Synthesis and studies of thermal, mechanical and electrical properties of MWCNT-cyclodextrin as a nanoparticle in polyamide matrix based on 2,2-Bis[4-(4-aminophenoxy)phenyl] propane

Abstract

In the present research, polyamide (PA) (6) was synthesized by the polycondensation reaction of 2,2-Bis[4-(4-aminophenoxy)phenyl] propane as a diamine (4) with adipic acid (5) in the optimized condition. The resulting PA was characterized using Fourier transform infrared spectroscopy, Proton Nuclear Magnetic Resonance ( 1 H NMR) spectroscopy, inherent viscosity (η inh ), X-ray diffraction, and solubility tests. Also, the thermal property of the new PA (6) was investigated by using Thermogravimetric analysis. To apply multiwall carbon nanotube (MWCNT) as an effective reinforcement in polymer composites, it is essential to have appropriate proper dispersion, interfacial adhesion between the MWCNT and polymer matrix, and increasing solubility. With this end particularly, functionalized MWCNTs were combined with a soluble molecule, and a series of modified MWCNT with cyclodextrin (Cy) known as PA/MWCNT-Cy composite film (2, 5, and 8 wt%) were prepared by a solution intercalation technique. Field emission scanning electron microscopy images showed that MWCNT-Cy was well dispersed in the PA matrix. Thermogravimetric analysis indicated an increase in thermal stability of nanocomposites as compared with the pristine PA. Anisotropic structure of the synthesized films and dispersed MWCNT-Cy in the films approved by use of X-ray diffraction and field emission scanning electron microscopy. The resultant PA/MWCNT-Cy composite films were electrically conductive, which is favorable for many practical uses. Measurements of mechanical properties of these composite films showed high strength in 8% MWCNT-Cy content. Also, results showed increases in Young's modulus and tensile strength. Copyright

Investigating properties of poly (ether‐amide)/MWCNT nanocomposite films containing 2,7‐bis(4‐aminophenoxy)naphthalene and isophthalic segments

“…Mechanical tests were carried out with speed of 5 mm min −1 , and the specimens are dumbbell shape (20 × 2 × 0.18 mm 3 ). The average data for yield strength, modulus, and strain were calculated through 3 times measurement . The area under the stress‐strain isotherm curve was used to determine volumetric fracture energy, ie, the energy or work required for rupture, which was equal to the toughness of the films.…”

Role of π‐π interactions and chain flexibility in dispersion and dynamic‐mechanical properties of nanocomposites with multiple wall carbon nanotubes

“…Among the most important aspects that could maximize the nanoparticles effective performance in altering polymeric materials properties are the nanoparticle dispersion homogeneity and its wettability by the polymer matrix . These factors are essential for the interfacial adhesion between CNT and the polymer matrix and play a fundamental role in nanocomposite performance.…”

Effect of different ionic layered compounds decorated with zinc hydroxystannate on flame retardancy and smoke performance of epoxy resin

“…Polymer materials are increasingly used in daily life and industrial and agricultural production. However, ordinary polymer materials are generally prone to burning and will release a lot of toxic and harmful fumes when burned, which is a hazard to the safety of people's lives and property. Adding a high‐efficiency flame retardant to a polymer is a simple method for reducing flammability of polymer materials.…”