Fabrication of Nylon 6-Montmorillonite Clay Nanocomposites with Enhanced Structural and Mechanical Properties by Solution Compounding

Abstract

Melt compounding has been favored by researchers for producing nylon 6/montmorillonite clay nanocomposites. It was reported that high compatibility between the clay and the nylon6 matrix is essential for producing exfoliated and well-dispersed clay particles within the nylon6 matrix. Though solution compounding represents an alternative preparation method, reported research for its use for the preparation of nylon 6/montmorillonite clay is limited. In the present work, solution compounding was used to prepare nylon6/montmorillonite clays and was found to produce exfoliated nylon 6/montmorillonite nanocomposites, for both organically modified clays with known compatibility with nylon 6 (Cloisite 30B) and clays with low/no compatibility with nylon 6 (Cloisite 15A and Na+-MMT), though to a lower extent. Additionally, solution compounding was found to produce the more stable α crystal structure for both blank nylon6 and nylon6/montmorillonite clays. The process was found to enhance the matrix crystallinity of blank nylon6 samples from 36 to 58%. The resulting composites were found to possess comparable mechanical properties to similar composites produced by melt blending.

Enhancing the Properties of Water-Soluble Copolymer Nanocomposites by Controlling the Layer Silicate Load and Exfoliated Nanolayers Adsorbed on Polymer Chains

“…The chemical structure of β-CD-AOI 2 was identified from the FTIR spectra of β-CD and β-CD-AOI 2 . As shown in Figure 4 I, the new characteristic IR bands at 1705 and 1595 cm −1 , which are absent in the spectrum of β-CD, correspond to the stretching vibrations of secondary amides, thereby confirming the successful grafting of AOI onto β-CD [ 8 ].…”

“…In recent years, water-soluble polymer nanocomposites are increasingly being used in EOR [ 4 , 5 , 6 , 7 ]. Montmorillonite (MMt) is a common inorganic phase in the synthesis of water-soluble polymer nanocomposites, and its nano-effects have received considerable research attention [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. MMt is a natural two-dimensional layered silicate material whose crystal structure is composed of two sheets of silicon–oxygen tetrahedra sandwiched between sheets of aluminum–oxygen octahedra [ 18 , 19 , 20 ].…”

Robust polyamide 66 composites with hybrid fillers for thermal management and electromagnetic shielding

“…It may be that the distance between hydrogen bonded chains becomes larger due to the introduction of filler, and the d ‐spacings corresponding to the α 1 (100) peak were slightly widened, but the actions were not strong enough to change the crystalline structure of PA66. [ 43,44 ] The very sharp MCMBs (002) plane is observed in PA66/MCMB composites and PA66/MCMB/CF composites, which indicates that the interlayer spacing of MCMBs graphite layers were not affected during the melting blending process. The XRD pattern of the PA66/CF composites is shown in Figure 2D, which shows a conspicuous diffraction peak at about 24.7° is C phase, corresponding to the (002) crystal face of PAN‐based CFs, [ 45 ] which is related to the stack thickness of carbon layer along the c axis ( L c ).…”

Ring Opening Polymerization Used for the Production of VOC Free High-Performance Ecofriendly Novel PBZ/PDA/CeO2 Nanocomposites

“…The active and homogeneous distribution of NPs is quite an impenetrable topic for scientists, which is importantly prejudiced by the intra-particle connections. Therefore, surface modifiers have been used to prevent this problem, placing them in a layer around the nanoparticle [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ].…”