Nacerddine Haddaoui

• Ph.D (1986) in Macromecular Science and Engineering CWRU Cleveland Ohio
• Research Director at Ferhat Abbas University of Setif-1

The chemical structure of low‐density polyethylene (PE), which is responsible for its incompatibility and durability, has a significant impact on the degradation process. The present study examined the effects of combining plasma treatment technology with the addition of a prooxidant (designated hereafter as Ox) into a PE matrix on the hydrophilici...

This work reports a comprehensive investigation into the synthesis, modeling, and characterization of multifunctional polyaniline/reduced graphene oxide (PANI/rGO) nanocomposites, with a focus on their synthesis using deep eutectic solvents (DES). Leveraging an in situ chemical polymerization method, PANI/rGO nanocomposites were successfully synthe...

This study employs various machine learning algorithms to model the electrical conductivity and gas sensing responses of polyaniline/graphene (PANI/Gr) nanocomposites based on a comprehensive dataset gathered from over 100 references. Artificial neural networks (ANNs) demonstrated superior predictive accuracy among the models. The investigation del...

This review presents a brief overview of the electrical and gas-sensor properties of polyaniline (PANI) and graphene-based nanocomposites with their application as gas detection materials along with underlying sensing mechanisms. Several studies have shown that graphene-based PANI gas sensors perform remarkably well at ambient temperature, energy e...

Recently, the applications in the automotive and packaging sectors have been developed for rubber-toughened Polypropylene (PP) nanocomposites with desired thermal and mechanical properties. In this work, PP/Nitrile butadiene rubber (PP/NBR) blends and nanocomposites containing graphene oxide (GO) and chemically functionalized GO with γ-glycidoxy pr...

This research investigates the effect of tetraethyl orthosilicate (TEOS) on the interaction mechanism in the hybrid polyvinyl alcohol (PVA)/graphene oxide (GO) material. PVA, PVA/Go, and PVA/Go-SiO2 are produced by the solution casting method. The TEOS-treated GO is confirmed by FTIR and also suggests that PVA is chemically bonded to GO-SiO2. XRD r...

Three different compatibilizers were used; namely: Fusabond (FSB) which is a maleic anhydride grafted polyethylene, montanic acid (E wax), and used engine oil (UEO) were incorporated into cellulose acetate/low density polyethylene (CA/LDPE) composites at three fiber contents: 5, 15 and 30 phr. Three series of samples consisting of treated composite...

Conducting polymeric composites have attracted great attention over the last years because of their potential uses in chemical, electronic and optical devices, and as catalysts as well as in adsorption processes. Chemical synthesis of polyaniline (PANI) and polyaniline-SiO 2 composite and their adsorptive performance were reported in the present wo...

Low density Polyethylene (designated hereafter as “PE”) is known for its inactivity, durability and resistance to degradation. For this reason adding pro-oxidants as additives in PE matrix could be efficient to elaborate a material designated as Ox-PE, exhibiting chemical reactivity. This modification could lead to an enhancement of compatibility b...

Composites, blends, and polymer membranes are all examples of processes that may benefit from response surface methodology (RSM) to optimize material characteristics. RSM is a convenient technique for determining the effect of several variables and their interactions on single or multiple response variables. The theoretical foundations and practica...

Developing new multifunctional eco-friendly materials that are also very effective is a significant challenge. Thus, multifunctional and innovative materials become more critical as modern electronics advance. Polyaniline/Graphene-based nanocomposite with good mechanical, dielectric, and electrical performances will be reported in this study by com...

The purpose of this study is to investigate the incorporation effect of kaolin clay on the mechanical and thermal properties of PP/kaolin composites. Its performance is studied as a function of powder content in the different particle size. To improve the dispersion of the mineral clay and the interfacial interactions between matrix and filler, mal...

Poly (vinyl chloride)/ montmorillonite nanocomposites were prepared using a melt mixing technique. For this purpose, three montmorillonite samples (MMT) namely, raw montmorillonite (R-MMT), sodium montmorillonite (Na ⁺ -MMT) and organically modified montmorillonite (O-MMT) were used with different contents (0, 1, 3, 5, 7 and 9 phr) in the presence...

In this study, the effect of graphene oxide (GO) on composites based on polypropylene (PP)/Natural Rubber (NR) was analyzed. Different contents of GO (1-3 vol.%) were added to PP/NR. In order to achieve better dispersion of the nanofiller and to enhance its interaction with the polymer matrix, maleic anhydride grafted polypropylene (PP-g-MAH) was u...

Conducting Polymeric composites have attracted great attention over the last years because of their potential uses in chemical, electronic and optical devices, and as catalysts as well as in adsorption processes. Chemical synthesis of polyaniline (PANI) and polyaniline-SiO 2 composite and their adsorptive performance were reported in the present wo...

In this work, a route is developed to synthesize nanocomposites based on polylactic acid (PLA) and stearic acid-modified TiO2 nanoparticles (TiO2-SA). The nanocomposite is prepared in two steps by solution and melt methods. Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), as well as T...

In the present study, several polypropylene/silica nanocomposites (PP/SiO2), containing 3 and 5 wt.% of untreated silica nanoparticles in presence of stearic acid (SA) as modifier agent, were prepared by melt mixing. Various analyses were used to characterize the dispersion and the properties of nanocomposites. Mechanical properties were found to i...

The compatibilization of raw bentonite (bent) with a polymer matrix of polypropylene (PP) can improve the performance of the material in terms of thermal and mechanical properties. In this study, two kinds of untreated bentonite, bentonite-Maghnia (bent-m) and bentonite-Mostaganem (bent-M), that differ in the proportion of Al2O3 and in the particle...

Eutectic solvents (ESs) have been extensively explored in polymer chemistry. Nevertheless, studies utilizing ESs as a constituent of biodegradable poly(diol-co-citrate) (PDCA) polyesters are lacking in the literature. In this work, we propose utilizing benzalkonium chloride (BAC) based hydrophobic eutectic solvents (HESs) as a constituent of PDCAs....

Nanocomposites of Polypropylene/Polyamide 66 (iPP/PA66) with a weight ratio of (70/30) filled with stearic acid-treated nanosized CaCO3 were melt compounded in the presence of a fixed amount of grafted polypropylene maleic anhydride (PP-g-MA) in a Brabender mixer. The purpose of this research is to obtain nanocomposites with high-performance struct...

Ternary biodegradable polymer blends of poly (lactic acid) (PLA), poly (butylene succinate) (PBS), and poly (ε‐caprolactone) (PCL) with the composition 45/10/45 wt% exhibit partial‐wetting morphology, where the minor phase is present as self‐assembled droplets at the co‐continuous interface of the other two major phases. In the article e10145, the...

Melt blending of homopolymers is an effective way to achieve an attractive combination of polymer properties. Dynamic vulcanization of fatty-acid-based polyester polyol with glycerol and poly(l-lactic acid) (PLLA) in the presence of hexamethylene diisocyanate (HDI) was performed with the aim of toughening PLLA. The dynamic vulcanization in an inter...

Ternary biodegradable polymer blends of poly(lactic acid) (PLA), poly(butylene succi-nate) (PBS), and poly(ε-caprolactone) (PCL) with the composition 45/10/45 wt% and exhibiting partial-wetting morphology were prepared. In this morphology, the minor phase is present as self-assembled droplets at the co-continuous interface of the other two major ph...

In this study, we present a new method of metal incorporation into polyaniline (PANI) nanostructures based on the use of palladium/tin colloidal solutions. This method allows controlling the size of metal particles inserted into the polymer matrix. The preparation of the PANI/Pd–Sn nanocomposites is done either with the in situ method by the additi...

Three semicrystalline polyesters, poly(lactic acid), poly(caprolactone) and poly(butylene succinate) (PLA, PCL and PBS) were melt blended to prepare binary and ternary systems of selected compositions. In binary blends with a sea-island morphology, each of the polymers is either the major or dispersed phase in the various samples. Analogously, diff...

The combination of poly(lactic acid) (PLA) with polycarbonate (PC) which presents high inherent thermal stability and mechanical properties is an attractive strategy to overcome PLA brittleness and poor thermal resistance. To improve affinity between the two materials and their dispersion into the blend, an organophilic montmorillonite (MMT) has be...

Three semicrystalline polyesters, poly(lactic acid), poly(caprolactone) and poly(butylene succinate) (PLA, PCL and PBS) were melt blended to prepare binary and ternary systems of selected compositions. In binary blends with a sea-island morphology, each of the polymers is either the major or dispersed phase in the various samples. Analogously, diff...

Binary deep eutectic solvents (DESs) were computationally (in-silico) designed by combining three quaternary ammonium salts, namely tetramethyl ammonium chloride (TMAC), choline chlorine (ChCl) and betaine as hydrogen-bond acceptors (HBAs) with sorbitol, glycerol, urea, ethylene glycol, glucose, acetic-acid, caffeic acid and 1,2-butanediol as hydro...

This work is based on the preparation of composites of poly(methylmethacrylate) with zinc oxide nanoparticles synthesized by solution casting method. Chloroform cast poly(methylmethacrylate) films containing different amounts of ZnO nanoparticles were characterized by XRD, SEM, UV-vis spectroscopy, FTIR spectroscopy and TGA. The results show that Z...

In this research work poly(vinyl chloride)(PVC), ethylene vinyl acetate copolymer (EVA), and Maghnite nanoclay (MGT) were used to prepare PVC/EVA nanocomposites. The MGT clay was intercalated with octadecyltrimethylammonium chloride (ODTMA) and grafted with γ-aminopropyltriethoxysilane (APTES). The blend nanocomposites were prepared through the mel...

The adsorption of four silanes, namely: N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane (AEAPTMS), 3-methacryloxypropyltrimethoxysilane (MPTMS), allyltrimethoxysilane (ATMS), N-2-[(N-vinylbenzylamino)ethyl]-3-aminopropyltrimethoxysilane hydrochloride (CVBS) onto the surface of silica nanoparticles has been studied using water/ethanol (5/95, v/v) mix...

In this study, the use of silane-crosslinking high density polyethylene/Spartium Junceum flour composites has been investigated. The silane grafting and composite production were carried out simultaneously in a one-step process using a mixing chamber of a Plastograph. Extraction in p-xylene revealed an increase in gel content with crosslinking. The...

In this study, polypropylene/silica (PP/SiO2) composites containing 5 wt% of untreated precipitated silica were compatibilized with different coupling agents like maleic anhydride-grafted polypropylene, glycerol monostearate (GMS), ethylene acrylic acid zinc ionomer and a second polymer phase of polyamide 6 (PA6). The composites were melt-compounde...

In this paper, nanohybrid materials were developed by the decoration of the support material, currently called graphene oxide (GO). These materials were further functionalized and decorated with sulfonic and silver, respectively. The functionalization process involves a covalent and non-covalent linking in which the chemical sulfonation and solvoth...

Zinc oxide nanoparticles (ZnO NPs) are prepared by sol–gel process, using both polyethylene glycol (PEG-400) as surfactant and propyltrimethoxysilane (PTMS) as capping agent. Surface modification is performed in situ procedure. The physical parameters such as strain and stress values are calculated via the Williamson–Hall plot (W&H) assuming a unif...

Biodegradable polymers are prime candidates for use in a variety of disposable materials because of their eco-friendliness; however, these polymers have some drawbacks that limit their use as individual polymers [1]. Poly(hydroxyalkanoate)s are biodegradable polymers that are naturally produced by bacteria. They can be processed to make a variety o...

Most of the bio-based polymers, such as polyesters and starch, have limited properties and required either to be chemically modified or to be mixed with other polymers to improve their weak properties, like mechanical properties, or further to reduce their sensitivity to moisture. Aliphatic polyesters have been of increasing interest because of the...

Samarium acetylacetonate (Sm-Acac) was added to catalyze interchange reactions between poly(lactic acid) (PLA) and polycarbonate (PC) in order to promote compatibilization and enhance the performances of the PLA/PC blend. The effects of the composition and catalyzed transesterification reactions were investigated using differential scanning calorim...

Bio-based blend nanocomposites of poly(L-lactic acid) (PLLA) and poly(butylene succinate) (PBS), with different concentrations (from 0.1 to 0.5 wt%) of graphene oxide (GO), are prepared via solution dispersion of PBS/GO followed by melt blending with PLLA in a 70/30 PLLA/PBS weight ratio. Scanning and Transmission Electron Microscopy reveals micron...

In this work, the effects of graphene oxide (GO) and its derivatives on the mechanical, thermal and morphological properties of TPE nanocomposites based on polypropylene/Nitrile-Butadiene-Rubber (PP/NBR) were investigated. In order to achieve a better dispersion of the filler and to enhance the coupling of the filler particles and the polymer matri...

Poly(lactic acid) (PLA)/polypropylene (PP) blends composites were prepared by incorporating 3 wt.% of copper modified montmorillonite (MMT-Cu²⁺), obtained using cation exchange in a CuSO4 solution, and 10 wt.% of polypropylene-graft-maleic anhydride (PP-g-MA) as a compatibilizer then varying the PLA content until 50 wt.%. These materials were subje...

In this study polypropylene/ethylene-propylene rubber (PP/EPR) and different amounts of partially reduced graphene oxide (prGO) and its derivatives were investigated. The nanocomposites were also compatibilized with EPR containing diethyl maleate (DEM), glycidyl methacrylate (GMA) and maleic anhydride (MAH) functionality as a means of controlling t...

In this work, the effect of graphene oxide (GO) and its derivatives on the mechanical, thermal and morphological properties of nanocomposites based on polypropylene/ethylene-propylene rubber (PP/EPR) were investigated. In order to achieve a better dispersion of the nanofiller and to enhance its interaction with the polymer matrix, amine and alcohol...

In recent years, authors are interested largely to the cation exchange method for modifying kaolinite clay using intercalation reaction. The purpose of this study is to do a comparison between kaolinite intercalates per formed with DMF and urea using guest displacement method in which new guest species "alkylammonium salts" can be intercalated betw...

In this study, the effects of free quenching on thermal, mechanical and morphological behaviors (properties) of blend-composites, namely polypropylene/polystyrene/calcium carbonate (PP/PS/CaCO3), polypropylene/polystyrene/ Kaolin (PP/PS/kaolin) and polypropylene/ polystyrene/silica (PP/PS/SiO2) have been investigated. Three different thermal treatm...

The effects of various compatibilizers on thermal, mechanical and morphological properties of 50/50 polypropylene/polystyrene blends were investigated. Various compatibilizers, polystyrene-(ethylene/butylenes/ styrene) (SEBS), ethylene vinyl acetate (EVA), polystyrene-butylene rubber (SBR) and blend of compatibilizers SEBS/PP-g-MAH, EVA/PP-g-MAH, a...

Poly(ethylene terephthalate) (PET)/polycarbonate (PC) blends were prepared in the presence and absence of samarium (III) acetylacetonate hydrate [Sm(acac)3] used as an ester-ester exchange reaction catalyst. Differential scanning calorimetry (DSC) and thermogravimetric analysis/differential thermogravimetry (TGA/DTG) were used to study the variatio...

The intercalation of kaolinite with an ammonium salt was performed. Untreated and treated kaolinite samples were examined by X-ray diffraction (XRD). PP/kaolinite compounds were prepared by the melt intercalation method. The effects of modified clay on properties of the prepared composites were studied. The XRD results showed that the treatment wit...

In this study, we want to investigate the effects of fibers content and surface modification of Spartium junceum (SJ) fibers on the water absorption characteristics, thermal degradation, and morphological properties of SJ-reinforced poly (vinyl chloride) (PVC) composites. In addition, the change in mechanical proprieties of the composites after bio...

Abstract The rheological properties and the viscoelastic behaviour of blends of polyethylene with different percentages of poly(lactic acid), ranging from 0 to 100 wt%, were studied. In a first part, all blends were examined under steady conditions using a capillary rheometer (at 180, 190 and 200 �C) and dynamic conditions using a parallel plate rhe...

Verres, Céramiques & Composites, Vol. 4, N°1 (2015), 15-19

This work deals with the effect of the quenching temperature on the mechanical and thermophysical properties of polycarbonate (PC) pigmented with titanium dioxide (TiO2). The thermal conductivity, thermal diffusivity, Izod impact strength and density measurements were measured. The thermal conductivity and diffusivity of the composites were measure...

In this study, the development of a mathematical model of the effects of free quenching on the Izod impact strength of polycarbonate (PC) has been investigated. Three different thermal treatments were used: the first quenching from the melt state to different temperatures, the second quenching from Tg + 15 °C and, finally, the annealing. The result...

Blends of isotactic polypropylene (iPP) and high density polyethylene (HDPE), with and without compatibilizers and with different organoclay amounts (1%, 3%, and 5%), were systematically investigated to assess the effect of the additives on the crystallinity of the blends, as well as the correlation between the microhardness, H and the Young's modu...

Triphenylphosphite (TPP) has been used as a chain extender to regenerate polyethylene terephtalate (PET) and high density polyethylene (HDPE) wastes and to improve the properties of PET/HDPE system based on recycled materials. TPP incorporation in PET and HDPE showed a noticeable increase of the torque as a function of the mixing time and proved th...

Abstract: In order to evaluate the biodegradability of blends of polyethylene and pol y (lactic acid), several formulations (LDPE/PLA) were subjected to the action of microorganisms containing in an activated sludge obtained from wastewater treatment plant. The biodegradability of the different mixtures was estimated by monitoring the variation of...

Polyaniline (PANI) nanostructures are successfully prepared and deposited by in-situ and drop-coating on glass substrates without using any template. By changing synthesis and deposition method, a new morphology of nanostructures, “the cauliflower-like structure”, is developed. These nanostructures were then tested as optical ammonia gas sensors by...

In this work, uncompatibilized and compatibilized blends of low density polyethylene (LDPE) and poly(lactic acid) (PLA) were subjected to several investigations: Fourier transform infrared (FTIR) spectroscopy, morphological analysis and mechanical testing (tensile, impact, microhardness). The copolymer (ethylene-coglycidyl methacrylate) (EGMA) was...

Vegetable flour (Spartium junceum) reinforced polymer composites provide the customers with more alternatives in the material market due to their unique advantages. The effects of Spartium junceum (SJ) flour content and coupling agent concentration on the composite properties were studied. The above samples were characterized by differential scanni...

In the present study, Spartium junceum (SJ) fibers were chemically treated with different concentrations of two coupling agents, silane N [-3 Trimethoxysilyl propyl] ethylene diamine (Z-6020) and stearic acid, in order to improve the mechanical properties of polypropylene/Spartium junceum fibers (PP/SJ) composites. The chemical modification efficie...

The effects of Spartium junceum (SJ) flour content, treatment time, and temperature on the mechanical and rheological properties of low density polyethylene/Spartium junceum flour (LDPE/SJ) composites were studied. SJ flour was treated with NaOH (5% wt) for 24, 48, and 72 h at 25°C and 40°C. FTIR results showed that there is a partial removal of li...

The ammonia absorption properties of polyaniline nanostructures are studied in terms of sensitivity, response and recovery times and stability. These characteristics are obtained by measuring, at room temperature, the absorbance variations at 632 nm. The nanostructures are synthesized either by interfacial or rapid or dropwise polymerizations with...

Composites of polypropylene filled with carbon black or acetylene black at different concentrations were prepared by melt mixing followed by compression molding. The influences of filler type and filler concentration on the composites conductivity were studied. It was found that the percolation threshold is located at a lower concentration in compo...

The effects of kaolin content and treatments on the thermal and mechanical properties and on the degradation of polypropylene were examined using mechanical tests, differential scanning calorimetry (DSC), and thermogravimetry (TGA). The weak interactions filler/matrix have been reinforced using a modification with urea then with an ammonium salt an...

The effect of free quenching on the mechanical, thermal, and thermophysical properties of polystyrene has been investigated. Three different thermal treatments were investigated: a first quenching from the melt state to different temperatures, a second quenching from 𝑇𝑔+7°C, and finally an annealing. The results have shown that a slight improvement...

In this article, calcium carbonate filled low density polyethylene (LDPE) was prepared and the influ-ence of filler content, particle size, and surface treatment with stearic acid on the strain hardening and viscoelastic properties of the composites were investigated. Both elon-gational and shear rheological measurements were con-ducted on the diff...

This paper presents the influence of Spartium junceum (SJ) fiber content, surface treatment and temperature on the water uptake of polypropylene/Spartium junceum fiber (PP/SJ) composites. Composites specimens were dried at 70°C to reach a constant weight and then were submerged in distilled water at different temperatures, 23°C and 85°C. Water upta...

The effect of different thermal treatments on the mechanical and thermal properties of polycarbonate was investigated. The first quenching procedure which involves the quench of the samples from the melt state to different temperatures allowed improving impact strength and elongation at break for a quenching temperature of 0°C. A second quenching p...

The effects of mixing conditions and transesterification catalyst concentration on the structural, thermal and morphological properties of a 50/50 polycarbonate (PC)/poly (ethylene terephthalate) (PET) system were investigated by differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and by solubility measurements. From the inc...

This study was performed in order to evaluate the effects of transesterification reactions on the thermal properties of the PC/PET system, as a function of homopolymer and exchange catalyst concentrations. DSC results support well that when transesterification occurs, the glass transition temperature of the PC-rich phase decreases with the increase...

The thermal and crystallization behavior of PP/Spartium junceum fiber composites were studied by thermogravimetry (TGA) and differential scanning calorimetry (DSC). The surface modification of Spartium junceum fibers was carried out using silane coupling agents in order to improve the interfacial adhesion between the fiber and the matrix. The effec...

This study deals with the chemical modification of calcium carbonate (CaCO3) by means of coupling agents and its effect on the mechanical, rheological, and thermal properties of the ternary composite of low density polyethylene (LDPE), calcium carbonate (CaCO3), and maleic anhydride-grafted low density polyethylene (MAH-g-LDPE).The variations in th...

BACKGROUND: A new processing method for polypropylene–untreated precipitated silica (PP/SiO2) composites based on the incorporation of a second polymer phase of polyamide 6 (PA6) is presented and compared with a more classic one making use of compatibilizers: glycerol monostearate (GMS), ethylene acrylic acid ionomer (IAAZE) and maleic anhydride gr...