Investigation of Polypropylene-Montmorillonite Clay Nanocomposite Films Containing a Pro-degradant Additive

Yussuf, Abdirahman Ali; Al‐Saleh, Mohammad A.; Al-Samhan, Meshal; Al-Enezi, Salah; Al-Banna, A.; Abraham, Gils

doi:10.1007/s10924-017-0946-0

Cited by 22 publications

(25 citation statements)

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“…This effect was reversible without any deterioration of the oxygen barrier property. Yussuf et al [171] developed a biodegradable packaging film using PP/MMT nanoclays with a pro-degradant additive. The advanced film delivered a high oxo-biodegradation rate and increasing MMT content (one to three parts per hundred), and improved the mechanical and thermal properties of the film, but was detrimental to the degradation process.…”

Section: Food Packagingmentioning

confidence: 99%

A Review of the Synthesis and Applications of Polymer–Nanoclay Composites

et al. 2018

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Recent advancements in material technologies have promoted the development of various preparation strategies and applications of novel polymer–nanoclay composites. Innovative synthesis pathways have resulted in novel polymer–nanoclay composites with improved properties, which have been successfully incorporated in diverse fields such as aerospace, automobile, construction, petroleum, biomedical and wastewater treatment. These composites are recognized as promising advanced materials due to their superior properties, such as enhanced density, strength, relatively large surface areas, high elastic modulus, flame retardancy, and thermomechanical/optoelectronic/magnetic properties. The primary focus of this review is to deliver an up-to-date overview of polymer–nanoclay composites along with their synthesis routes and applications. The discussion highlights potential future directions for this emerging field of research.

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Section: Food Packagingmentioning

confidence: 99%

A Review of the Synthesis and Applications of Polymer–Nanoclay Composites

et al. 2018

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“…[40] Synthesis of PPy: In a 100 mL round-bottom flask, FeCl 3 (0.649 g, 4 mmol) was dissolved in 20 mL MilliQ water and stirred for 2 h. The flask was placed in an ice bath and then pyrrole (0.138 mL, 2 mmol) was dropped slowly to the solution of oxidant in 1:2 molar ratios and kept for 24 h. Finally, the suspension was filtered and washed with distilled water, acetone, and ethanol to remove oligomers and rest of catalyst. PPy as black powder was obtained after drying at 90 °C in the vacuum oven for 48 h. [41] Synthesis of the Polyrotaxane 3: The polyrotaxane 3 was synthesized as follows: In a 100 mL round-bottom flask, PEGBA (1) (0.1 g, 2.27 mmol ethylene glycol units) and RAMEB (1.5 g, 1.13 mmol), (molar ratio 1:2 = RAMEB/ethylene glycol units), were dissolved in 4 mL MilliQ water. The resulting solution was sonicated for 30 min followed by stirring at ambient temperature for 24 h, and then kept for 10 h in a refrigerator to obtain a viscous solution.…”

Section: Methodsmentioning

confidence: 99%

“…In a 100 mL round‐bottom flask, FeCl 3 (0.649 g, 4 mmol) was dissolved in 20 mL MilliQ water and stirred for 2 h. The flask was placed in an ice bath and then pyrrole (0.138 mL, 2 mmol) was dropped slowly to the solution of oxidant in 1:2 molar ratios and kept for 24 h. Finally, the suspension was filtered and washed with distilled water, acetone, and ethanol to remove oligomers and rest of catalyst. PPy as black powder was obtained after drying at 90 °C in the vacuum oven for 48 h. [ 41 ]…”

Section: Methodsmentioning

confidence: 99%

Morphological and Electronic Properties of Poly(ethylene glycol)/RAMEB Polyrotaxane and Polypyrrole Supramolecular Networks

Resmeriță¹,

Asăndulesa²,

Farcas³

2020

Macro Chemistry & Physics

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well their mechanical properties. The crosslinked polyrotaxanes are characterized by high mobility of the junctions, which considerably diminished the internal tension when a stimulus is applied, providing the enhancements of mechanical properties. [6][7][8][9][10][11] The blending of the CPs into the matrix, in one step reaction, leads to a more homogeneous network compounds. Recently, our efforts are being made in this directions and a versatile synthetic strategy was applied for the synthesis of such supramolecular networks by cross-linking of an insulated polyrotaxane with π-conjugated polyrotaxanes. [12] Due to controllable electrical conductivity and good thermal stability of polypyrrole (PPy), this approach has also been applied to the synthesis of composite materials based on PEGBA polyrotaxane with randomly methylated β-cyclodextrins (RAMEB). [13][14][15] Herein, we report the synthesis and characterization of a new composite material obtained by cross-linking of PEGBA/RAMEB polyrotaxane with 1,6-hexamethylene diisocyanate (HMDI). The addition of 10 wt% PPy into the PEGBA/RAMEB matrix showed improved physical, morphological as well electrical properties of the resulted cross-linked material. Moreover, the influences of the temperature and frequency on the electrical properties of the investigated PEGBA/RAMEB/PPy compound were investigated and compared with those of the pure PEGBA/RAMEB crosslinked material.The effect of 10 wt% polypyrrole (PPy) incorporation on the evolution of conductivity, dielectric constant, and dielectric loss by varying the temperature and frequency of amine-terminated poly(ethylene glycol)/randomly methylated β-cyclodextrins (PEGBA/RAMEB) polyrotaxane cross-linked with 1,6-hexamethylene diisocyanate is reported. This composite material shows an enhanced dielectric constant value of 25.6 (at 10 Hz) compared with 8.3 of the pure cross-linked PEGBA/RAMEB polyrotaxane. The values of the dielectric constant are consistent with the dielectric loss and conductivity results. The composite material shows that the direct current conductivity (σ DC ) at lower temperature is independent of frequency. In comparison, at higher temperature, σ DC is dependent on frequency, denoting that the conductivity of the composite material is a thermally activated process. Moreover, the presence of PPy significantly influences the morphology of the cross-linked PEGBA/RAMEB polyrotaxane. Addition of PPy into PEGBA/RAMEB material seems to be very attractive and should provide an opportunity to obtain desirable electronic properties.

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“…All three samples exhibit peaks at 2000 cm À1 (C]C stretch) and 2100 cm À1 (C-H stretch) of the PPy ring. 52,55 Finally, a broad peak centered at 3400 cm À1 is attributed to N-H stretches. 53…”

Section: Spectroscopic Characterizationmentioning

confidence: 99%