Enhanced gas barrier and mechanical properties in organoclay reinforced multi-layer poly(amide-imide) nanocomposite film

Gas barrier properties of polymer/clay nanocomposites

“…5,40 The incorporation of clay platelets into polymers initially attracted attention because of improvements in mechanical properties of polymer. 33,37,[56][57][58][59][60][61][62][63][64][65][66][67][68][69] The most widely used clay ller for the enhancement of gas barrier property of PNCs is MMT as it has large cation exchange capacity. 33,37,[56][57][58][59][60][61][62][63][64][65][66][67][68][69] The most widely used clay ller for the enhancement of gas barrier property of PNCs is MMT as it has large cation exchange capacity.…”

“…The stresses imposed during melt mixing break up aggregates and can shear the stack into smaller ones. 57 However, the solution intercalation method is limited to certain polymer/solvent pairs, in which the polymer is soluble and the silicate layers are swellable. 11 To melt-mix hydrophobic polymer matrix (e.g.…”

“…When a load of 2 wt% of MMT HDTMA/PVA was incorporated in the polymer matrix, the ow of CO 2 decreased by 43.7% compared to pure HDPE. 57 Nanocomposites made up of PVA, nanobrillated cellulose (NFC) and MMT clay were prepared by Spoljaric et al In addition, PVA matrices also crosslinked with poly(acrylic acid) (PAA) and compared with linear (noncrosslinked) PVA nanocomposites. Then LDPE/O-MMT nanocomposites was prepared by twinscrew extruder and hot-press.…”

Influence of Food with High Moisture Content on Oxygen Barrier Property of Polyvinyl Alcohol (PVA)/Vermiculite Nanocomposite Coated Multilayer Packaging Film

“…Inorganic particles such as clay minerals have attracted attention as a material that can overcome the disadvantages of plastic due to its excellent gas barrier properties with transparency as well as ability to enhance mechanical strength (Bergaya and Lagaly ; Brigatti and others ). To combine these advantages with plastic packaging materials, various polymer/clay nanocomposites have been studied and applied in the packaging industry (Ward and others ; de Azeredo ; Introzzi and others ; Priolo and others ; Priolo and others ; Sehaqui and others ; Gokhale and Lee ; Kim and Cha ; Yucel and others ; Cui and others ; Priolo and others ). Generally, polymer/clay nanocomposites can be formed using clays or organoclays in 2 ways, melt intercalation methods (Takahashi and others ; Paul and Robeson ; Cui and others ) and solution intercalation methods (Ray and Okamoto ; Cui and others ).…”

Chiral nanocomposites based on thermally stable poly(amide–imide) having S-valine groups and α-Fe2O3 nanoparticles

“…Poly(amide-imide) (PAI) contains both amide and heterocycle imide structures along the main chain of the polymer backbone and possesses high thermal stability, good chemical resistance, excellent mechanical properties, and hydrogen bonding interaction, being a promising matrix candidate for hybrid materials. [1][2][3] Synthesis of optically active polymers is an important field in polymer science owing to their potential applications in many fields such as biomedical devices, [4,5] liquid crystals, [6] nonlinear optics [7] and enantiomer separation and asymmetric catalysis. [8,9] This arises principally from their unique chiral structures that resemble those of naturally occurring materials (e.g.…”