Journal ArticleDOI
Rheological properties and thermal stability of compatibilized polypropylene/untreated silica composites prepared by water injection extrusion process
TLDR
In this paper, polypropylene/silica (PP/SiO2) composites containing 5% of untreated precipitated silica were compatibilized with different coupling agents like maleic anhydride-grafted polyethylene, glycerol monostearate (GMS), ethylene acrylic acid zinc ionomer and a second polymer phase of polyamide 6 (PA6).Abstract:
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-compounded by two different processes: either by direct melt mixing or by dilution of a masterbatch (two-step mixing) in a twin screw extruder using both injected water and high shear stress as a new processing method. The various samples were characterized by Fourier transform infrared spectroscopy (FTIR), thermal analysis, morphological and rheological measurements in order to determine the compatibilizers effects between the matrix and the untreated filler. Hence, atomic force microscopy observations revealed that the untreated silica was dispersed more homogeneously in the presence of PA6 and GMS compatibilizers when water injection is used as one. However, the roughness values are lower in this case. FTIR analysis confirmed the existence of interfacial interactions between OH groups of SiO2 and polar groups of compatibilizers. The storage (G′), loss moduli (G″) and the dynamic viscosity of PP/SiO2 composites increased with the incorporation of PA6. Furthermore, the thermal stability of the compatibilized PP/SiO2 compounds enhanced significantly in the presence of water. An improvement in decomposition temperature of about 50 °C was obtained compared to uncoupled composites.read more
Citations
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Investigation of structure and rheological behavior of a new epoxy polymer pentaglycidyl ether pentabisphenol A of phosphorus and of its composite with natural phosphate
Rachid Hsissou,Omar Dagdag,Mohamed Berradi,Mehdi El Bouchti,M. Assouag,Abderrahim El Bachiri,Ahmed Elharfi +6 more
TL;DR: In this paper, a pentafunctional epoxy resin based on pentaglycidyl ether pentabisphenol A of phosphorus (PGEPBAP) has been synthesized and characterized through different spectroscopic methods (FTIR, 1H NMR, 13C NMR and 31P NMR).
Journal ArticleDOI
Dynamically Cross-Linked Tannin as a Reinforcement of Polypropylene and UV Protection Properties.
TL;DR: The experimental results indicated that the cross-linked tannins improve Young’s modulus, crystallinity, and thermal stability and reinforce the internal network of polypropylene.
Journal ArticleDOI
One-step compatibilization of poly(lactic acid) and tannin via reactive extrusion
Jingjing Liao,Jingjing Liao,Nicolas Brosse,Sandrine Hoppe,Guanben Du,Xiaojian Zhou,Antonio Pizzi +6 more
TL;DR: In this paper, the compatibility issue between poly(lactic acid) (PLA) and tannin is addressed using an efficient one-step reactive extrusion method with the help of methylene diphenyl diisocyanate (p-MDI) or 3-aminopropytriethoxysilane (APS).
Journal ArticleDOI
Polypropylene Blend with Polyphenols through Dynamic Vulcanization: Mechanical, Rheological, Crystalline, Thermal, and UV Protective Property
TL;DR: According to the experimental results, tannin and lignin undergo dynamic vulcanization and were more compatible with the PP matrix and present better UV protective performance, concluded from fewer changes on surface morphology, carbonyl index, crystallinity, viscosity, and tensile property.
Journal ArticleDOI
Synthesis rheological and thermal studies of epoxy polymer and its composite
Naoual El-Aouni,Rachid Hsissou,Rachid Hsissou,Jalila El Azzaoui,Mehdi El Bouchti,Ahmed Elharfi +5 more
TL;DR: In this paper, an epoxy polymer namely tetraglycidyl ether dianiline dipropoxy diphenyl sulfone (TGEDADPDS) was investigated and synthesized by polycondensation reaction.
References
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TL;DR: A review of the academic and industrial aspects of the preparation, characterization, materials properties, crystallization behavior, melt rheology, and processing of polymer/layered silicate nanocomposites is given in this article.
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Rheology of Polypropylene/Clay Hybrid Materials
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TL;DR: The melt-state linear and nonlinear shear rheological properties of hybrid materials of polypropylene and amine-exchanged montmorillonite were studied in this article.
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Rubber–filler interactions and rheological properties in filled compounds
TL;DR: In this article, the authors discuss the nature of rubber-filler interactions and their effects on rheological properties of uncured materials and discuss the relationship between bound rubber and flow properties.
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A rheological study on the kinetics of hybrid formation in polypropylene nanocomposites
TL;DR: In this article, the authors present an experimental investigation on the creep behavior of molten polypropylene organically modified clay nanocomposites, which were prepared by melt intercalation in an extruder in the presence or absence of a compatibilizer.
Journal ArticleDOI
Structure–property relationships of irradiation grafted nano-inorganic particle filled polypropylene composites
TL;DR: In this article, an irradiation grafting method was applied for the modification of nanoparticles so that the latter can be added to polymeric materials for improving their mechanical performance, using existing compounding techniques.