Ultimate properties of rubber and core-shell modified epoxy matrices with different chain flexibilities

Preformed polystyrene-co-butylacrylate (PScoBu) core-shell particles and polystyrene microspheres as well as amine-terminated butadiene nitrile (ATBN) rubber have been used for modification of both rigid and more flexible crosslinked DGEBA-based epoxy networks having significantly different crosslin...

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Guardado en:
Detalles Bibliográficos
Publicado: 2001
Materias:
Atomic force microscopy
Crosslinking
Fracture toughness
Morphology
Rheology
Rubber
Scanning electron microscopy
Thermodynamic properties
Crosslink densities
Epoxy resins
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222461_v36_n4_p845_Ormaetxea
http://hdl.handle.net/20.500.12110/paper_00222461_v36_n4_p845_Ormaetxea
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00222461_v36_n4_p845_Ormaetxea
record_format dspace
spelling paper:paper_00222461_v36_n4_p845_Ormaetxea2023-06-08T14:47:43Z Ultimate properties of rubber and core-shell modified epoxy matrices with different chain flexibilities Atomic force microscopy Crosslinking Fracture toughness Morphology Rheology Rubber Scanning electron microscopy Thermodynamic properties Crosslink densities Epoxy resins Preformed polystyrene-co-butylacrylate (PScoBu) core-shell particles and polystyrene microspheres as well as amine-terminated butadiene nitrile (ATBN) rubber have been used for modification of both rigid and more flexible crosslinked DGEBA-based epoxy networks having significantly different crosslink densities. Some variations in cure kinetics have been shown by both thermal and rheological measurements. Independently of the crosslink density of the neat epoxy matrix, function of the cycloaliphatic or aliphatic hardener used, the toughening effect via core-shell modification has been found as good as that for rubber modification but with a better retention of thermal properties. Results are investigated as a function of the morphologies obtained by scanning electron microscopy (SEM) but also by atomic force microscopy (AFM). Larger fracture toughness was obtained for every-unmodified and modified-epoxy matrices cured with the aliphatic hardener as a consequence of the lower crosslink density of the corresponding mixtures. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222461_v36_n4_p845_Ormaetxea http://hdl.handle.net/20.500.12110/paper_00222461_v36_n4_p845_Ormaetxea
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Atomic force microscopy
Crosslinking
Fracture toughness
Morphology
Rheology
Rubber
Scanning electron microscopy
Thermodynamic properties
Crosslink densities
Epoxy resins
spellingShingle Atomic force microscopy
Crosslinking
Fracture toughness
Morphology
Rheology
Rubber
Scanning electron microscopy
Thermodynamic properties
Crosslink densities
Epoxy resins
Ultimate properties of rubber and core-shell modified epoxy matrices with different chain flexibilities
topic_facet Atomic force microscopy
Crosslinking
Fracture toughness
Morphology
Rheology
Rubber
Scanning electron microscopy
Thermodynamic properties
Crosslink densities
Epoxy resins
description Preformed polystyrene-co-butylacrylate (PScoBu) core-shell particles and polystyrene microspheres as well as amine-terminated butadiene nitrile (ATBN) rubber have been used for modification of both rigid and more flexible crosslinked DGEBA-based epoxy networks having significantly different crosslink densities. Some variations in cure kinetics have been shown by both thermal and rheological measurements. Independently of the crosslink density of the neat epoxy matrix, function of the cycloaliphatic or aliphatic hardener used, the toughening effect via core-shell modification has been found as good as that for rubber modification but with a better retention of thermal properties. Results are investigated as a function of the morphologies obtained by scanning electron microscopy (SEM) but also by atomic force microscopy (AFM). Larger fracture toughness was obtained for every-unmodified and modified-epoxy matrices cured with the aliphatic hardener as a consequence of the lower crosslink density of the corresponding mixtures.
title Ultimate properties of rubber and core-shell modified epoxy matrices with different chain flexibilities
title_short Ultimate properties of rubber and core-shell modified epoxy matrices with different chain flexibilities
title_full Ultimate properties of rubber and core-shell modified epoxy matrices with different chain flexibilities
title_fullStr Ultimate properties of rubber and core-shell modified epoxy matrices with different chain flexibilities
title_full_unstemmed Ultimate properties of rubber and core-shell modified epoxy matrices with different chain flexibilities
title_sort ultimate properties of rubber and core-shell modified epoxy matrices with different chain flexibilities
publishDate 2001
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222461_v36_n4_p845_Ormaetxea
http://hdl.handle.net/20.500.12110/paper_00222461_v36_n4_p845_Ormaetxea
_version_ 1768545451830673408

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