Influence of fiber-like nanofillers on the rheological, mechanical, thermal and fire properties of polypropylene: An application to multifilament yarn

Vargas, A.; Orozco, Víctor H.; Rault, François; Giraud, Stéphane; Devaux, Éric; López, Betty L.

doi:10.1016/j.compositesa.2010.08.018

Cited by 41 publications

(27 citation statements)

References 44 publications

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“…This can be also managed with the adequate processing technique. The filler has to be dispersed homogenously in the polymer matrix because poor distribution can lead to agglomeration of the fillers in the matrix [4,5]. But the dispersion of inorganic particles in polymer matrix is often not easy possible.…”

Section: Introductionmentioning

confidence: 99%

Influence of processing conditions on the morphology of expanded perlite/polypropylene composites

Mattausch

Laske

Cirar

et al. 2014

AIP Conference Proceedings

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Perlite is an oversaturated, volcanic, glassy rock, which has chemically bound water from 2 to 5 wt%. Upon heating, perlite can be expanded up to 20 times of its original volume. Important applications are in the field of building industry, in refrigeration engineering or the pharmaceutical industry. As mineral filler in polymers, expanded perlite can increase the thermal conductivity, the viscosity and the mechanical properties of polypropylene composites. But there are still many challenges that must be analyzed to reach the full potential of those composites. This research work focuses on the morphology of expanded perlite/polypropylene (PP) compounds and the interactions between filler and polymer. To achieve good performance a homogenous dispersion of the filler in the polymer matrix is needed because the enhancement of the material correlates strongly with the morphology of the composite. Therefore it is necessary to characterize the microstructure of these materials in order to establish adequate structure-process-property relationships. The expanded perlite/PP composites were compounded with a corotating twin screw extruder Theysohn TSK 30/40D. For producing the closed cell expanded perlite a new technology, the bublon process, was used. For the material characterization two particles sizes were chosen and the filler content was varied at 5, 10 and 15 wt%. For the analysis of the effects of the screw geometry, two setups have been chosen for the processing of the materials. The produced materials were analyzed by scanning electron microscope (SEM) and tensile testing. The results show a reinforcement effect of the filler and differences in the inner structure of expanded perlite and in the morphology.

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Section: Introductionmentioning

confidence: 99%

Influence of processing conditions on the morphology of expanded perlite/polypropylene composites

Mattausch

Laske

Cirar

et al. 2014

AIP Conference Proceedings

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“…The introduction of an inorganic phase in a hydrogel matrix determines enhanced mechanical proprieties. The increased value of G' can be explained by the good distribution of NP-NH 2 that leads to the formation of an ordinate structure, which is reflected in the increased value of the elastic modulus [31,32]. Instead, the loss modulus shows no significant difference between the samples, it means that their viscosity is almost the same.…”

Section: Hybrid Hydrogel (Cmc-np) Synthesismentioning

confidence: 95%

Hybrid Magnetic Hydrogel: A Potential System for Controlled Drug Delivery by Means of Alternating Magnetic Fields

Giani¹,

Fedi²,

Barbucci³

2012

Polymers

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Abstract:Novel hybrid magnetic hydrogels have demonstrated their influence in several areas, particularly in biomedical science where these innovative materials are showing interesting applications for controlled drug delivery. A hybrid hydrogel with CoFe 2 O 4 nanoparticles (NPs) as cross-linker agents of carboxymethylcellulose (CMC) polymer was obtained with the aim of testing it as a system for controlled drug release. The NPs were functionalized with (3-aminopropyl)-trimethoxysilane (APTMS) in order to introduce-NH 2 groups on the surface. Infrared spectroscopy, XPS and electrochemical analysis were performed to quantify the amino coating. The presence of magnetic nanoparticles makes the system suitable for an application with magnetic stimulus. Preliminary studies performed with alternating magnetic fields indicate a release of the drug-like molecules previously loaded in the matrix.

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“…At a high frequency, which is related to polymer chain movement at a small time scale, there are no marked differences among the samples, and therefore, the addition of the filler does not affect the chain movement. Previous studies have shown that slow changes in G' at low frequencies are related to a solid-like behavior due to the structuration of the filler into the polymer matrix [19]. Apart from the treatments, the addition of PE-g-MA as a compatibilizer lowered G' and G" in the composites (Figures 2(c) and 2(d)), as PE-g-MA leads to the creation of a thin and irregular polymer layer, which assists in the formation of a plastic deformation zone around the fiber [26].…”

Section: Rheological Analysismentioning

confidence: 99%

“…Hydroxyl and other polar groups located in the branched heteropolysaccharides present in the kenaf fiber (KF) and in the active sites of the water absorption results in an incompatibility with the hydrophobic HDPE matrix which in turn leads to poor composite properties. To reduce the surface hydrophilicity, the surface of the fiber is coated with MA groups that can form an ester linkage [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fiber Loading and Compatibilizer on Rheological, Mechanical and Morphological Behaviors

Noranizan¹,

Ahmad²

2012

OJPChem

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This study presents the composites prepared by melt blending based on high-density polyethylene, containing various amounts of kenaf fiber loadings and polyethylene-grafted maleic anhydride (PE-g-MA) in an internal mixer were prepared and investigated. Fourier transform infrared spectroscopy was used to characterize both untreated and treated kenaf fibers. A rheological study of the composites showed a high complex viscosity and dynamic shear storage modulus between untreated and treated composites and composites with compatibilizer. A mechanical test showed that the tensile strength and tensile modulus were optimal with 20% fiber loading but decreased with 30% fiber loading for both the untreated and treated composites. The composite with PE-g-MA showed an improved mechanical strength. This phenomenon is due to an increase in the interfacial adhesion between the fiber and matrix leading to an improvement in the compatibility of the blend. Treatment of the kenaf fiber improved in the mechanical and impact strengths in comparison to the untreated kenaf composites. This behavior was supported by a morphology analysis of the fractured surfaces revealed that strong interfaces were formed on addition of the compatibilizer.

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Influence of fiber-like nanofillers on the rheological, mechanical, thermal and fire properties of polypropylene: An application to multifilament yarn

Cited by 41 publications

References 44 publications

Influence of processing conditions on the morphology of expanded perlite/polypropylene composites

Influence of processing conditions on the morphology of expanded perlite/polypropylene composites

Hybrid Magnetic Hydrogel: A Potential System for Controlled Drug Delivery by Means of Alternating Magnetic Fields

Effect of Fiber Loading and Compatibilizer on Rheological, Mechanical and Morphological Behaviors

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