Free-radical dispersion polymerization of methyl methacrylate in supercritical carbon dioxide: a parametric analysis with reaction calorimetry
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A review, with 17 refs., on research carried out by the polymer reaction engineering group at EPFL in reaction engineering, including kinetic modeling of polymn. reactions (lab. and pilot scale reactors), free radical, polyepoxydation, polycondensation. De ...
A kinetic model for solid-state polycondensation of nylon-6 was developed by extrapolation of the melt chemistry to the amorphous phase of the solid polymer. In this way, a phenomenological description of the process was obtained that required examining al ...
Many models have been developed to describe the kinetics of the free radical polymn. of Me methacrylate (MMA). However, they are restricted to low temps., e.g., below the glass transition temp. of the polymer, Tg. In this work, kinetics of bulk and soln. p ...
A review, with .apprx.43 refs. A review of different types of biol. reaction calorimetry systems currently used together with the operating principles is presented. The av. resoln. of these systems is approx. 20 to 1000 mW l-1, sufficient for studies of a ...
The aim of this work was to investigate the degradation of the anti-adhesive properties of protective PTFE films during the hot embossing of thermoplasts, and to identify possible failure causes which reduce the lifetime of these films. A comparative XPS s ...
Supersilyl alk. metals (alkali supersilanides) tBu3SiM without or with donors (Do) like ethers, amines, arom. hydrocarbons are easily obtained by the action of alk. metals M on supersilyl halides tBu3SiX above room temp. in alkanes or donor-solvents like T ...
A method of producing a microencapsulated pharmaceutical formulation is disclosed comprising causing a dye to be attached to the surface of pharmaceutical particles or particle clusters and applying a source of radiant energy to the dye in the presence of ...
The radical addn. co-polymn. of 2-hydroxyethyl methacrylate and Bu acrylate is carried out in a continuously operating Buss-Kneader. To calc. temp. profiles over the length of the kneader the heat balance is solved. For the heat transfer coeff. a model bas ...
In addn. to online detection of events in biotechnol., calorimetry could be used to control processes. In the latter case, a correct and instantaneous heat signal must be available. This would be possible only if a correct evaluation of baseline evolution ...
Bench-scale heat flux calorimetry is applied to monitor complex microbial systems producing secondary metabolites and having a rheol. complex behavior. With such systems, biol. metabolic activity can only be measured accurately if calorimetry is improved b ...
