Effect of talc content on the degradation of re-extruded polypropylene/talc composites

Wang, Kui; Bahlouli, Nadia; Addiego, Frédéric; Ahzi, Saı̈d; Rémond, Yves; Ruch, David; Müller, René

doi:10.1016/j.polymdegradstab.2013.04.006

Cited by 81 publications

(77 citation statements)

References 62 publications

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“…As it can be seen in Fig. 6, the crystallization temperatures (T c ) of the PU/SSMMP nanocomposites had increased significantly, suggesting that the SSMMP acts as a nucleating agent [13,14,18]. This significant increase on the crystallization temperature of the nanocomposites can be associated with the high surface area of the SSMMP.…”

Section: Resultsmentioning

confidence: 77%

“…This significant increase on the crystallization temperature of the nanocomposites can be associated with the high surface area of the SSMMP. Wang et al notice that the significant increase of the crystallization temperature is explained by a nucleating effect of the talc particles, which generally leads to numerous but small spherulites [18]. The natural talc composites presented a Tc similar to pure PU [28].…”

Section: Resultsmentioning

confidence: 99%

“…Especially, there are many researches on the effect of talc on the mechanical properties, thermostability, crystallizability and rheology of polypropylene/talc composites [8,[17][18][19][20][21][22][23][24][25][26]. Yousfi et al reported the use of new synthetic talc as nanofiller reinforcement for polypropylene and polyamide 6 systems [8] and polypropylene/polyamide 6 blends [27], and our group noticed the use of new synthetic talc-Ni as filler to produce polyurethane nanocomposites [28].…”

Section: Introductionmentioning

confidence: 91%

See 2 more Smart Citations

Synthetic silico-metallic mineral particles (SSMMP) as nanofillers: comparing the effect of different hydrothermal treatments on the PU/SSMMP nanocomposites properties

et al. 2015

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Two new synthetic silico-metallic mineral particles like TOT-TOT swelling interstratified (SSMMP) produced with distinct hydrothermal processes (talc 7 h/315°C and talc 24 h/205°C) were used to synthesize polyurethane nanocomposites by in situ polymerization technique. These fillers were added in a range of 0.5-5 wt% related to the mass of the pure polymer. The dispersion and interaction between the fillers and the polymeric matrix were evaluated by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. The X-ray analysis indicated that the synthetic SSMMP are well dispersed/or exfoliated into the polymer matrix. The high surface area of the synthetic SSMMP was significant for the increase in the crystallinity and thermal properties of the nanocomposites. In the case of Young's modulus, for nanocomposites PU/SSMMP 24 h and the pristine PU, a similar behavior was observed. However, for the nanocomposites PU/SSMMP 7 h, an increase in the Younǵs modulus values until 3 % of filler addition when compared to pure PU was noticed. The creep-recovery test showed that both SSMMP behave as a mechanical restraint of the polyurethane chains. The results evidenced the importance of the SSMMP syntheses conditions to obtain nanocomposites with desired properties.

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Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

See 1 more Smart Citation

Synthetic silico-metallic mineral particles (SSMMP) as nanofillers: comparing the effect of different hydrothermal treatments on the PU/SSMMP nanocomposites properties

et al. 2015

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“…The recycling of different polypropylene (PP)-based conventional composite systems has been an important topic of research [1][2][3][4][5][6][7][8]. Multiple extrusion of these materials under intensive shearing at elevated temperature can lead to thermal (temperature), thermal-oxidative (temperature and oxygen) and thermal-mechanical (temperature and shear level) degradation of the matrix and to modification of the filler morphology.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Multiple Extrusions on the Properties of Montmorillonite Filled Polypropylene

et al. 2014

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Nanocomposites have attracted a great deal of interest during recent years. Much research has been conducted towards the incorporation of clay particles in a polypropylene matrix. However, the effect of extrusion reprocessing on the material properties has not been studied in depth. In this study, composites of polypropylene (PP) reinforced with organic modified montmorillonite (MMT) (4 wt%) and coupling agent were subjected to 15 extrusion cycles. The materials were characterized by melt flow index (MFI), plate-plate rheometry, tensile testing and impact measurements, differential scanning calorimetry (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed an improved intercalation of the MMT clay in the first few extrusions, thus improving the mechanical properties. Increasing the processing steps furthermore lead to a decrease in elastic modulus and impact strength, which was attributed to a reduction in matrix-filler interaction, most probably caused by organoclay degradation as shown by thermogravimetric analysis (TGA). The results of this study provide a useful insight in either the recycling of PP/MMT waste streams or the use of clay particles as a strengthening filler agent in the recycling process of different polymer waste streams.

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“…The first one is a neat PP referenced as Moplen HP500 N (highly isotactic grade produced by Lyondellbasell, Netherlands). This neat PP has a glass transition temperature of 12.2°C and a crystallinity degree of 49.2 % [42]. The second one is an ethylene propylene rubber (EPR) filled PP (referenced as SABIC, Saudi Arabia, grade 108MF97, with 22 wt % EPR) [43].…”

Section: Materials and Experimentationsmentioning

confidence: 99%

Specimen Geometry Effect on the Deformation Mechanisms of Polypropylene-Based Composites Under Impact Loading at Different Temperatures

Wang

Bahlouli

Boumbimba³

et al. 2016

J. dynamic behavior mater.

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Dynamic behaviors of polypropylene (PP), PPethylene propylene rubber (PP-EPR) and PP-nanoclay (PP-Nanocor) composites were studied by using split Hopkinson pressure bar at different temperatures and under different strain rates. Samples with two different geometries and with or without petroleum jelly lubricant were tested under identical testing conditions to compare the dynamic responses with underlying deformation mechanisms. For all the test temperatures and strain rates, the dynamic responses of neat PP and PP-Nanocor showed post-yield strain-softening, whereas those of PP-EPR showed strain-hardening after the yield point. PP-Nanocor showed more strain-softening compared with neat PP at room temperature due to the more important localized shearing deformation at the nanofiller/matrix interfaces. Friction between the sample and the bars affected the dynamic response of the materials at room temperature as well as high temperatures seen as differences in behavior between the dynamic behaviors of the non-lubricated thin samples and the non-lubricated thick samples under the same testing conditions. At room temperature and without lubrication, the thicker specimens of neat PP and PPNanocor failed during dynamic testing due to the barrelinginduced crack that propagated in the specimen and led to the formation of a peripheral fragment. Although petroleum jelly provided a satisfactory lubrication condition for both neat PP and PP-based composites at room temperature and at high temperatures, by reducing the friction effect on the yield behavior, the lubrication did not have a significant effect on the post-yield behavior of neat PP and PPNanocor, particularly for the room temperature testing and with the thick specimens.

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Effect of talc content on the degradation of re-extruded polypropylene/talc composites

Cited by 81 publications

References 62 publications

Synthetic silico-metallic mineral particles (SSMMP) as nanofillers: comparing the effect of different hydrothermal treatments on the PU/SSMMP nanocomposites properties

Synthetic silico-metallic mineral particles (SSMMP) as nanofillers: comparing the effect of different hydrothermal treatments on the PU/SSMMP nanocomposites properties

The Effect of Multiple Extrusions on the Properties of Montmorillonite Filled Polypropylene

Specimen Geometry Effect on the Deformation Mechanisms of Polypropylene-Based Composites Under Impact Loading at Different Temperatures

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