Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin

"Thermosetting polyurethanes were obtained using an aromatic isocyanate and a hydrophobic polyol formulation obtained from epoxidized soybean oil (ESO) crosslinked with glycerin. A systematic DSC analysis of the effect of catalyst type, crosslinker concentration, isocyanate index and ESO crysta...

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Autores principales: Armanasco, Franco, Chiacchiarelli, Leonel Matías, D'hers, Sebastián
Formato: Artículo de Publicación Periódica acceptedVersion
Lenguaje:Inglés
Publicado: info
Materias:
POLIURETANOS
ACEITE DE SOJA
BIOPOLIMEROS
Acceso en línea:https://ri.itba.edu.ar/handle/123456789/4140
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-4140
record_format dspace
spelling I32-R138-123456789-41402023-01-11T03:01:08Z Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin Armanasco, Franco Chiacchiarelli, Leonel Matías D'hers, Sebastián POLIURETANOS ACEITE DE SOJA BIOPOLIMEROS "Thermosetting polyurethanes were obtained using an aromatic isocyanate and a hydrophobic polyol formulation obtained from epoxidized soybean oil (ESO) crosslinked with glycerin. A systematic DSC analysis of the effect of catalyst type, crosslinker concentration, isocyanate index and ESO crystallization on cure kinetics was conducted. The combination of a stannic catalyst at 0.2 wt% and glycerin at 20 wt% produced a cure kinetics governed by an autocatalytic heat flow where vitrification played a key role in the formation of chemical bonds. The evolution of Tg as a function of conversion, which followed Di-Benedetto's predictions, supported the hypothesis that vitrification was a preponderant phenomenon during cure. Dynamic Mechanical Analysis (DMA) of a post-cured sample revealed a Tg centered at 220°C, whereas quasi-static flexural mechanical tests shown a flexural modulus of 2.14 GPa and a flexural strength of 99.4 MPa. Rheological experiments at isothermal conditions supported the hypothesis that vitrification played a key role in the evolution of apparent viscosity. A master model using Kim-Macosko equations was obtained for the proposed formulation. The results presented in this work will serve to further extend the use of biobased polymers applied in the polymer composite industry." info:eu-repo/date/embargoEnd/2023-10-07 2023-01-09T18:18:54Z 2023-01-09T18:18:54Z 2022-10 Artículo de Publicación Periódica info:eu-repo/semantics/acceptedVersion 1097-4628 https://ri.itba.edu.ar/handle/123456789/4140 en info:eu-repo/semantics/altIdentifier/doi/10.1002/app.53194 info:eu-repo/grantAgreement/ANPCyT/PICT/2015-N0475/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/grantAgreement/ANPCyT/PICT/2015-N0425/AR. Ciudad Autónoma de Buenos Aires application/pdf
institution Instituto Tecnológico de Buenos Aires (ITBA)
institution_str I-32
repository_str R-138
collection Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA)
language Inglés
topic POLIURETANOS
ACEITE DE SOJA
BIOPOLIMEROS
spellingShingle POLIURETANOS
ACEITE DE SOJA
BIOPOLIMEROS
Armanasco, Franco
Chiacchiarelli, Leonel Matías
D'hers, Sebastián
Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin
topic_facet POLIURETANOS
ACEITE DE SOJA
BIOPOLIMEROS
description "Thermosetting polyurethanes were obtained using an aromatic isocyanate and a hydrophobic polyol formulation obtained from epoxidized soybean oil (ESO) crosslinked with glycerin. A systematic DSC analysis of the effect of catalyst type, crosslinker concentration, isocyanate index and ESO crystallization on cure kinetics was conducted. The combination of a stannic catalyst at 0.2 wt% and glycerin at 20 wt% produced a cure kinetics governed by an autocatalytic heat flow where vitrification played a key role in the formation of chemical bonds. The evolution of Tg as a function of conversion, which followed Di-Benedetto's predictions, supported the hypothesis that vitrification was a preponderant phenomenon during cure. Dynamic Mechanical Analysis (DMA) of a post-cured sample revealed a Tg centered at 220°C, whereas quasi-static flexural mechanical tests shown a flexural modulus of 2.14 GPa and a flexural strength of 99.4 MPa. Rheological experiments at isothermal conditions supported the hypothesis that vitrification played a key role in the evolution of apparent viscosity. A master model using Kim-Macosko equations was obtained for the proposed formulation. The results presented in this work will serve to further extend the use of biobased polymers applied in the polymer composite industry."
format Artículo de Publicación Periódica
acceptedVersion
author Armanasco, Franco
Chiacchiarelli, Leonel Matías
D'hers, Sebastián
author_facet Armanasco, Franco
Chiacchiarelli, Leonel Matías
D'hers, Sebastián
author_sort Armanasco, Franco
title Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin
title_short Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin
title_full Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin
title_fullStr Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin
title_full_unstemmed Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin
title_sort kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin
publishDate info
url https://ri.itba.edu.ar/handle/123456789/4140
work_keys_str_mv AT armanascofranco kineticandchemorheologicalmodelingofthermosettingpolyurethanesobtainedfromanepoxidizedsoybeanoilpolyolcrosslinkedwithglycerin
AT chiacchiarellileonelmatias kineticandchemorheologicalmodelingofthermosettingpolyurethanesobtainedfromanepoxidizedsoybeanoilpolyolcrosslinkedwithglycerin
AT dherssebastian kineticandchemorheologicalmodelingofthermosettingpolyurethanesobtainedfromanepoxidizedsoybeanoilpolyolcrosslinkedwithglycerin
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