An Investigation of Mechanical and Thermal Properties of Polypropylene Clay Nanocomposites Containing Different Nanoclays

Arunachalam, Sundaresan; Battisti, Markus; Vijayakumar, Chinnaswamy Thangavel; Friesenbichler, Walter

doi:10.1002/mame.201500107

Cited by 11 publications

(17 citation statements)

References 25 publications

(30 reference statements)

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“…The PP and the compatibilizer (PP‐g‐MA) were fed through the main hooper of the IMC and the clay nanomaterials were rather fed downstream, through an extruder barrel. Four different PP/clay nanocomposites (PP/MMT, PP/OMMT, PP/OMHT, and PP/MICA, with PP‐g‐MA in each nanocomposite) were made in this fashion, without changing the process parameters . The composition of the PP nanocomposites was presented in Table .…”

Section: Methodsmentioning

confidence: 99%

“…This lower limiting oxygen index of the PP makes it easily flammable when compared to the polymers used in industries. Over the years, it has been evidently proved that the addition of clay nanoparticles is an effective technique to reduce the flammability of polymers .…”

Section: Introductionmentioning

confidence: 99%

“…The most effective method for preparing clay nanocomposites using thermoplastic resins are in‐situ intercalative polymerization and the melt intercalation process . Generally, clay nanoparticles are hydrophilic in nature, which makes them difficult to intercalate or exfoliate in non‐polar polymer matrices.…”

Section: Introductionmentioning

confidence: 99%

“…This is due to the chain scission in the PP molecule while grafting with maleic anhydride. However, the overall property of the PP/clay nanocomposites synthesized with the compatibilizer has shown significant improvements in the properties .…”

Section: Introductionmentioning

confidence: 99%

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Thermal degradation kinetics of polypropylene/clay nanocomposites prepared by injection molding compounder

et al. 2019

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Polypropylene/clay nanocomposites with different nanoparticles are prepared using a specially designed polymer nanocomposite injection molding compounder with a hyperbolic nozzle. The thermal degradation kinetics is studied by estimating the kinetic parameter, activation energy through ASTM E1641 procedure and by the procedures suggested by ICTAC. The activation energies of PP/MMT and PP/OMHT are increasing from 121 and 147 kJ/mol K, respectively, while PP/OMMT and PP/MICA are rather on a linear or a slightly decreasing trend from 160 and 165 kJ/mol K, respectively, over the extent of conversion. The similar trend can be observed in pre-exponential factor between the different nanocomposites. The reaction model curve explains the complexity of the degradation over the extent of conversion for different nanocomposites. The optimum working temperature of the different nanocomposites prepared is estimated from the kinetic parameters obtained. The nanocomposites PP/OMMT and PP/MICA can operate for 20,000 h before losing its efficiency at 211 and 209 C, respectively, whereas, PP/MMT and PP/OMHT can operate at 165 and 198 C, respectively. The influence of the different nanoparticles, their physical and chemical characteristics in the improvement of the thermal stability has been explained.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal degradation kinetics of polypropylene/clay nanocomposites prepared by injection molding compounder

et al. 2019

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“…Recently, a specially designed hyperbolical nozzle was used to induce elongational flow for better mechanical properties in injection molded PP/clay nanocomposites [42]. A novel one-pot preparation method of extrusion, combined with water injection, was proposed for high clay dispersion into a PP-g-MAH matrix [43].…”

Section: Introductionmentioning

confidence: 99%

The effect of matrix morphology on dynamic-mechanical properties of polypropylene/layered silicate nanocomposites

Bogoeva‐Gaceva¹,

Raka

Sorrentino

2017

Maced. J. Chem. Chem. Eng.

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In this work, the influence on the morphology and viscoelastic behavior of polypropylene/clay nanocomposites of clay, in combination with different crystallization rates applied in compression molding, is reported. By deconvolution of differential scanning calorimetry (DSC) melting endotherms, it was found that the slowly cooled samples had slightly higher melting temperatures, and the crystal dimensions decreased progressively with the clay content; while, in contrast, the presence of clay particles had no influence on the crystal dimensions in fast-cooled samples. Dynamic mechanical thermal analysis (DMTA) has shown that above the glass transition temperature, nanocomposites obtained by slow cooling exhibited better mechanical response compared to the fast-cooled samples. The value of dynamic modulus E' of slow-cooled samples increased by 55 % with addition of only 1 wt% clay, which was attributed to the better reinforcing effect achieved during prolonged time of crystallization.Keywords: polypropylene; clay; nanocomposites; morphology; DMTA ВЛИЈАНИЕ НА МОРФОЛОГИЈАТА НА МАТРИЦАТА ВРЗ ДИНАМИЧКО-МЕХАНИЧКИТЕ СВОЈСТВА НА НАНОКОМПОЗИТИТЕ ПОЛИПРОПИЛЕН/СЛОЕВИТИ СИЛИКАТИВо овој труд е испитувано влијанието на глината врз морфологијата и вискоеластичните својства на нанокомпозитите полипропилен/глина добиени со пресување при примена на различни брзини на кристализација. Со деконволуција на ендотермите од диференцијалната скенирачка калориметрија (DSC), констатирано е дека бавно ладените примероци се одликуваат со незначително повисока температура на топење, а димензиите на кристалитите се намалуваат со количеството додадена глина, спротивно на примероците нагло ладени, кај кои присуството на глина нема влијание на димензиите на кристалитите. Динамичко-механичката анализа (DMTA) покажа дека над температурата на стаклосување првите поседуваат подобри механички карактеристики. Динамичкиот модул на овие примероци се зголемува за ~55 % со додаток на само 1 % глина, што се припишува на постигнатиот подобар ефект на зајакнување на матрицата при продолженото време на кристализацијата.

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Investigation on the Thermal Degradation Kinetics of Polypropylene/Organically Modified Montmorillonite Nanocomposites with Different Levels of Compatibilizer

Vimalathithan

Barile

Casavola

et al. 2018

Macro Materials & Eng

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Polypropylene/organically modified montmorillonite (OMMT) nanocomposites are prepared with different levels of compatibilizer (maleic anhydride functionalized polypropylene) and OMMT. A specially designed polymer nanocomposite injection molding compounder with a hyperbolic nozzle is used to prepare the nanocomposites. The thermal kinetic parameters, the activation energy, pre‐exponential factor, and the reaction model are estimated using isoconversional methods. The activation energy of virgin polypropylene is slightly higher than the polypropylene/OMMT nanocomposites. However, the presence of the compatibilizer is the vital reason for the lower activation energy in the polypropylene/OMMT nanocomposites. The reaction model explains the complexity of the reaction in the presence of OMMT and its influence on the accelerated charring in the later stages of degradation. The optimum working temperature of the prepared polypropylene/clay nanocomposites is significantly higher thus proving that OMMT improves the thermal stability of the nanocomposites. The polypropylene with 5% OMMT and 10% compatibilizer in its weight proportion has the optimum working temperature of 198 °C for 20 000 h before losing its integrity.

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An Investigation of Mechanical and Thermal Properties of Polypropylene Clay Nanocomposites Containing Different Nanoclays

Cited by 11 publications

References 25 publications

Thermal degradation kinetics of polypropylene/clay nanocomposites prepared by injection molding compounder

Thermal degradation kinetics of polypropylene/clay nanocomposites prepared by injection molding compounder

The effect of matrix morphology on dynamic-mechanical properties of polypropylene/layered silicate nanocomposites

Investigation on the Thermal Degradation Kinetics of Polypropylene/Organically Modified Montmorillonite Nanocomposites with Different Levels of Compatibilizer

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