期刊
COMPOSITES PART B-ENGINEERING
卷 57, 期 -, 页码 242-249出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.10.006
关键词
Polymer-matrix composites (PMCs); Electrical properties; Mechanical testing; Extrusion
资金
- FEDER through the COMPETE Program
- Portuguese Foundation for Science and Technology (FCT) [PEST-C/FIS/UI607/2011, PTDC/CTM-NAN/112574/2009]
- FCT [SFRH/BD/64267/2009]
- Matepro -Optimizing Materials and Processes [NORTE-07-0124-FEDER-000037]
- Programa Operacional Regional do Norte (ON.2 - O Novo Norte), under the Quadro de Referencia Estrategico Nacional (QREN), through the Fundo Europeu de Desenvolvimento Regional (FEDER)
- COST Actions [MP1003, MP0902]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/64267/2009] Funding Source: FCT
Tri-block copolymer styrene-butadiene-styrene (SBS) composites with different butadiene/styrene ratios and multi-walled carbon nanotubes (MWCNTs) can be used for the development of electromechanical sensors for large strains applications. Extruded CNT/SBS composites show percolation thresholds around 5 wt%, electro-mechanical properties with high sensibility at larger strain and the gauge factor reach values up to 30 at strains of 20%. The butadiene/styrene ratio has influence in the mechanical and electro-mechanical properties. In one hand, the increase of the styrene content in copolymer increasing initial mechanical modulus, on the other hand, the increase of the butadiene content leads to larger maximum deformations and higher electro-mechanical sensibility for strains up to 20%. Further, applied initial pre-stress increases the electro-mechanical sensibility of the composites. (c) 2013 Elsevier Ltd. All rights reserved.
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