Journal
POLYMER
Volume 181, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2019.121789
Keywords
Tensile fracture; Organic-inorganic interface; Rubber; Brass; Adhesive interface; In situ tensile deformation experiments; Transmission electron microscopy
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Funding
- JSPS KAKENHI, Japan [16H02288, 19H00905]
- ImPACT Program of the Council for Science, Technology and Innovation (Cabinet Office, Government of Japan)
- Grants-in-Aid for Scientific Research [19H00905, 16H02288] Funding Source: KAKEN
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Composites of polymers and inorganic materials have recently attracted considerable attention as lightweight tough materials. In this study, we examined the structures and fracture paths at the adhesive interfaces between a sulfur-containing rubber compound and brass formed during vulcanization. Samples consisting of brass fillers dispersed in a rubber matrix were subjected to in situ tensile observations using transmission electron microscopy. Upon uniaxial stretching, fracture occurred between the rubber compound and outermost CuxS layers of the adhesive interface. With prolonged vulcanization, the adhesive interface became broader and depletion regions of Cu and Zn appeared inside the particles, indicating sample degradation, owing to outward diffusion of the metal elements into the rubber compound. Fracture of the degraded rubber composite occurred along the depletion regions. These observations demonstrate that the adhesiveness of brass and rubber composites strongly depends on the interfacial structures.
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