Thermal and corrosion (in)stability of polyamide 6 studied by broadband dielectric spectroscopy

Effect of moisture and filler content on the structural, thermal and dielectric properties of polyamide‐6/boehmite alumina nanocomposites

“…Notably, PA‐6 was the polymer matrix of the first successfully manufactured nanocomposite, and it is still one of the preferred matrices for organic fillers and clay minerals . It is also well established that the nature of PA‐6 is hydrophilic due to the presence of amide groups in the polymer chain …”

“…Moreover, polyamide has a tendency for moisture absorption due to the presence of amide groups in the polymer chain . According to the two‐step absorption model (Puffr and Šebenda, extended by Starkweather and Barkley), intercalated water molecules form hydrogen bonds with the NH groups, replacing the intermolecular amide–amide bonds (Fig.…”

“…Furthermore, the BDS response is also strongly affected by the semicrystalline nature of PA‐6, as well as by the presence of moisture causing plasticization . Thus, this rich complexity allows different approaches for the interpretation of the dielectric relaxation mechanisms . To that end, it is well demonstrated that in the case of nanocomposites the incorporation of nanofillers in a polymer matrix can yield specific dynamic effects, the analysis of which may eliminate possible ambiguities with respect to the interpretation of relaxation mechanisms …”

Nanocomposite based on polystyrene/polyamide blend and bentonite

“…However, good macroscopic properties require high exfoliation degree of clay particles, which in turn depend on processing conditions, molecular weight of PA, and backbone polarity. 14,15 Aliphatic-aromatic PAs are important engineering materials having extensive industrial applications due to excellent properties such as toughness, high modulus, and abrasion resistance. [16][17][18] It is customary to characterize the dispersion level of nanoclay layers using various techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy, atomic force microscopy, rheological measurements, and nuclear magnetic resonance.…”

Erratum to “Novel Facial Conducting Polyamide-Based Dithiophenylidene Cyclyhexanone Moiety Utilized for Selective Cu2+ Sensing”

“…[8,9] There are two main types of these polymers; the first type is linear polyamides which have aromatic and/or heteroaromatic units together with amide groups in the polymer backbone. [10,11] The second type is branched polyamides which carry aromatic and/or heteroaromatic as pendent groups across the main chain. [12][13][14][15][16][17] Several attempts have been done to overcome such deficiency and producing processable materials while safeguarding their favorable properties, which mainly depending on the structural design in the polymer main chains.…”