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In-line monitoring of latex-particle size during emulsion polymerizations with a high polymer content of more than 60%

The photon density wave (PDW) spectroscopy is established in the fields of biochemistry and food chemistry as an online analytical method for the determination of mean particle sizes. This work examines PDW spectroscopy regarding its potential in high solid content emulsion polymerization. For this...

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Autores principales: Jacob, Laurence Isabelle, Pauer, Werner
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055508/
https://www.ncbi.nlm.nih.gov/pubmed/35519727
http://dx.doi.org/10.1039/d0ra02523b
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author Jacob, Laurence Isabelle
Pauer, Werner
author_facet Jacob, Laurence Isabelle
Pauer, Werner
author_sort Jacob, Laurence Isabelle
collection PubMed
description The photon density wave (PDW) spectroscopy is established in the fields of biochemistry and food chemistry as an online analytical method for the determination of mean particle sizes. This work examines PDW spectroscopy regarding its potential in high solid content emulsion polymerization. For this reason, emulsion copolymerization with a tendency for agglomeration of vinyl acetate and Versa® 10 in a molar ratio of 9 : 1, and with varying emulsifier content, was carried out in semi-batch operation mode with different target particle sizes from 50 to 325 nm. A redox initiator system, consisting of l-ascorbic acid, tert-butyl hydroperoxide and ammonium iron(iii) sulfate, was used as a radical source. The mean particle sizes of PDW spectroscopy were compared with those of conventional offline measurement methods, such as dynamic light scattering (DLS) and sedimentation analysis, by means of a disc centrifuge. The determined mean particle sizes show a very good reproducibility and agreement between DLS and sedimentation analysis up to a polymer content of 36%, after which measurements were rendered difficult due to agglomeration. Nevertheless, PDW spectroscopy was able to continue providing reproducible measurements until reaching a polymer content of 63%.
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spelling pubmed-90555082022-05-04 In-line monitoring of latex-particle size during emulsion polymerizations with a high polymer content of more than 60% Jacob, Laurence Isabelle Pauer, Werner RSC Adv Chemistry The photon density wave (PDW) spectroscopy is established in the fields of biochemistry and food chemistry as an online analytical method for the determination of mean particle sizes. This work examines PDW spectroscopy regarding its potential in high solid content emulsion polymerization. For this reason, emulsion copolymerization with a tendency for agglomeration of vinyl acetate and Versa® 10 in a molar ratio of 9 : 1, and with varying emulsifier content, was carried out in semi-batch operation mode with different target particle sizes from 50 to 325 nm. A redox initiator system, consisting of l-ascorbic acid, tert-butyl hydroperoxide and ammonium iron(iii) sulfate, was used as a radical source. The mean particle sizes of PDW spectroscopy were compared with those of conventional offline measurement methods, such as dynamic light scattering (DLS) and sedimentation analysis, by means of a disc centrifuge. The determined mean particle sizes show a very good reproducibility and agreement between DLS and sedimentation analysis up to a polymer content of 36%, after which measurements were rendered difficult due to agglomeration. Nevertheless, PDW spectroscopy was able to continue providing reproducible measurements until reaching a polymer content of 63%. The Royal Society of Chemistry 2020-07-15 /pmc/articles/PMC9055508/ /pubmed/35519727 http://dx.doi.org/10.1039/d0ra02523b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Jacob, Laurence Isabelle
Pauer, Werner
In-line monitoring of latex-particle size during emulsion polymerizations with a high polymer content of more than 60%
title In-line monitoring of latex-particle size during emulsion polymerizations with a high polymer content of more than 60%
title_full In-line monitoring of latex-particle size during emulsion polymerizations with a high polymer content of more than 60%
title_fullStr In-line monitoring of latex-particle size during emulsion polymerizations with a high polymer content of more than 60%
title_full_unstemmed In-line monitoring of latex-particle size during emulsion polymerizations with a high polymer content of more than 60%
title_short In-line monitoring of latex-particle size during emulsion polymerizations with a high polymer content of more than 60%
title_sort in-line monitoring of latex-particle size during emulsion polymerizations with a high polymer content of more than 60%
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055508/
https://www.ncbi.nlm.nih.gov/pubmed/35519727
http://dx.doi.org/10.1039/d0ra02523b
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