Kinetic control of aqueous polymerization using radicals generated in different spin states

Autores
Rintoul, Ignacio
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
1) Background: Magnetic fields can interact with liquid matter in a homogeneous and instantaneous way, without physical contact, independently of its temperature, pressure and agitation degree and without modifying recipes nor heat and mass transfer conditions. In addition, magnetic fields may affect the mechanisms of generation and termination of free radicals. This paper is devoted to the elucidation of the appropriate conditions needed to develop magnetic field effects for controlling the kinetics of polymerization of water soluble monomers. 2) Methods: Thermal and photochemically initiated polymerizations were investigated at different initiator and monomer concentrations, temperatures, viscosities and magnetic field intensities. 3) Results: Significant magnetic field impact on the polymerization kinetics was only observed in photochemically initiated polymerizations carried out in viscous media and performed at relatively low magnetic field intensity. Magnetic field effects were absent in polymerizations in low viscosity media and thermally initiated polymerizations performed at low and high magnetic field intensities. The effects were explained in terms of the radical pair mechanism for intersystem crossing of spin states. 4) Conclusion: Polymerization kinetics of water soluble monomers can be potentially controlled using magnetic fields only under very specific reaction conditions.
Fil: Rintoul, Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Materia
MAGNETIC FIELD
RADICAL POLYMERIZATION
QUANTUM CHEMISTRY
ACRYLAMIDE
SOLUTION POLYMERIZATION
PHOTOPOLYMERIZATION
PROCESS CONTROL
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/20779
Acceder
id CONICETDig_3f2a2d643cfc7875162417ae88a313b6
oai_identifier_str oai:ri.conicet.gov.ar:11336/20779
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Kinetic control of aqueous polymerization using radicals generated in different spin statesRintoul, IgnacioMAGNETIC FIELDRADICAL POLYMERIZATIONQUANTUM CHEMISTRYACRYLAMIDESOLUTION POLYMERIZATIONPHOTOPOLYMERIZATIONPROCESS CONTROLhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/11) Background: Magnetic fields can interact with liquid matter in a homogeneous and instantaneous way, without physical contact, independently of its temperature, pressure and agitation degree and without modifying recipes nor heat and mass transfer conditions. In addition, magnetic fields may affect the mechanisms of generation and termination of free radicals. This paper is devoted to the elucidation of the appropriate conditions needed to develop magnetic field effects for controlling the kinetics of polymerization of water soluble monomers. 2) Methods: Thermal and photochemically initiated polymerizations were investigated at different initiator and monomer concentrations, temperatures, viscosities and magnetic field intensities. 3) Results: Significant magnetic field impact on the polymerization kinetics was only observed in photochemically initiated polymerizations carried out in viscous media and performed at relatively low magnetic field intensity. Magnetic field effects were absent in polymerizations in low viscosity media and thermally initiated polymerizations performed at low and high magnetic field intensities. The effects were explained in terms of the radical pair mechanism for intersystem crossing of spin states. 4) Conclusion: Polymerization kinetics of water soluble monomers can be potentially controlled using magnetic fields only under very specific reaction conditions.Fil: Rintoul, Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaMDPI2017-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/20779Rintoul, Ignacio; Kinetic control of aqueous polymerization using radicals generated in different spin states; MDPI; Processes; 5; 2; 3-2017; 15-272227-9717CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.mdpi.com/2227-9717/5/2/15info:eu-repo/semantics/altIdentifier/doi/10.3390/pr5020015info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:37:52Zoai:ri.conicet.gov.ar:11336/20779instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:37:52.858CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Kinetic control of aqueous polymerization using radicals generated in different spin states
title Kinetic control of aqueous polymerization using radicals generated in different spin states
spellingShingle Kinetic control of aqueous polymerization using radicals generated in different spin states
Rintoul, Ignacio
MAGNETIC FIELD
RADICAL POLYMERIZATION
QUANTUM CHEMISTRY
ACRYLAMIDE
SOLUTION POLYMERIZATION
PHOTOPOLYMERIZATION
PROCESS CONTROL
title_short Kinetic control of aqueous polymerization using radicals generated in different spin states
title_full Kinetic control of aqueous polymerization using radicals generated in different spin states
title_fullStr Kinetic control of aqueous polymerization using radicals generated in different spin states
title_full_unstemmed Kinetic control of aqueous polymerization using radicals generated in different spin states
title_sort Kinetic control of aqueous polymerization using radicals generated in different spin states
dc.creator.none.fl_str_mv Rintoul, Ignacio
author Rintoul, Ignacio
author_facet Rintoul, Ignacio
author_role author
dc.subject.none.fl_str_mv MAGNETIC FIELD
RADICAL POLYMERIZATION
QUANTUM CHEMISTRY
ACRYLAMIDE
SOLUTION POLYMERIZATION
PHOTOPOLYMERIZATION
PROCESS CONTROL
topic MAGNETIC FIELD
RADICAL POLYMERIZATION
QUANTUM CHEMISTRY
ACRYLAMIDE
SOLUTION POLYMERIZATION
PHOTOPOLYMERIZATION
PROCESS CONTROL
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 1) Background: Magnetic fields can interact with liquid matter in a homogeneous and instantaneous way, without physical contact, independently of its temperature, pressure and agitation degree and without modifying recipes nor heat and mass transfer conditions. In addition, magnetic fields may affect the mechanisms of generation and termination of free radicals. This paper is devoted to the elucidation of the appropriate conditions needed to develop magnetic field effects for controlling the kinetics of polymerization of water soluble monomers. 2) Methods: Thermal and photochemically initiated polymerizations were investigated at different initiator and monomer concentrations, temperatures, viscosities and magnetic field intensities. 3) Results: Significant magnetic field impact on the polymerization kinetics was only observed in photochemically initiated polymerizations carried out in viscous media and performed at relatively low magnetic field intensity. Magnetic field effects were absent in polymerizations in low viscosity media and thermally initiated polymerizations performed at low and high magnetic field intensities. The effects were explained in terms of the radical pair mechanism for intersystem crossing of spin states. 4) Conclusion: Polymerization kinetics of water soluble monomers can be potentially controlled using magnetic fields only under very specific reaction conditions.
Fil: Rintoul, Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
description 1) Background: Magnetic fields can interact with liquid matter in a homogeneous and instantaneous way, without physical contact, independently of its temperature, pressure and agitation degree and without modifying recipes nor heat and mass transfer conditions. In addition, magnetic fields may affect the mechanisms of generation and termination of free radicals. This paper is devoted to the elucidation of the appropriate conditions needed to develop magnetic field effects for controlling the kinetics of polymerization of water soluble monomers. 2) Methods: Thermal and photochemically initiated polymerizations were investigated at different initiator and monomer concentrations, temperatures, viscosities and magnetic field intensities. 3) Results: Significant magnetic field impact on the polymerization kinetics was only observed in photochemically initiated polymerizations carried out in viscous media and performed at relatively low magnetic field intensity. Magnetic field effects were absent in polymerizations in low viscosity media and thermally initiated polymerizations performed at low and high magnetic field intensities. The effects were explained in terms of the radical pair mechanism for intersystem crossing of spin states. 4) Conclusion: Polymerization kinetics of water soluble monomers can be potentially controlled using magnetic fields only under very specific reaction conditions.
publishDate 2017
dc.date.none.fl_str_mv 2017-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/20779
Rintoul, Ignacio; Kinetic control of aqueous polymerization using radicals generated in different spin states; MDPI; Processes; 5; 2; 3-2017; 15-27
2227-9717
CONICET Digital
CONICET
url http://hdl.handle.net/11336/20779
identifier_str_mv Rintoul, Ignacio; Kinetic control of aqueous polymerization using radicals generated in different spin states; MDPI; Processes; 5; 2; 3-2017; 15-27
2227-9717
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.mdpi.com/2227-9717/5/2/15
info:eu-repo/semantics/altIdentifier/doi/10.3390/pr5020015
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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