Organically Modified Montmorillonite as Nanoreactor to Improve the Grafting Degree of Maleic Anhydride onto Polypropylene

Li, Zhenghui; Yu, Peijie; Chen, Lu; Zhang, Lingli; Hu, Hongyu

doi:10.1155/2020/8151290

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…A series of studies also appear in the literature that attempt to graft MA onto PP while using the oMt as support of an organic peroxide, initiator of the reaction. [21][22][23][24] These publications mainly analyze the effectiveness of the functionalization technique, while the effect of PP modification on composites morphology and properties is practically not addressed.…”

Section: Introductionmentioning

confidence: 99%

Polypropylene nanocomposites produced by in‐situ grafting of maleic anhydride using different mixing procedures

Merchán Sandoval,

Failla,

Quinzani

2024

Polymer Composites

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Nanocomposites (NC) of polypropylene (PP) and organophilic montmorillonite (oMt) are produced by reactive mixing with simultaneous grafting of maleic anhydride (MA) onto PP using organic peroxide as initiator. Five different strategies of incorporating reactants and clay into a laboratory mixer are used. The structure of composites is examined by FT‐IR spectroscopy, x‐ray diffraction and scanning electron microscopy. Rotational rheometry, thermogravimetry and oxygen permeability are used to evaluate properties. The preparation method has a remarkable influence on NC's structure. Simultaneous addition of peroxide and MA to molten PP followed by incorporation of clay 20 minutes later produces the best degree of clay exfoliation/disaggregation. The NCs obtained using this procedure are highly transparent and have very thin tactoids with interlayer spacing more than 50% larger than the original oMt. The incorporation of just 2 wt% of clay gives place to more than 30% reduction in PP oxygen permeability. Additionally, the temperature at the maximum thermal degradation rate in nitrogen reduces in about 60°C while the temperature at which the thermal degradation process begins is not affected.Highlights Highly intercalated/exfoliated PP/oMt nanocomposites are synthesized Reactive mixing procedure affects the quality of nanocomposite's structure A initial period of grafting before clay addition is the most effective method Highly transparent materials with small tactoids of d001>4 nm is generated PP oxygen permeability is highly reduced by the use of just 2 wt% of nanoclay

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Section: Introductionmentioning

confidence: 99%

Polypropylene nanocomposites produced by in‐situ grafting of maleic anhydride using different mixing procedures

Merchán Sandoval,

Failla,

Quinzani

2024

Polymer Composites

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“…To solve the problem of low grafting ratio, electron-donating monomers such as styrene (St), α-methylstyrene and scCO 2 are added in the preparation of MAH [4][5][6][7][8]. However, they produce a pungent odor that limits the application of PP-g-MAH [9,10]. Furthermore, the reactive extrusion process causes extreme degradation of PP, directly impacting its performance [2,11].…”

Section: Introductionmentioning

confidence: 99%

A new method for preparing anhydride grafted polypropylene with high grafting ratio by combining microwave reaction and reactive extrusion

Qiu¹,

Li²,

Wu³

et al. 2023

Preprint

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Maleic anhydride grafted polypropylene (PP-g-MAH) is an effective compatibilizer in the preparation of polypropylene composites. Its grafting ratio plays an important role in the dispersion of filler or blend in polypropylene (PP) matrix resin, but the grafting ratio of PP-g-MAH prepared by reactive extrusion is low. A method for preparing PP-g-MAH with high grafting ratio and low odor was proposed by combining microwave reaction and melt extrusion. The grafting ratio of the PP-g-MAH products obtained by this method without the assistance of comonomer reached 1.95%. The results of melt index and rheology showed that the crosslinking occurred during the preparation process, thus avoiding the large reduction of molecular weight of PP. Meanwhile, the problem of odor was avoided because no comonomer was added during the process. The application results showed that PP-g-MAH prepared by this method improves the compatibility of glass fiber (GF) and PP, thus improving the mechanical properties of polypropylene/glass fiber (PP/GF) composites. This work explored a novel way to prepare PP-g-MAH with high grafting ratio.

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A new method for preparing anhydride grafted polypropylene with high grafting ratio by combining microwave reaction and reactive extrusion

Qiu¹,

Li²,

Wu³

et al. 2023

J Polym Res

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Organically Modified Montmorillonite as Nanoreactor to Improve the Grafting Degree of Maleic Anhydride onto Polypropylene

Cited by 3 publications

References 26 publications

Polypropylene nanocomposites produced by in‐situ grafting of maleic anhydride using different mixing procedures

Polypropylene nanocomposites produced by in‐situ grafting of maleic anhydride using different mixing procedures

A new method for preparing anhydride grafted polypropylene with high grafting ratio by combining microwave reaction and reactive extrusion

A new method for preparing anhydride grafted polypropylene with high grafting ratio by combining microwave reaction and reactive extrusion

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