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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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10427147_v20_n1_p35_Ramos http://hdl.handle.net/20.500.12110/paper_10427147_v20_n1_p35_Ramos |
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paper:paper_10427147_v20_n1_p35_Ramos2023-06-08T16:00:59Z Correlation between nanohole volume and mechanical properties of amine-cured epoxy resin blended withl poly(ethylene oxide) Goyanes, Silvia Nair 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. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10427147_v20_n1_p35_Ramos 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 Goyanes, Silvia Nair 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. |
| author |
Goyanes, Silvia Nair |
| author_facet |
Goyanes, Silvia Nair |
| author_sort |
Goyanes, Silvia Nair |
| 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) |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10427147_v20_n1_p35_Ramos http://hdl.handle.net/20.500.12110/paper_10427147_v20_n1_p35_Ramos |
| work_keys_str_mv |
AT goyanessilvianair correlationbetweennanoholevolumeandmechanicalpropertiesofaminecuredepoxyresinblendedwithlpolyethyleneoxide |
| _version_ |
1768543524704223232 |