A SAXS and swelling study of cured natural rubber/styrene-butadiene rubber blends

A small-angle X-ray scattering (SAXS) and swelling study of natural rubber and styrene-butadiene rubber blends (NR/SBR) is presented. To this aim, specimens of NR and SBR and blends with 75/25, 50/50, and 25/75 NR/SBR ratios (in phr) were prepared at a cure temperature of 433 K and the optimum cure...

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Detalles Bibliográficos
Publicado: 2009
Materias:
Blends
NR
Rubber
Rubber blends
SAXS
SBR
Vulcanization
Benzothiazoles
Butadiene rubber
Chemical crosslinks
Cure temperature
Cure time
Lorentz
Natural Rubber
Network chains
Q-values
Scattering curve
Scattering vectors
Single phase
Small angle X-ray scattering
Styrene butadiene rubber
Sulfenamides
Swelling studies
Swelling test
Third level
Torque curves
Butadiene
Crosslinking
Curing
Scattering
Styrene
X ray scattering
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08876266_v47_n23_p2320_Salgueiro
http://hdl.handle.net/20.500.12110/paper_08876266_v47_n23_p2320_Salgueiro
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_08876266_v47_n23_p2320_Salgueiro2023-06-08T15:46:55Z A SAXS and swelling study of cured natural rubber/styrene-butadiene rubber blends Blends NR Rubber Rubber blends SAXS SBR Vulcanization Benzothiazoles Butadiene rubber Chemical crosslinks Cure temperature Cure time Lorentz Natural Rubber Network chains NR Q-values Rubber blends Scattering curve Scattering vectors Single phase Small angle X-ray scattering Styrene butadiene rubber Sulfenamides Swelling studies Swelling test Third level Torque curves Butadiene Crosslinking Curing Scattering Styrene Vulcanization X ray scattering Rubber A small-angle X-ray scattering (SAXS) and swelling study of natural rubber and styrene-butadiene rubber blends (NR/SBR) is presented. To this aim, specimens of NR and SBR and blends with 75/25, 50/50, and 25/75 NR/SBR ratios (in phr) were prepared at a cure temperature of 433 K and the optimum cure time (t100). This time was obtained from rheometer torque curves. The system of cure used in the samples was sulfur/n-t-butyl-2-benzothiazole sulfenamide. From swelling tests of the cured samples, information about the molecular weight of the network chain between chemical crosslinks was obtained. For all cured compounds, in the Lorentz plots built from SAXS scattering curves, a maximum of the scattering vector q around 0.14 Å -1 was observed. However, the q position shows a linear-like shift toward lower values when the SBR content in the SBR/NR blend increases. In pure NR or SBR the q values show a different tendency. The results obtained are discussed in terms of the existence of different levels of vulcanization for each single phase forming the blend and the existence of a third level of vulcanization located in the interfacial NR/SBR layer. © 2009 Wiley Periodicals, Inc. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08876266_v47_n23_p2320_Salgueiro http://hdl.handle.net/20.500.12110/paper_08876266_v47_n23_p2320_Salgueiro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Blends
NR
Rubber
Rubber blends
SAXS
SBR
Vulcanization
Benzothiazoles
Butadiene rubber
Chemical crosslinks
Cure temperature
Cure time
Lorentz
Natural Rubber
Network chains
NR
Q-values
Rubber blends
Scattering curve
Scattering vectors
Single phase
Small angle X-ray scattering
Styrene butadiene rubber
Sulfenamides
Swelling studies
Swelling test
Third level
Torque curves
Butadiene
Crosslinking
Curing
Scattering
Styrene
Vulcanization
X ray scattering
Rubber
spellingShingle Blends
NR
Rubber
Rubber blends
SAXS
SBR
Vulcanization
Benzothiazoles
Butadiene rubber
Chemical crosslinks
Cure temperature
Cure time
Lorentz
Natural Rubber
Network chains
NR
Q-values
Rubber blends
Scattering curve
Scattering vectors
Single phase
Small angle X-ray scattering
Styrene butadiene rubber
Sulfenamides
Swelling studies
Swelling test
Third level
Torque curves
Butadiene
Crosslinking
Curing
Scattering
Styrene
Vulcanization
X ray scattering
Rubber
A SAXS and swelling study of cured natural rubber/styrene-butadiene rubber blends
topic_facet Blends
NR
Rubber
Rubber blends
SAXS
SBR
Vulcanization
Benzothiazoles
Butadiene rubber
Chemical crosslinks
Cure temperature
Cure time
Lorentz
Natural Rubber
Network chains
NR
Q-values
Rubber blends
Scattering curve
Scattering vectors
Single phase
Small angle X-ray scattering
Styrene butadiene rubber
Sulfenamides
Swelling studies
Swelling test
Third level
Torque curves
Butadiene
Crosslinking
Curing
Scattering
Styrene
Vulcanization
X ray scattering
Rubber
description A small-angle X-ray scattering (SAXS) and swelling study of natural rubber and styrene-butadiene rubber blends (NR/SBR) is presented. To this aim, specimens of NR and SBR and blends with 75/25, 50/50, and 25/75 NR/SBR ratios (in phr) were prepared at a cure temperature of 433 K and the optimum cure time (t100). This time was obtained from rheometer torque curves. The system of cure used in the samples was sulfur/n-t-butyl-2-benzothiazole sulfenamide. From swelling tests of the cured samples, information about the molecular weight of the network chain between chemical crosslinks was obtained. For all cured compounds, in the Lorentz plots built from SAXS scattering curves, a maximum of the scattering vector q around 0.14 Å -1 was observed. However, the q position shows a linear-like shift toward lower values when the SBR content in the SBR/NR blend increases. In pure NR or SBR the q values show a different tendency. The results obtained are discussed in terms of the existence of different levels of vulcanization for each single phase forming the blend and the existence of a third level of vulcanization located in the interfacial NR/SBR layer. © 2009 Wiley Periodicals, Inc.
title A SAXS and swelling study of cured natural rubber/styrene-butadiene rubber blends
title_short A SAXS and swelling study of cured natural rubber/styrene-butadiene rubber blends
title_full A SAXS and swelling study of cured natural rubber/styrene-butadiene rubber blends
title_fullStr A SAXS and swelling study of cured natural rubber/styrene-butadiene rubber blends
title_full_unstemmed A SAXS and swelling study of cured natural rubber/styrene-butadiene rubber blends
title_sort saxs and swelling study of cured natural rubber/styrene-butadiene rubber blends
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08876266_v47_n23_p2320_Salgueiro
http://hdl.handle.net/20.500.12110/paper_08876266_v47_n23_p2320_Salgueiro
_version_ 1768542510664122368

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