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标题:What factors control the mechanical properties of poly (dimethylsiloxane) reinforced with nanosheets of 3-aminopropyltriethoxysilane modified graphene oxide?
时间:2020-03-27 00:39:32
DOI:10.1016/j.polymer.2013.04.057
作者:Zhang, Yan; Zhu, Yanwu; Lin, Gui
关键词:Experimental/ elasticity; elastomers; elongation; filled polymers; graphene; impact (mechanical); nanocomposites; silicones; ultrasonic dispersion; Young's modulus/ mechanical properties; reinforced poly (dimethylsiloxane); nanosheets; 3-aminopropyltriethoxysilane modified graphene oxide; interfacial bonding impact; reinforced silicone elastomers; poly (dimethylsiloxane); PDMS; Young's modulus; thermoplastics; aptes-modified graphite oxide; graphene sheets; ultrasonic dispersion; TEOS crosslinker; PDMS melt; APTES-modified filler particles; rubber-like elasticity; amino groups; elongation; filler aggregation; CO/ A8140J Elasticity and anelasticity A8140L Deformation, plasticity and creep A6220F Deformation and plasticity A6140K Structure of polymers, elastomers, and plastics A6220D Elasticity, elastic constants/ CO/bin C/bin O/bin
出版源: 《Polymer》 ,54 (14) :3605-3611
摘要:Graphite oxide (GO) was modified using 3-aminopropyltriethoxysilane (APTES) to investigate the impact of dispersion and interfacial bonding on the mechanical properties of reinforced silicone elastomer, poly (dimethylsiloxane), PDMS. Although a 71% enhancement of Young's modulus was observed (comparable to thermoplastics) at a loading of 3.0 wt% APTES-modified GO (A-GO), the observed enhancement factor is just 8% of that expected for randomly dispersed perfect graphene sheets. We attribute this less-than-ideal enhancement to crumping and break-up of the graphene sheets caused by ultrasonic dispersion. In the absence of TEOS crosslinker, the A-GO PDMS melt does not solidify so modulus enhancement is not due to crosslinking through the APTES-modified filler particles. Modulus enhancement due to rubber-like elasticity of the filler itself, however, may be active. Characterization indicates that amino groups are chemically attached to the surface of GO in A-GO. The improved dispersibility enhances the toughness, but only at low loadings. In fact, at 3-wt% loading the toughness is less than that of pure PDMS due to loss of elongation caused by filler aggregation. [All rights reserved Elsevier].
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目录:
  • What factors control the mechanical properties of poly (dimethylsiloxane) reinforced with nanosheets of 3-aminopropyltrieth ...
    • 1. Introduction
    • 2. Experimental
    • 3. Characterization
    • 4. Results and discussions
    • 5. Conclusions
    • Acknowledgments
    • Appendix A. Supplementary data
    • References

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