On the kinetics of styrene emulsion polymerization above CMC. II. Comparison with experimental results

Abstract Although blends of modifiers have been used in the manufacture of SBR elastomers and similar polymers in emulsion systems for a long time, no studies of the kinetics of their reaction nor of their effect on molecular weights have been reported. This is such a study. Model equations for blends of modifiers are derived to predict modifier depletion and polymer molecular weight. These equations are used to serve as guides for preparing blends of modifiers in SBR-type polymerizations and for comparisons with experimental results.

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Kinetics of ethane oxidation in a high pressure jet-stirred reactor : experimental results

Journal de Chimie Physique ◽

10.1051/jcp/1990871173 ◽

1990 ◽

Vol 87 ◽

pp. 1173-1185 ◽

Cited By ~ 3

Author(s):

P Dagaut ◽

M Cathonnet

Keyword(s):

High Pressure ◽

Experimental Results ◽

Ethane Oxidation ◽

Stirred Reactor ◽

Kinetics Of

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Investigation of cultivated lavender (Lavandula officinalis L.) extraction and its extracts

Chemical Industry and Chemical Engineering Quarterly ◽

10.2298/ciceq120715103n ◽

2014 ◽

Vol 20 (1) ◽

pp. 71-86 ◽

Cited By ~ 13

Author(s):

Vesna Nadjalin ◽

Zika Lepojevic ◽

Mihailo Ristic ◽

Jelena Vladic ◽

Branislava Nikolovski ◽

...

Keyword(s):

Gas Chromatography ◽

Essential Oil ◽

Experimental Results ◽

Flame Ionisation Detector ◽

Main Components ◽

Lavandula Officinalis ◽

Physical And Chemical ◽

Kinetics Of ◽

Flame Ionisation ◽

Ionisation Detector

In this study essential oil content was determined in lavender flowers and leaves by hydrodistillation. Physical and chemical characteristics of the isolated oils were determined. By using CO2 in supercritical state the extraction of lavender flowers was performed with a selected solvent flow under isothermal and isobaric conditions. By the usage of gas chromatography in combination with mass spectrometry (GC/MS) and gas chromatography with flame ionisation detector (GC/FID) the qualitative and quantitative analysis of the obtained essential oil and supercritical extracts (SFE) was carried out. Also, the analysis of individual SFE extracts obtained during different extraction times was performed. It turned out that the main components of the analysed samples were linalool, linalool acetate, lavandulol, caryophyllene oxide, lavandulyl acetate, terpinen-4-ol and others. Two proposed models were used for modelling the extraction system lavender flower - supercritical CO2 on the basis of experimental results obtained by examining the extraction kinetics of this system. The applied models fitted well with the experimental results.

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Etude par spectrométrie infrarouge de l'action de solvants aprotiques sur l'association ester–eau et ester–Ba2+. Discussion du rôle catalytique du solvant et de l'ion Ba2+ dans l'hydrolyse alcaline du propionate de methyle

Canadian Journal of Chemistry ◽

10.1139/v79-067 ◽

1979 ◽

Vol 57 (4) ◽

pp. 400-403 ◽

Cited By ~ 1

Author(s):

Anne Le Narvor ◽

Pierre Saumagne

Keyword(s):

Ir Spectra ◽

Charge Density ◽

Carbonyl Group ◽

Alkaline Hydrolysis ◽

Experimental Results ◽

Methyl Propionate ◽

Orbital Control ◽

Different Types ◽

Kinetics Of ◽

Better Than

The ir spectra of mixtures of methyl propionate/water and methyl propionate/Ba2+ in dimethylsulfoxide and in acetonitrile have been recorded in the region of the νCO mode of the ester. Evidence is presented to indicate the presence of different types of complexes; their concentration was determined as a function of the composition of the medium. The spectroscopic results are compared to those from the kinetics of the alkaline hydrolysis in the same conditions. It is demonstrated that the orbital control explains the experimental results better than does the charge density on the carbon of the carbonyl group. [Journal translation]

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