Highly functional lactic acid ring-opened soybean polyols applied to rigid polyurethane foams

"We synthesized polyols with high hydroxyl functionalities (FOHs), between 9.0 and 12.6, and characterized them with differential scanning calorimetry, thermogravimetric analysis, and size exclusion chromatography after we parametrically studied the ring-opening reaction of epoxidized soybean o...

Descripción completa

Detalles Bibliográficos
Autores principales: Herrán, Rodrigo, Amalvy, Javier Ignacio, Chiacchiarelli, Leonel Matías
Formato: Artículos de Publicaciones Periódicas acceptedVersion
Lenguaje:Inglés
Publicado: info
Materias:
BIOPOLIMEROS
POLIURETANOS
ESPUMAS
ACEITE DE SOJA
ACIDO LACTICO
Acceso en línea:http://ri.itba.edu.ar/handle/123456789/1862
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-1862
record_format dspace
spelling I32-R138-123456789-18622022-12-07T13:06:00Z Highly functional lactic acid ring-opened soybean polyols applied to rigid polyurethane foams Herrán, Rodrigo Amalvy, Javier Ignacio Chiacchiarelli, Leonel Matías BIOPOLIMEROS POLIURETANOS ESPUMAS ACEITE DE SOJA ACIDO LACTICO "We synthesized polyols with high hydroxyl functionalities (FOHs), between 9.0 and 12.6, and characterized them with differential scanning calorimetry, thermogravimetric analysis, and size exclusion chromatography after we parametrically studied the ring-opening reaction of epoxidized soybean oil with lactic acid (LA) as a function of the reaction temperature and lactic acid equivalent frac-tion (fLA). An increase of only 20C in the reaction temperature (from 80 to 100C) caused changes in the hydroxyl number (+17.8%), FOH (–25%), viscosity (–14.0%), and oligomeric content (–24.1%). fLA mostly affected the ring-opening yield, and only for fLA values above 0.4 was possible to achieve values higher than 80%. Rigid polyurethane foams (rPUFs) were synthesized and characterized with scanning electron microscopy, dynamic mechanical analysis (DMA), and compressive mechanical tests. rPUFs with a very high specific compres-sive strength (7.8 kPa kg–1 m3) were synthesized solely with biobased soybean oil. DMA revealed a compromised relationship between the specific compressive strength and its temperature dependence. To increase the first one, the most relevant method was to increase FOH. Instead, to increase the latter one, the OH number had to be maximized." info:eu-repo/date/embargoEnd/2020-04-23 2020-01-21T15:11:24Z 2020-01-21T15:11:24Z 2019-10 Artículos de Publicaciones Periódicas info:eu-repo/semantics/acceptedVersion 0021-8995 http://ri.itba.edu.ar/handle/123456789/1862 en info:eu-repo/grantAgreement/ANPCyT/PICT/2015-N0475/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/semantics/altIdentifier/doi/10.1002/app.47959 info:eu-repo/semantics/embargoedAccess 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 BIOPOLIMEROS
POLIURETANOS
ESPUMAS
ACEITE DE SOJA
ACIDO LACTICO
spellingShingle BIOPOLIMEROS
POLIURETANOS
ESPUMAS
ACEITE DE SOJA
ACIDO LACTICO
Herrán, Rodrigo
Amalvy, Javier Ignacio
Chiacchiarelli, Leonel Matías
Highly functional lactic acid ring-opened soybean polyols applied to rigid polyurethane foams
topic_facet BIOPOLIMEROS
POLIURETANOS
ESPUMAS
ACEITE DE SOJA
ACIDO LACTICO
description "We synthesized polyols with high hydroxyl functionalities (FOHs), between 9.0 and 12.6, and characterized them with differential scanning calorimetry, thermogravimetric analysis, and size exclusion chromatography after we parametrically studied the ring-opening reaction of epoxidized soybean oil with lactic acid (LA) as a function of the reaction temperature and lactic acid equivalent frac-tion (fLA). An increase of only 20C in the reaction temperature (from 80 to 100C) caused changes in the hydroxyl number (+17.8%), FOH (–25%), viscosity (–14.0%), and oligomeric content (–24.1%). fLA mostly affected the ring-opening yield, and only for fLA values above 0.4 was possible to achieve values higher than 80%. Rigid polyurethane foams (rPUFs) were synthesized and characterized with scanning electron microscopy, dynamic mechanical analysis (DMA), and compressive mechanical tests. rPUFs with a very high specific compres-sive strength (7.8 kPa kg–1 m3) were synthesized solely with biobased soybean oil. DMA revealed a compromised relationship between the specific compressive strength and its temperature dependence. To increase the first one, the most relevant method was to increase FOH. Instead, to increase the latter one, the OH number had to be maximized."
format Artículos de Publicaciones Periódicas
acceptedVersion
author Herrán, Rodrigo
Amalvy, Javier Ignacio
Chiacchiarelli, Leonel Matías
author_facet Herrán, Rodrigo
Amalvy, Javier Ignacio
Chiacchiarelli, Leonel Matías
author_sort Herrán, Rodrigo
title Highly functional lactic acid ring-opened soybean polyols applied to rigid polyurethane foams
title_short Highly functional lactic acid ring-opened soybean polyols applied to rigid polyurethane foams
title_full Highly functional lactic acid ring-opened soybean polyols applied to rigid polyurethane foams
title_fullStr Highly functional lactic acid ring-opened soybean polyols applied to rigid polyurethane foams
title_full_unstemmed Highly functional lactic acid ring-opened soybean polyols applied to rigid polyurethane foams
title_sort highly functional lactic acid ring-opened soybean polyols applied to rigid polyurethane foams
publishDate info
url http://ri.itba.edu.ar/handle/123456789/1862
work_keys_str_mv AT herranrodrigo highlyfunctionallacticacidringopenedsoybeanpolyolsappliedtorigidpolyurethanefoams
AT amalvyjavierignacio highlyfunctionallacticacidringopenedsoybeanpolyolsappliedtorigidpolyurethanefoams
AT chiacchiarellileonelmatias highlyfunctionallacticacidringopenedsoybeanpolyolsappliedtorigidpolyurethanefoams
_version_ 1765660914330107904

Ejemplares similares