Document Type
Article
Publication Date
1-2018
Abstract
The control of morphology and interface in poly(styrene-ethylene/butylene-styrene) (SEBS) composites with graphitic fillers is extremely important for the design of piezoresistive sensors for body motion or flexible temperature sensors. The effects of a high amount of graphite (G) and silane coupling agent on the morphology and properties of SEBS composites with anisotropic mechanical properties are reported. The physical and chemical bonding of silane to both G and SEBS surface was proved by EDX and TGA results; this improved interface influenced both the thermal and mechanical properties of the composite. The vinyltriethoxysilane (VS) promoted the formation of char residue and, being tightly bound to both SEBS and G, did not show separate decomposition peak in the TGA curve of composites. The mechanical properties were measured on two perpendicular directions and were improved by both the addition of VS and the increased amount of G; however, the increase of storage modulus due to orientation (from 5 to 15 times depending on the composition and direction of the test) was more important than that provided by the increase of G concentration, which was a maximum of four times that obtained for 15 wt % graphite. A mechanism to explain the influence of G content and treatment on the variation of storage modulus and tan δ depending on the direction of the test was also proposed.
Recommended Citation
Panaitescu, Denis Mihaela, et al. “Block Copolymer Elastomer with Graphite Filler: Effect of Processing Conditions and Silane Coupling Agent on the Composite Properties.” Polymers, vol. 10, no. 1, 1, Multidisciplinary Digital Publishing Institute, Jan. 2018, p. 46, https://doi.org/10.3390/polym10010046
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Publication Title
Polymers
DOI
10.3390/polym10010046
Comments
Original published version available at https://doi.org/10.3390/polym10010046