Bionanocomposites poly(ϵ-caprolactone)/organomodified Moroccan beidellite clay prepared byin situring opening polymerization: Characterizations and properties

The relationship of structure, thermal and water vapor permeability barrier properties of poly(butylene succinate)/organomodified beidellite clay bionanocomposites prepared by in situ polycondensation

“…48,62 On the other hand, at high nanoclay content (5% 3CTA-BDT) the viscosity of the reaction medium becomes quite high even at the reaction temperature of 220 C, and the lower molecular mass might thus be related to the diffusion-controlled termination of the polymerization reaction. 48,49 Katiyar et al, reported similar results corresponding to the synthesis of poly(L-lactic acid)/clay nanocomposites. 63 The X-ray diffraction and scanning electron microscopy (SEM) were used to quantify and qualify the dispersion of silicate layers in the polymer matrix as well as the intercalation of polymer chains into the silicate galleries and the phase structure.…”

“…68 Indeed, the high residual weight (char%) of the nanocomposites compared to the pure PBS mainly comes from the inorganic part of 3CTA-BDT organoclay. 49 The slight decrease of the T d (5%) for the nanocomposite with higher organoclay content (5 wt%), may be attributed to a less efficient barrier caused by the poorer quality of organoclay dispersion, and possibly to a further contribution related to the lower molar mass of extracted PBS ( M n ¼ 5400 g mol À1 , Table 1). 48 3.2.2.…”

“…[45][46][47] Recently, in situ polymerization technique was used to prepare bionanocomposites poly(butylene adipate) and poly(3-caprolactone) in the presence of organomodied BDT. 48,49 In the present work, PBS was prepared by one step in situ polycondensation between 1,4-butanediol and succinic anhydride in reuxing decalin as solvent in the presence of orga-nomodied beidellite clay (BDT). Bismuth chloride, BiCl 3 , was used as a non-toxic polymerization catalyst in contrast to highly toxic dibutyltin compound which generally used for this reaction.…”

Preparation and characterization of PCL‐grafted zein film via atmospheric‐pressure cold plasma pretreatment

“…Also, the PCL showed a sharp and narrow endothermic peak at 60.62°C, which was assigned to the melting temperature (T m ) of PCL, in agreement with the previously reported temperature range of 57-63°C. [30,31] After grafting with PCL, the raw composite film showed a broad endothermic peak including major peak 2 (83.10°C) and a small peak 1 (58.46°C) with a small enthalpy value (0.15 J•g −1 ), assigned to the denaturation of zein and melting of PCL-coated layer, respectively (Figure 4c). After plasma pretreatment, peak 1 of the ZPA curve (Figure 4d) became the most intense with increased melting enthalpy (1.44 J•g −1 ), suggesting that a more PCLcoated layer was formed on the zein film during grafting.…”

Fabrication of Poly(ε-caprolactone)-Based Biodegradable Packaging Materials with High Water Vapor Barrier Property

“…The increase in hydrophobicity led to the decrease of the solubility and diffusion coefficients, which is the key to the improvement of water vapor barrier properties. Figure and Table S4 compare the relative permeability changes of PCL/C18 and PCL/other filler (PH, C–Ca/Al–D, PPC, SE, Gr, C15A, organically modified montmorillonite (OMMT), and clay) composites. It is observed that PCL/C18 composites have the most excellent water vapor barrier properties.…”