Experimental study on thermal and mechanical behavior of polypropylene, talc/polypropylene and polypropylene/clay nanocomposites

Zhou, Yuanxin; Rangari, Vijay K.; Mahfuz, Hassan; Jeelani, Shaik; Mallick, P. K.

doi:10.1016/j.msea.2005.04.014

Cited by 134 publications

(87 citation statements)

References 6 publications

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“…Some increase on yield stress can be attributed to the stiffness of the clay layers that contributes to the presence of immobilized polymer phases. This aspect is in agreement to literature [4,7,30] .…”

Section: Mechanical Propertiessupporting

confidence: 94%

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Morphology, structure and mechanical properties of polypropylene modified with organophilic montmorillonite

et al. 2012

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Abstract:The aim of this work is to study the properties of systems based on polypropylene (PP) and commercial organophilic montmorillonite, prepared by melt intercalation. Because of the non polar character of PP, the polypropylene-graft-maleic anhydride (PP-g-MA) was used as compatibilizer. Materials containing 2.5, 5, 7.5 and 10% of clay and PP, and two extra compositions containing only PP and 15 and 30% of PP-g-MA were processed using a twin-screw extruder. The level of clay dispersion was characterized by X ray diffraction, showing exfoliated/intercalated structures for different concentrations of clay. The crystallization behavior was studied by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM) with hot stage. Tensile properties were also studied and presented a moderate improvement with increase in clay concentration.

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Section: Mechanical Propertiessupporting

confidence: 94%

“…Systems based on intercalation of polymer chains into organically modified clay are one of the most studied [2][3][4][5][6][7][8][9] . The formation of nanocomposite depends on the type of surfactant intercalated on clay layers, polarity of surfactant, polymer matrix nature (olefinic/nonolefinic) and processing conditions [10] .…”

Section: Introductionmentioning

confidence: 99%

Morphology, structure and mechanical properties of polypropylene modified with organophilic montmorillonite

et al. 2012

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“…The fatigue life enhancement in the ERS polymer was particularly pronounced at the low stress ranges, which is very noteworthy for obtaining extended fatigue lives from components manufactured using such epoxy polymers. It is noteworthy that these results are in agreement with other studies where nanomodified epoxy polymers based upon carbon nano-fibres and nano-silicates have also been shown to exhibit higher fatigue lives, compared to their respective neat epoxy polymers [9,10].…”

Section: Resultssupporting

confidence: 92%

The cyclic-fatigue behaviour of an epoxy polymer modified with micron-rubber and nano-silica particles

et al. 2009

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A thermosetting epoxy resin was modified and four different types of bulk epoxy polymer sheets were prepared: (i) neat epoxy, (ii) epoxy with 9 wt.% rubber micro-particles, (iii) epoxy with 10 wt. % silica nano-particles, and (iv) epoxy with both 9 wt.% micron-rubber and 10 wt.% nano-silica particles. The tensile fatigue behaviour at a stress ratio R = 0.1 was investigated for all the materials. Addition of either the micron-rubber or nano-silica particles alone in the epoxy polymer had almost a similar beneficial effect and enhanced the fatigue life by about three to four times. The presence of both micron-rubber and nano-silica particles resulted in a further significant enhancement of the fatigue life, by about six to ten times. Fractographic studies suggested that the energy-dissipating mechanisms such as rubber cavitation and silica particle debonding, both being followed by plastic void growth of the epoxy, contributed to the enhanced fatigue lives which were observed in the modified epoxy polymers. Introduction:

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“…Various types of micro and nano sized and particulate, fibrous and layered shaped fillers have been employed in composites to enhance the mechanical properties. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] The addition of rubber micro particles has been shown to improve the fatigue and fracture behavior of epoxies and FRPs. 7,9,[15][16][17][18][19] The beneficial effect of silica nanoparticles on the fatigue and fracture toughness of epoxies and FRPs has been widely reported.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Micron-Rubber and Nano-Silica Particles on the Fatigue Crack Growth Behavior of an Epoxy Polymer

et al. 2011

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A thermosetting epoxy polymer was hybrid-modified by incorporating 9 wt. % of CTBN rubber micro particles and 10 wt. % of silica nano-particles. The unmodified and the hybrid-modified resins were poured into steel moulds and cured to produce bulk epoxy polymer sheets from which standard compact tension test specimens were machined. Fatigue crack growth tests were conducted using a 50 kN servo-hydraulic test machine, with following test parameters: stress ratio, R = σ min /σ max = 0.1, sinusoidal waveform and frequency, ν = 3 Hz. The crack length was monitored by compliance technique. The fracture surfaces were observed in a high resolution scanning electron microscope. The fatigue crack growth rate of the hybrid epoxy polymer was observed to be significantly lower than that of the unmodified epoxy polymer. The threshold stress intensity factor range, ∆K th , of the epoxy polymer was observed to increase by the addition of micron-rubber and nano-silica particles. The energy dissipating mechanisms viz., (i) cavitation of the rubber microparticles followed by plasticdeformation and void growth of the epoxy and, (ii) silica nanoparticle debonding followed by plasticdeformation and void growth of the epoxy, were observed to be operative and contribute for the reduced crack growth rate in the hybrid epoxy polymer.

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Experimental study on thermal and mechanical behavior of polypropylene, talc/polypropylene and polypropylene/clay nanocomposites

Cited by 134 publications

References 6 publications

Morphology, structure and mechanical properties of polypropylene modified with organophilic montmorillonite

Morphology, structure and mechanical properties of polypropylene modified with organophilic montmorillonite

The cyclic-fatigue behaviour of an epoxy polymer modified with micron-rubber and nano-silica particles

The Effect of Micron-Rubber and Nano-Silica Particles on the Fatigue Crack Growth Behavior of an Epoxy Polymer

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