Non-isothermal crystallization kinetics of polypropylene/silicon nitride nanocomposites

Hao, Wentao; Yang, Wen; Cai, He; Huang, Yiping

doi:10.1016/j.polymertesting.2010.03.004

Cited by 75 publications

(39 citation statements)

References 29 publications

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“…As can be seen, the increase of the cooling rate decreases these two temperatures. Similar results have been obtained in the literature [20][21][22].…”

Section: Non-isothermal Crystallizationsupporting

confidence: 92%

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Cooling rate effects on the crystallization kinetics of polypropylene/date palm fiber composite materials

Boukettaya

Seddique

Alawar

et al. 2015

Science and Engineering of Composite Materials

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Non-isothermal crystallization kinetics of polypropylene/date palm fiber (PP/DPF) composite materials were investigated in this study, using the differential scanning calorimetry (DSC) method. Different fiber contents and cooling rates, varying from 2.5°C/min to 20°C/ min, were considered. The obtained results indicated that the initial crystallization temperature increases with the increase of the DPF content. This was attributed to the nucleating ability of these fibers. Several theoretical models were used to predict the non-isothermal crystallization kinetics of the materials considered in this study. Basically, it was shown that both the Avrami analysis, modified by Jeziorny, and the method developed by Mo could adequately describe such kinetics. The activation energies required during the overall crystallization process and at different amounts of the relative degree of crystallinity were also evaluated using the Kissinger method and the isoconversional analysis of calorimetric data, respectively. It was shown that the presence of the DPFs in the PP matrix decreases these energies, confirming their nucleating ability during the non-isothermal crystallization process.

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“…As can be seen, the increase of the cooling rate decreases these two temperatures. Similar results have been obtained in the literature [20][21][22].…”

Section: Non-isothermal Crystallizationsupporting

confidence: 92%

“…Different models have been proposed in the literature, to describe the non-isothermal crystallization behavior of natural fiber composite materials [20][21][22][23][24][25][26][27][28]. Grozdanov et al [20], using DSC analysis, characterized such behavior for the kenaf fiber/PP composites.…”

Section: Introductionmentioning

confidence: 99%

Cooling rate effects on the crystallization kinetics of polypropylene/date palm fiber composite materials

Boukettaya

Seddique

Alawar

et al. 2015

Science and Engineering of Composite Materials

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“…The nonisothermal crystallization behavior of nylon6(PA6)/attapulgite (AT) composites was studied by Shi et al [17] using differential scanning calorimetry, which indicated that AT nano-particles acted as nucleating agents during the crystallization of PA6/AT blends. Several authors present results based on PP crystallization process [13,[18][19][20][21][22] . The nucleating effect of nanoparticules of montmorilonite on crystallization process of systems based on PP + PP-g-MA (maleic anhydride grafted polypropylene) has been studied by Maiti et al [23] , and they related the decrease of spherulite size with increasing clay content which indicates that clay particles act as nucleating agents.…”

Section: Introductionmentioning

confidence: 99%

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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“…Both n and K t depends on the crystallization mechanism. For a constant cooling rate, if log (−ln(1− X c ( t ))) versus log(t) become linear, Avrami equation can be applied to determine the crystallization behavior of a polymer composite system . The results of Avrami analysis for nonisothermal crystallization of neat PP, nano, micro, and hybrid composites at a constant cooling rate of 5°C/min are reported in Table .…”

Section: Resultsmentioning

confidence: 99%

Mechanical and Thermal Properties Modeling, Sorption Characteristics of Multiscale (Multiwalled Carbon Nanotubes/Glass Fiber) Filler Reinforced Polypropylene Composites

Rasana

Jayanarayanan

Pavithra

et al. 2019

Vinyl Additive Technology

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The present work was aimed to investigate the individual and hybrid reinforcement effect of multiscale fillers [glass fibers (GF)/multiwalled carbon nanotubes (MWCNTs)] in polypropylene (PP) matrix. The MWCNT content in the hybrid composites was varied from 0.5 to 5 wt%, and glass fiber fraction was fixed as 20 wt%. The morphology of nano and hybrid composite revealed reasonable dispersion of MWCNTs and glass fibers in the matrix. At a MWCNT content of 3 wt%, the optimum tensile properties for the hybrid composites were achieved and beyond which it declined due to agglomeration effects as revealed by transmission electron microscopy. A comparative study of the experimental and predicted values of moduli of nano, micro, and hybrid composites using various micromechanical models was conducted. The simultaneous incorporation of MWCNTs and glass fibers in PP restricted the mobility of polymer chains as indicated by the increase in storage modulus and rise in glass transition temperature obtained by dynamic mechanical analysis. The differential scanning calorimetry studies indicated that the inclusion of 2 wt% of MWCNTs increased the crystallinity of PP from 58.2 to 69.1% in hybrid composites. The Avrami and Mo models were used to explore nonisothermal crystallization kinetics, and Mo model was in close agreement with the experimental results. The sorption behavior of the composites revealed that the formation of immobilized regions developed by the simultaneous inclusion of micro and nano fillers delayed the transport of the solvent. J. VINYL ADDIT. TECHNOL., 25:E94–E107, 2019. © 2019 Society of Plastics Engineers

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Non-isothermal crystallization kinetics of polypropylene/silicon nitride nanocomposites

Cited by 75 publications

References 29 publications

Cooling rate effects on the crystallization kinetics of polypropylene/date palm fiber composite materials

Cooling rate effects on the crystallization kinetics of polypropylene/date palm fiber composite materials

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

Mechanical and Thermal Properties Modeling, Sorption Characteristics of Multiscale (Multiwalled Carbon Nanotubes/Glass Fiber) Filler Reinforced Polypropylene Composites

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