scholarly journals Photo-thermal polymerization of nanotube/polymer composites: Effects of load transfer and mechanical strength

2012 ◽  
Vol 100 (13) ◽  
pp. 131907 ◽  
Author(s):  
Peng Xu ◽  
James Loomis ◽  
Balaji Panchapakesan
Keyword(s):  
Mechanical Strength ◽  
Polymer Composites ◽  
Load Transfer ◽  
Thermal Polymerization

Synergism in Binary (MWNT, SLG) Nano-carbons in Polymer Nano-composites: A Raman Study

2013 ◽  
Vol 1505 ◽  
Author(s):  
Peng Xu ◽  
James Loomis ◽  
Ben King ◽  
Balaji Panchapakesan
Keyword(s):  
Mechanical Strength ◽  
Polymer Composites ◽  
Load Transfer ◽  
Synergistic Effects ◽  
Cooperative Behavior ◽  
Single Layer Graphene ◽  
Polymeric Chain ◽  
Uniaxial Tensile ◽  
Advanced Composites ◽  
Nano Carbon

ABSTRACTLoad transfer and mechanical strength of reinforced polymers are fundamental to developing advanced composites. This paper demonstrates enhanced load transfer and mechanical strength due to synergistic effects in binary mixtures of nano-carbon/polymer composites. Different compositional mixtures (always 1 wt. % total) of multi-wall carbon nanotubes (MWNTs) and single-layer graphene (SLG) were mixed in polydimethylsiloxane (PDMS), and effects on load transfer and mechanical strength were studied using Raman spectroscopy. Significant shifts in the G-bands were observed both in tension and compression for single as well binary nano-carbon counterparts in polymer composites. Small amounts of MWNT0.1 dispersed in SLG0.9/PDMS samples (subscripts represents weight percentage) reversed the sign of the Raman wavenumbers from positive to negative values demonstrating reversal of lattice stress. A wavenumber change from 10 cm-1 in compression (-10% strain) to 10 cm-1 in tension (50% strain), and an increase in elastic modulus of ∼103% was observed for MWNT0.1SLG0.9/PDMS with applied uniaxial tension. Presence of MWNTs in the matrix reduced the segmental polymeric chain length and provided limited extensibility to the chains. This in turn eliminated compressive deformation of SLG and significantly enhanced load transfer and mechanical strength of composites in tension. The orientation order of MWNT with application of uniaxial tensile strain directly affected the shift in Raman wavenumbers (2D band and G-band) and load transfer. It is observed that the cooperative behavior of binary nano-carbons in polymer composites resulted in enhanced load transfer and mechanical strength. Such binary compositions could be fundamental to developing advanced composites.

Anisotropically Functionalized Nanotube Anchors for Improving the Mechanical Strength of Immiscible Polymer Composites

2020 ◽  
Author(s):  
Lawrence Barrett ◽  
Fatoumata Ide Seyni ◽  
Mallikharjuna Rao Komarneni ◽  
John A. Zapata-Hincapie ◽  
Daniel T. Glatzhofer ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Polymer Composites ◽  
Immiscible Polymer

Tensile Properties of Epoxy Matrix Reinforced with Fique Fabric

2020 ◽  
Vol 1012 ◽  
pp. 14-19
Author(s):  
Michelle Souza Oliveira ◽  
Fabio da Costa Garcia Filho ◽  
Fernanda Santos da Luz ◽  
Artur Camposo Pereira ◽  
Luana Cristyne da Cruz Demosthenes ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Polymer Composites ◽  
Natural Fiber ◽  
Volume Fraction ◽  
Fiber Reinforced Polymer ◽  
Epoxy Composites ◽  
Synthetic Fiber ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites

Composite materials are being extensively studied for ballistic armor. Their main advantage is connected to the possibility of deeply reducing weight and costs by maintaining high performances in terms of strength and security. Epoxy composites are reinforced with natural fibers which are replacing other synthetic reinforcement materials. Composites are prepared using polymers as matrix material because of ease of production with different reinforcements. The mechanical strength of the natural fiber reinforced polymer composites has been compared with synthetic fiber reinforced polymer composites and it is found that for achieving equivalent mechanical strength of the material, the volume fraction of the natural fiber should be much higher than synthetic fiber. This work being an experimental study on untreated “as received” fique fabric-reinforced epoxy composites, to demonstrate the potential of this renewable source of natural fiber for use in a number of applications.

Processing and Properties of Polymer Composites Reinforced by Functionalized SWNTs

2005 ◽  
Vol 475-479 ◽  
pp. 1059-1062 ◽  
Author(s):  
Jiang Zhu ◽  
Valery Khabashesku ◽  
M. Ashraf Imam ◽  
Roger Crane ◽  
Karen Lozano ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Polymer Composites ◽  
Load Transfer ◽  
Epoxy Polymer ◽  
Necessary Conditions ◽  
Single Wall Carbon Nanotubes ◽  
Multifunctional Composites ◽  
Chemical Functionalization ◽  
Thermal And Electrical Properties ◽  
Strong Interfacial Bonding

Carbon nanotube is seen to be an excellent reinforcement candidate to produce multifunctional composites with improved mechanical, thermal and electrical properties. Strong interfacial bonding and homogenous dispersion are necessary conditions to obtain effective load transfer for mechanical enhancement. This paper addresses the processing of polymer composites reinforced by functionalized single wall carbon nanotubes. FTIR, SEM/EDX and DMA analysis are presented. The results demonstrated that the chemical functionalization of nanotubes helps to improve both dispersion and interaction in polymer matrix. Mechanical property improvement for the epoxy polymer composites has been shown with a small amount of carbon nanotube addition.

Interfacial load transfer in carbon nanotube/ceramic microfiber hybrid polymer composites

2012 ◽  
Vol 72 (12) ◽  
pp. 1416-1422 ◽  
Author(s):  
Noa Lachman ◽  
Erica Wiesel ◽  
Roberto Guzman de Villoria ◽  
Brian L. Wardle ◽  
H. Daniel Wagner
Keyword(s):  
Carbon Nanotube ◽  
Polymer Composites ◽  
Load Transfer ◽  
Hybrid Polymer
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