Study on nonisothermal crystallization of maleic anhydride grafted polypropylene/montmorillonite nanocomposite

Li, Jian; Zhou, Chixing; Wang, Gang

doi:10.1016/s0142-9418(02)00085-5

Cited by 114 publications

(65 citation statements)

References 16 publications

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“…The addition of 5% of PP-g-MA in C20A and C30B shows optimum improved performance with the increase in the tensile strength of 22% and 14%, respectively. The reason may be due to high surface area of nanofillers, presence of tallow ammonium group, compatibilising agent, breaking up the large particles into fine nanoparticles which results in higher interfacial adhesion between TPO and clay [13][14][15][16][17]. Similar observations were reported for nylon-6 blended poly(ethylene-ran-propylene) rubber and polystyrene with polypropylene [18][19][20].…”

Section: Tensile Propertiesmentioning

confidence: 52%

Polypropylene-blended organoclay nanocomposites – preparation, characterisation and properties

Nalini

Nagarajan

Reddy

2012

Journal of Experimental Nanoscience

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Intercalated/exfoliated nanocomposites of thermoplastic polyolefin (TPO) blended nanoclay (Cloisite 20 A and Cloisite 30B) were fabricated using melt extrusion process. Polypropylene grafted maleic anhydride (PP-g-MA) was used as a compatibiliser to improve the dispersibility of clay. TPO/nanoclay composites were prepared with different percentages of clay loading (3, 5 and 7 wt%) by adding PP-g-MA as a compatibiliser. The nanocomposites having 5 wt%C20A/5 wt% compatibiliser exhibited a remarkable improvement in mechanical (tensile modulus, flexural modulus and impact strength) and thermal (heat distortion temperature, HDT) properties. The thermal measurements have been carried out by differential scanning calorimetry, thermogravimetric analysis and HDT methods. Dynamic mechanical analysis studies indicated that PP macromolecules were intercalated or exfoliated between the interlayer of silicates. The morphology of nanocomposites was characterised by scanning electron microscopy (SEM) and X-ray diffraction (XRD) was used to find out the arrangement of crystals in the nanocomposites. The SEM and XRD clearly demonstrated the progressive break up of particles and results in decreased particle size with the optimised combination.

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Section: Tensile Propertiesmentioning

confidence: 52%

Polypropylene-blended organoclay nanocomposites – preparation, characterisation and properties

Nalini

Nagarajan

Reddy

2012

Journal of Experimental Nanoscience

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“…It indicates that crystallization of PP-g-MA/nanoclay composite occurs in one stage at higher rate than PP-g-MA, where crystallization has two stages. The reason of this may be the nucleation effect of nanoclay, that points out in literature [5,12,13].…”

Section: D Graphmentioning

confidence: 96%

Study on Structure and Crystallization of Polypropylene Grafted Maleic Anhydride/Nanoclay Composite

Bui

Hưng

2017

AJSTD

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Nanocomposite from polypropylene grafted maleic anhydride (PP-g-MA) and nanoclay were prepared by melt proccessing in Brabender extruder. XRD analysis shows the formation of nanostructure (intercalated and exfoliated) of nanocomposite with interlayer space (d-space) increasing from 26.3Å to 30.9Å. These structures, however, do not affect the microcrystalline structure of polymer part of nanocomposite in whole. The study on nonisothermal crystallization shows the development in 3-dimentional direction of crystallites, that means spherulite form of crystalline structure.

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“…24 In our study, n values lied in 2.6 to 2.9 for all samples, which is consistent with other PP composite systems such as PP/carbon nanotubes, 25 PP/nano-calcium carbonate, 26 and PP/clay composites. 27 They increased with an increase of cooling rate. However, at a given cooling rate and CNF content, n values of both untreated and heat treated CNF composites showed similar to those of pure PP.…”

mentioning

confidence: 93%

Effect of Carbon Nanofiber Structure on Crystallization Kinetics of Polypropylene/Carbon Nanofiber Composites

Lee¹,

Hahn²,

Ku³

et al. 2011

Bulletin of the Korean Chemical Society

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Effect of heat treatment of carbon nanofibers (CNF) on electrical properties and crystallization behavior of polypropylene was reported. Two types of CNFs (untreated and heat treated at 2300 °C) were incorporated into polypropylene (PP) using intensive mixing. A significant drop in volume resistivity was observed with composites containing untreated 5 wt % and heat treated 3 wt % CNF. In non-isothermal crystallization studies, both untreated and heat treated CNFs acted as nucleating agents. Composites with heat treated CNFs showed a higher crystallization temperature than composites with untreated CNFs did. TEM results of CNF revealed that an irregular structure of CNFs can be converted into the continuous graphitic structure after heat treatment. Furthermore, STM showed that the higher carbonization temperature leads to the higher graphite degree which presents the larger carbon network size, suggesting that a more graphitic structure of CNFs led to a higher crystallization temperature of PP.

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Study on nonisothermal crystallization of maleic anhydride grafted polypropylene/montmorillonite nanocomposite

Cited by 114 publications

References 16 publications

Polypropylene-blended organoclay nanocomposites – preparation, characterisation and properties

Polypropylene-blended organoclay nanocomposites – preparation, characterisation and properties

Study on Structure and Crystallization of Polypropylene Grafted Maleic Anhydride/Nanoclay Composite

Effect of Carbon Nanofiber Structure on Crystallization Kinetics of Polypropylene/Carbon Nanofiber Composites

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