Effect of rubber compounding agent on adhesion strength between rubber and heat-assisted plasma-treated polytetrafluoroethylene (PTFE)
Autor: | Yuji Ohkubo, Masafumi Shibahara, Asahiro Nagatani, Katsuyoshi Endo, Kazuya Yamamura, Koji Honda, Kento Ishihara |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
010407 polymers
X-ray photoelectron spectroscopy Materials science 01 natural sciences complex mixtures Adhesion strength chemistry.chemical_compound surface treatment by exited gases Natural rubber rubber compounding agent Materials Chemistry Adhesive-free adhesion Composite material Polytetrafluoroethylene technology industry and agriculture Surfaces and Interfaces General Chemistry Plasma Adhesion 0104 chemical sciences Surfaces Coatings and Films body regions chemistry Mechanics of Materials Compounding silica visual_art visual_art.visual_art_medium Adhesive fluoropolymers psychological phenomena and processes |
Zdroj: | Journal of Adhesion. 95(3):242-257 |
ISSN: | 1545-5823 |
Popis: | Although heat-assisted plasma treatment enables drastic improvement of the adhesion property of polytetrafluoroethylene (PTFE), plasma-treated PTFE does not strongly adhere to any adherend. To clarify which rubber compounding agents positively affect the adhesion strength of a plasma-treated PTFE/rubber assembly, six types of unvulcanised rubbers were prepared and thermally compressed to a plasma-treated PTFE sheet. Thus, it was found that SiO 2 addition to rubber drastically increased the adhesion strength of a plasma-treated PTFE/rubber assembly and cohesion failure of rubber occurred with large fractions of SiO 2 although no adhesives were used. To confirm the reaction between plasma-treated PTFE and SiO 2 powder, X-ray photoelectron spectroscopy (XPS) measurements were performed for the thermally compressed SiO 2 /PTFE assembly after repeated washing. The XPS results indicated that hydrophilic SiO 2 powder strongly adhered to the plasma-treated PTFE, whereas hydrophobic SiO 2 powder did not adhere to the PTFE. In this paper, a model was proposed for a possible mechanism of strong adhesion of a PTFE/rubber assembly through both hydrogen and covalent bonds between silanol groups of the SiO 2 powder surface in the rubber and hydroxyl or carboxyl groups on the plasma-treated PTFE. |
Databáze: | OpenAIRE |
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