Correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide)

A set of diglycidylether of bisphenol-A (DGEBA)/ 4,4′-diaminodiphenylmethane (DDM) epoxy matrix modified with poly(ethylene oxide) (PEO), pre-cured at two different temperatures, was examined by positron annihilation lifetime spectroscopy (PALS). The aim was to investigate the correlation between lo...

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Autores principales: Ramos, J.A., Larrañaga, M., Mondragon, I., Salgueiro, W., Somoza, A., Goyanes, S., Rubiolo, G.H.
Formato: JOUR
Materias:
Antiplasticization
Blends
Epoxy resins
PALS
Toughness
Crack paths
Cure schedule
Cure temperature
Cured epoxy resins
Diaminodiphenylmethane
Diglycidyl ether of bisphenol-A
Epoxy matrices
Flexural strength
Linear additivity
Local free volume
Nanohole
Nearest-neighbor
Negative deviations
Nonuniform
OH group
Positron annihilation lifetime spectroscopy
Self-association
Amines
Association reactions
Curing
Ethylene
Fracture
Fracture toughness
Free volume
Insecticides
Mechanical properties
Phenols
Polyethylene oxides
Positron annihilation spectroscopy
Positrons
Resins
blend
fracture
mechanical property
synthetic resin
toughness
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10427147_v20_n1_p35_Ramos
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_10427147_v20_n1_p35_Ramos2023-10-03T15:58:10Z Correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide) Ramos, J.A. Larrañaga, M. Mondragon, I. Salgueiro, W. Somoza, A. Goyanes, S. Rubiolo, G.H. Antiplasticization Blends Epoxy resins PALS Toughness Antiplasticization Blends Crack paths Cure schedule Cure temperature Cured epoxy resins Diaminodiphenylmethane Diglycidyl ether of bisphenol-A Epoxy matrices Flexural strength Linear additivity Local free volume Nanohole Nearest-neighbor Negative deviations Nonuniform OH group PALS Positron annihilation lifetime spectroscopy Self-association Amines Association reactions Curing Ethylene Fracture Fracture toughness Free volume Insecticides Mechanical properties Phenols Polyethylene oxides Positron annihilation spectroscopy Positrons Resins Epoxy resins blend fracture mechanical property synthetic resin toughness A set of diglycidylether of bisphenol-A (DGEBA)/ 4,4′-diaminodiphenylmethane (DDM) epoxy matrix modified with poly(ethylene oxide) (PEO), pre-cured at two different temperatures, was examined by positron annihilation lifetime spectroscopy (PALS). The aim was to investigate the correlation between local free volume and mechanical properties. A negative deviation from the linear additivity rule of the local free volume is observed at both cure schedules. Using together the local free volume and mechanical results allows to conclude that the cure temperature makes small contribution to the flexural strength and modulus of blends but is responsible for the composition-dependent rise of the fracture toughness. It is proposed that this behavior is a consequence of the nearest-neighbor intrachain contacts or self-association of the epoxy-OH groups during cure leading to a non-uniform space distribution of the DGEBA-PEO contacts, which causes the deflection of the crack path. Copyright © 2008 John Wiley & Sons, Ltd. Fil:Goyanes, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10427147_v20_n1_p35_Ramos
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Antiplasticization
Blends
Epoxy resins
PALS
Toughness
Antiplasticization
Blends
Crack paths
Cure schedule
Cure temperature
Cured epoxy resins
Diaminodiphenylmethane
Diglycidyl ether of bisphenol-A
Epoxy matrices
Flexural strength
Linear additivity
Local free volume
Nanohole
Nearest-neighbor
Negative deviations
Nonuniform
OH group
PALS
Positron annihilation lifetime spectroscopy
Self-association
Amines
Association reactions
Curing
Ethylene
Fracture
Fracture toughness
Free volume
Insecticides
Mechanical properties
Phenols
Polyethylene oxides
Positron annihilation spectroscopy
Positrons
Resins
Epoxy resins
blend
fracture
mechanical property
synthetic resin
toughness
spellingShingle Antiplasticization
Blends
Epoxy resins
PALS
Toughness
Antiplasticization
Blends
Crack paths
Cure schedule
Cure temperature
Cured epoxy resins
Diaminodiphenylmethane
Diglycidyl ether of bisphenol-A
Epoxy matrices
Flexural strength
Linear additivity
Local free volume
Nanohole
Nearest-neighbor
Negative deviations
Nonuniform
OH group
PALS
Positron annihilation lifetime spectroscopy
Self-association
Amines
Association reactions
Curing
Ethylene
Fracture
Fracture toughness
Free volume
Insecticides
Mechanical properties
Phenols
Polyethylene oxides
Positron annihilation spectroscopy
Positrons
Resins
Epoxy resins
blend
fracture
mechanical property
synthetic resin
toughness
Ramos, J.A.
Larrañaga, M.
Mondragon, I.
Salgueiro, W.
Somoza, A.
Goyanes, S.
Rubiolo, G.H.
Correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide)
topic_facet Antiplasticization
Blends
Epoxy resins
PALS
Toughness
Antiplasticization
Blends
Crack paths
Cure schedule
Cure temperature
Cured epoxy resins
Diaminodiphenylmethane
Diglycidyl ether of bisphenol-A
Epoxy matrices
Flexural strength
Linear additivity
Local free volume
Nanohole
Nearest-neighbor
Negative deviations
Nonuniform
OH group
PALS
Positron annihilation lifetime spectroscopy
Self-association
Amines
Association reactions
Curing
Ethylene
Fracture
Fracture toughness
Free volume
Insecticides
Mechanical properties
Phenols
Polyethylene oxides
Positron annihilation spectroscopy
Positrons
Resins
Epoxy resins
blend
fracture
mechanical property
synthetic resin
toughness
description A set of diglycidylether of bisphenol-A (DGEBA)/ 4,4′-diaminodiphenylmethane (DDM) epoxy matrix modified with poly(ethylene oxide) (PEO), pre-cured at two different temperatures, was examined by positron annihilation lifetime spectroscopy (PALS). The aim was to investigate the correlation between local free volume and mechanical properties. A negative deviation from the linear additivity rule of the local free volume is observed at both cure schedules. Using together the local free volume and mechanical results allows to conclude that the cure temperature makes small contribution to the flexural strength and modulus of blends but is responsible for the composition-dependent rise of the fracture toughness. It is proposed that this behavior is a consequence of the nearest-neighbor intrachain contacts or self-association of the epoxy-OH groups during cure leading to a non-uniform space distribution of the DGEBA-PEO contacts, which causes the deflection of the crack path. Copyright © 2008 John Wiley & Sons, Ltd.
format JOUR
author Ramos, J.A.
Larrañaga, M.
Mondragon, I.
Salgueiro, W.
Somoza, A.
Goyanes, S.
Rubiolo, G.H.
author_facet Ramos, J.A.
Larrañaga, M.
Mondragon, I.
Salgueiro, W.
Somoza, A.
Goyanes, S.
Rubiolo, G.H.
author_sort Ramos, J.A.
title Correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide)
title_short Correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide)
title_full Correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide)
title_fullStr Correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide)
title_full_unstemmed Correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide)
title_sort correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide)
url http://hdl.handle.net/20.500.12110/paper_10427147_v20_n1_p35_Ramos
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