Resilience improvement of an isotactic polypropylene-g-maleic anhydride by crosslinking using polyether triamine agents

Létoffé, Adrien; Hoppe, Sandrine; Laine, Richard M.; Canilho, Nadia; Pasc, Andreea; Rouxel, Didier; Riobóo, R. J. Jiménez; Hupont, Sébastien; Royaud, Isabelle; Ponçot, Marc

doi:10.1016/j.polymer.2019.121655

Cited by 12 publications

(17 citation statements)

References 48 publications

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“…As exposed in previous works, both parameters tend to slightly decrease with the increase of the molar ratio. 22,23 The 3D network inhibits the molecular chains mobility due to a higher molecular chains order. Finally, the effect of the chemical treatment on the macroscopic polymer properties was also studied using mechanical properties analyzes.…”

Section: Discussionmentioning

confidence: 99%

“…The present work demonstrated the positive impact of cross-linking on the mechanical properties of an iPP-g-MAH as previously described in case of di-and triamine aliphatic coupling agents. 22,23 The 0.75:1 molar ratio is clearly the most relevant formulation since residual reactive maleic anhydride moieties remain available to allow high interaction with metal oxides and then high level of adhesion for the production of multimaterials composites.…”

Section: Discussionmentioning

confidence: 99%

“…The resulting brittle to ductile transition in line with results published earlier. 2,22,23 In order to identify the microstructural processes involved in the deformation at large strains, SEM observations were performed on fracture surfaces. Micrograph in Figure 6(a) illustrates the case of the less modified material (0.5:1).…”

Section: Mechanical Behavior Of Cross-linked Ca100 Materialsmentioning

confidence: 99%

“…[19][20][21] More advanced workers analyzed on the influence of NH 2 :MAH molar ratio on the macromolecular architecture, the cross-link density, the semi-crystalline microstructure and the mechanical properties. 22,23 Calix[n]arene macrocycles are composed of n phenol units (n = 4 to 16) bound to each other by methylene groups. As such, they play an important role in supramolecular chemistry.…”

Section: Introductionmentioning

confidence: 99%

“…Otherwise some authors studied the reaction of excess diamines in iPP‐ g ‐MAH systems and concluded that primary amines favor chain grafting 19–21 . More advanced workers analyzed on the influence of NH 2 :MAH molar ratio on the macromolecular architecture, the cross‐link density, the semi‐crystalline microstructure and the mechanical properties 22,23 …”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Use of a bis(aminoalkyl)‐calix[4]arene derivative as cross‐linking agent to enhance functional and mechanical properties of a maleated polypropylene

Lara

Létoffé

Hoppe

et al. 2020

J of Applied Polymer Sci

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An isotactic polypropylene grafted by 1 wt% of maleic anhydride (iPP-g-MAH) was chemically modified to provide it with new functional abilities and improved mechanical properties. The specific additive considered in this work is a derivative of bis(aminoalkyl)-calix[4]arene. Not only this molecule serves as a cross-linking agent, but it offers grafting sites for metallic ions that confer electrolytic conductivity to the initially insulating polyolefin. Materials were

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Mechanical Behavior Of Cross-linked Ca100 Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Use of a bis(aminoalkyl)‐calix[4]arene derivative as cross‐linking agent to enhance functional and mechanical properties of a maleated polypropylene

Lara

Létoffé

Hoppe

et al. 2020

J of Applied Polymer Sci

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Amination of polypropylene‐g‐(maleic anhydride) using reactive extrusion

Kay,

Goddard

2024

J of Applied Polymer Sci

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We report synthesis of a radical scavenging aminated thermoplastic polymer through reactive extrusion of polyethyleneimine (PEI) with a polypropylene and polypropylene‐graft‐maleic anhydride (PP‐g‐MA) meltblend. The reaction was confirmed using acid orange 7 (AO7) amine density assay, toluidine blue O (TBO) carboxylic acid density assay, Fourier transform infrared spectroscopy (FTIR), and a migration assay. FTIR spectra revealed a reduction of the asymmetric stretching of the maleic anhydride (MA) carbonyl group at 1777 cm−1 and the emergence of the maleimide carbonyl peak at 1702 cm−1. AO7 supported surface orientation of grafted amine groups by introduction of 7.22 nmol cm−2 primary amines, corresponding to the reduction of surface carboxylic acids quantified by TBO from 12.46 nmol cm−2 to 0.43 nmol cm−2. After incubation (40°C, 10 days) in ethanol, acetic acid, and water, < 0.1 mg cm−2 PEI migrated from the materials, supporting the covalent nature of the grafting. Antioxidant activity was demonstrated exhibiting 5.90 and 4.31 nmol Troloxeq cm−2 in aqueous and organic environments, respectively. Results indicate a successful condensation reaction during reactive extrusion, producing an aminated thermoplastic polymer with antioxidant activity for target applications such as food packaging, wastewater treatment, carbon capture, and others.

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Real‐time Raman spectroscopy measurements to monitor the effect of polypropylene crosslinking on its true mechanical behaviour

Létoffé

Ponçot

Huchard

et al. 2021

J Raman Spectroscopy

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In‐situ Raman spectroscopy analysis to mechanical tests were performed to investigate the deformation micromechanisms of an isotactic polypropylene‐grafted maleic anhydride (PP‐g‐MAH) depending on the crosslinking degree provided by functional polyether amine molecules. The switch from brittle to highly ductile mechanical behaviours was focused in terms of microstructure modifications in real time during stretching. From the Raman spectral analysis, crystallinity index and macromolecular chains orientation factors for both crystalline and amorphous phases were determined. A new orientation factor relative to the polyether segments was proposed. The results shown allow a more complete understanding of the proper micromechanisms of deformation involved in each phase and their interaction between one another. These results also highlight the impact of the crosslinking reaction on the material resilience improvement.

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Resilience improvement of an isotactic polypropylene-g-maleic anhydride by crosslinking using polyether triamine agents

Cited by 12 publications

References 48 publications

Use of a bis(aminoalkyl)‐calix[4]arene derivative as cross‐linking agent to enhance functional and mechanical properties of a maleated polypropylene

Use of a bis(aminoalkyl)‐calix[4]arene derivative as cross‐linking agent to enhance functional and mechanical properties of a maleated polypropylene

Amination of polypropylene‐g‐(maleic anhydride) using reactive extrusion

Real‐time Raman spectroscopy measurements to monitor the effect of polypropylene crosslinking on its true mechanical behaviour

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