Thermal aging of carbon black filled rubber compounds. I. Experimental evidence for bridging flocculation
An extensive work was performed to analyze how and why electrical properties of carbon black filled rubber compounds change during thermal aging. Several compounds were prepared using different polymer matrices and a broad range of carbon black types. Electrical resistivity of cured and uncured samp...
| Publicado: |
2003
|
|---|---|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00323861_v44_n23_p7229_Schwartz http://hdl.handle.net/20.500.12110/paper_00323861_v44_n23_p7229_Schwartz |
| Aporte de: |
| id |
paper:paper_00323861_v44_n23_p7229_Schwartz |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_00323861_v44_n23_p7229_Schwartz2023-06-08T15:00:10Z Thermal aging of carbon black filled rubber compounds. I. Experimental evidence for bridging flocculation Carbon black Electrical resistivity Polymer composite materials Carbon black Electric conductivity Flocculation Thermal effects Transmission electron microscopy Thermal aging Rubber carbon rubber Flocculation article bridging flocculation carbon mineralization chemical interaction correlation analysis data analysis electric resistance electrical conductivity parameters electrochemical analysis flocculation gamma radiation heating polymerization sampling temperature measurement thermal analysis transmission electron microscopy An extensive work was performed to analyze how and why electrical properties of carbon black filled rubber compounds change during thermal aging. Several compounds were prepared using different polymer matrices and a broad range of carbon black types. Electrical resistivity of cured and uncured samples was measured, under different conditions, during thermal aging at constant temperature. Other experimental techniques, like transmission electron microscopy, bound rubber measurements and gamma irradiation were also used. Contrary to previous works, it was found that the changes of the electrical resistivity might be explained without any movement of carbon black aggregates during aging. Additionally, a new dependence of the variation of electrical resistivity with carbon black loading is reported and analyzed. This dependence could be the source of the contradictory data and conclusions in previous works. A correlation between the increment of electrical conductivity and the increment of bound rubber during thermal aging was found. This fact suggests that polymer chains and polymer-filler interaction are responsible for the changes during thermal aging instead of aggregate movement. © 2003 Elsevier Ltd. All rights reserved. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00323861_v44_n23_p7229_Schwartz http://hdl.handle.net/20.500.12110/paper_00323861_v44_n23_p7229_Schwartz |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Carbon black Electrical resistivity Polymer composite materials Carbon black Electric conductivity Flocculation Thermal effects Transmission electron microscopy Thermal aging Rubber carbon rubber Flocculation article bridging flocculation carbon mineralization chemical interaction correlation analysis data analysis electric resistance electrical conductivity parameters electrochemical analysis flocculation gamma radiation heating polymerization sampling temperature measurement thermal analysis transmission electron microscopy |
| spellingShingle |
Carbon black Electrical resistivity Polymer composite materials Carbon black Electric conductivity Flocculation Thermal effects Transmission electron microscopy Thermal aging Rubber carbon rubber Flocculation article bridging flocculation carbon mineralization chemical interaction correlation analysis data analysis electric resistance electrical conductivity parameters electrochemical analysis flocculation gamma radiation heating polymerization sampling temperature measurement thermal analysis transmission electron microscopy Thermal aging of carbon black filled rubber compounds. I. Experimental evidence for bridging flocculation |
| topic_facet |
Carbon black Electrical resistivity Polymer composite materials Carbon black Electric conductivity Flocculation Thermal effects Transmission electron microscopy Thermal aging Rubber carbon rubber Flocculation article bridging flocculation carbon mineralization chemical interaction correlation analysis data analysis electric resistance electrical conductivity parameters electrochemical analysis flocculation gamma radiation heating polymerization sampling temperature measurement thermal analysis transmission electron microscopy |
| description |
An extensive work was performed to analyze how and why electrical properties of carbon black filled rubber compounds change during thermal aging. Several compounds were prepared using different polymer matrices and a broad range of carbon black types. Electrical resistivity of cured and uncured samples was measured, under different conditions, during thermal aging at constant temperature. Other experimental techniques, like transmission electron microscopy, bound rubber measurements and gamma irradiation were also used. Contrary to previous works, it was found that the changes of the electrical resistivity might be explained without any movement of carbon black aggregates during aging. Additionally, a new dependence of the variation of electrical resistivity with carbon black loading is reported and analyzed. This dependence could be the source of the contradictory data and conclusions in previous works. A correlation between the increment of electrical conductivity and the increment of bound rubber during thermal aging was found. This fact suggests that polymer chains and polymer-filler interaction are responsible for the changes during thermal aging instead of aggregate movement. © 2003 Elsevier Ltd. All rights reserved. |
| title |
Thermal aging of carbon black filled rubber compounds. I. Experimental evidence for bridging flocculation |
| title_short |
Thermal aging of carbon black filled rubber compounds. I. Experimental evidence for bridging flocculation |
| title_full |
Thermal aging of carbon black filled rubber compounds. I. Experimental evidence for bridging flocculation |
| title_fullStr |
Thermal aging of carbon black filled rubber compounds. I. Experimental evidence for bridging flocculation |
| title_full_unstemmed |
Thermal aging of carbon black filled rubber compounds. I. Experimental evidence for bridging flocculation |
| title_sort |
thermal aging of carbon black filled rubber compounds. i. experimental evidence for bridging flocculation |
| publishDate |
2003 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00323861_v44_n23_p7229_Schwartz http://hdl.handle.net/20.500.12110/paper_00323861_v44_n23_p7229_Schwartz |
| _version_ |
1768542878826496000 |