Investigation of the rheological, dynamic mechanical, and tensile properties of single‐walled carbon nanotubes reinforced poly(vinyl chloride)

Abstract

Polymer nanocomposites consisting of single-walled carbon nanotubes (SWCNTs) and poly(vinyl chloride) were prepared by casting technique. The complex viscosity increased with increasing SWCNTs content, and it had a percolation concentration threshold equal to 0.45 wt % of SWCNTs. The storage modulus, G 0 , increased with increasing either SWCNTs content or frequency. A gradual decrease in the terminal zone slope of G 0 for the nanocomposites with increasing SWCNTs content may be explained by the fact that the nanotube-nanotube interactions will be dominant at higher CNTs content, and lead to the formation of the interconnected or network-like structures of SWCNTs in the polymer nanocomposites. The rheological loss factor indicates two relaxation peaks at frequencies of 0.11 and 12.8 Hz due to the interaction between SWCNTs and polymer chains and glass transition, respectively. Dynamic mechanical properties were measured for the prepared composites. The results indicate that the storage modulus changes steadily, and the tand peaks are less intense for high SWCNTs content. Tensile tests were measured and depicted by an increase in the elastic modulus with increasing SWCNTs content, but it decreases for all composites as the testing temperature increased.

Multifunctionalized Carbon Nanotubes Polymer Composites: Properties and Applications

“…In this respect, the melt-mixing method is the preferred method of fabricating CNT-filled polyvinyl chloride (Farsheh et al 2011;Aljaafari et al 2012). The MWCNT-filled polyvinyl chloride mixed matrix membrane is suitable for gas separation applications, as well as an indicator electrode in potentiometric titrations (Abu-Abdeen 2012). In addition, it was determined that the dispersion of CNTs and morphology changes from CNT breakages are closely related to the electrical conductivity of the composites (Suemori et al 2013).…”

Electrical and optical properties of well-dispersed MWCNTs/PVA nanocomposites under different pH conditions

“…Besides, commercial thermoplastic polymer such as polyethylene (PE), polypropylene (PP), poly (vinyl alcohol) ( PVA), polyvinyl chloride (PVC) ….etc are the mostly and widely used plastic in the industrial applications because they are cheap, durable, hard, and easily worked. 1 –20 Despite of the extensive studies 1 –27 of such materials, multiwalled carbon nanotubes (MWCNTs)-polymer nanocomposites, many important aspects of the electronic and optical properties of these materials are still not fully resolved. Consequently, it will be very interesting to study the effect of pretreatment of MWCNTs using a new method to improve their dispersion in neat polymer to obtain polymer nanocomposites that have attractive properties for industrial applications.…”

“…Researcher’s community has devoted a large amount of efforts and times into the synthesis of MWCNTs-polymer nanocomposites with different techniques. 5 –25 Data from the literature reveal that the dispersion of MWCNTs in polymers and particularly PVA matrix can be enhanced by functionalizing MWCNTs using acid treatment (wet chemical method), dry oxidation such as the use of ozone in the presence of ultraviolet (O 3 /UV) or simply by the addition of additives. In addition to this, sonication and other physical mixing methods have been reported to enhance the dispersion of MWCNTs in polymer matrix.…”

“…The dispersion of MWCNTs in the matrix contributes a pivotal role in the electrical and other physical properties of the resultant thin films. 1,15 –25…”

Chiral Poly(Amide-Imide)/Carbon Nanotube Bionanocomposites Containing Hydroxyl Pendant Groups and L-Phenylalanine Amino Acid: Synthesis, Preparation of Thin Films, and Thermomechanical Behavior

“…Mechanically, the Young's modulus and ultimate tensile strength of single-walled CNTs (SWCNT)s have been measured to be approximately E ≈ 1,054 GPa and σ f ≈ 75 GPa, respectively, and for multi-walled CNTs (MWCNT)s E ≈ 1,200 GPa and σ f ≈ 150 GPa, respectively (7). The effects of CNT addition on the thermal, mechanical, and electrical properties have been investigated for various kinds of thermoplastic polymers such as polypropylene (15), polystyrene (16), polymethyl methacrylate (17), poly(aryl ether ketone) (18), polyesters (19), polyimide (20), nylon 46 (21), poly(vinyl chloride) (22), and the increases in strength, elastic modulus, and electrical conductivity have been found. Email: mallak@cc.iut.ac.ir; mallakpour84@ alumni.ufl.edu; or mallak777@yahoo.com composite reinforcements, actuators, nanopipes, chemical sensors, nano-reactors, and so forth.…”