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

artículo de publicación periódica.page.titleprefix
Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin

dc.contributor.author	Armanasco, Franco
dc.contributor.author	Chiacchiarelli, Leonel Matías
dc.contributor.author	D'hers, Sebastián
dc.date	info:eu-repo/date/embargoEnd/2023-10-07
dc.date.accessioned	2023-01-09T18:18:54Z
dc.date.available	2023-01-09T18:18:54Z
dc.date.issued	2022-10
dc.description.abstract	"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."	en
dc.identifier.issn	1097-4628
dc.identifier.uri	https://ri.itba.edu.ar/handle/123456789/4140
dc.language.iso	en	en
dc.relation	info:eu-repo/semantics/altIdentifier/doi/10.1002/app.53194
dc.relation	info:eu-repo/grantAgreement/ANPCyT/PICT/2015-N0475/AR. Ciudad Autónoma de Buenos Aires
dc.relation	info:eu-repo/grantAgreement/ANPCyT/PICT/2015-N0425/AR. Ciudad Autónoma de Buenos Aires
dc.subject	POLIURETANOS	es
dc.subject	ACEITE DE SOJA	es
dc.subject	BIOPOLIMEROS	es
dc.title	Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin	en
dc.type	Artículo de Publicación Periódica	es
dc.type	info:eu-repo/semantics/acceptedVersion
dspace.entity.type	Artículo de Publicación Periódica
itba.description.filiation	Fil: Armanasco, Franco. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina.
itba.description.filiation	Fil: Armanasco, Franco. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
itba.description.filiation	Fil: Chiacchiarelli, Leonel Matías. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina.
itba.description.filiation	Fil: Chiacchiarelli, Leonel Matías. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
itba.description.filiation	Fil: D'hers, Sebastián. Instituto Tecnológico de Buenos Aires; Argentina.