63-0 (Isopropanol) Role: NUU (Other use, unclassified), USES (Uses) (monitoring of Me methacrylate polymn. at marginal dispersion stability); 80-62-6 (Methyl methacrylate) Role: PEP (Physical, engineering or chemical process), RCT (Reactant), PROC (Process), RACT (Reactant or reagent) (monitoring of Me methacrylate polymn. at marginal dispersion stability); 9011-14-7P (Methyl methacrylate homopolymer) Role: PRP (Properties), SPN (Synthetic preparation), PREP (Preparation) (monitoring of Me methacrylate polymn. at marginal dispersion stability); 78-67-1 (AIBN) Role: CAT (Catalyst use), USES (Uses) (polymn. catalyst; monitoring of Me methacrylate polymn. at marginal dispersion stability); 881169-34-2 (Polydimethyl siloxane methacrylate) Role: NUU (Other use, unclassified), USES (Uses) (stabilizer; monitoring of Me methacrylate polymn. at marginal dispersion stability); 124-38-9 (Carbon dioxide) Role: NUU (Other use, unclassified), USES (Uses) (supercrit.; monitoring of Me methacrylate polymn. at marginal dispersion stability)
Laboratories:




 Record created 2009-02-09, last modified 2018-01-28


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