The thermo-mechanical response of PP nanocomposites at high graphene loading

Yang, Kai; Endoh, Maya K.; Trojanowski, Rebecca; Ramasamy, Radha Perumal; Gentleman, Molly M.; Butcher, T.; Rafailovich, Miriam

doi:10.1179/2055033215y.0000000008

Cited by 25 publications

(21 citation statements)

References 42 publications

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“…Table 4 displays the comparison of the mechanical performance and flame retardation of the PP/PP-g-MA/ APZS composites with various PP nanocomposites reported in the literature. [3,[61][62][63][64][65][66][67] It can be inferred that the present study exhibited superior mechanical performance and flame retardation as compared to the reported values, especially in the absence of the IFR compounds. However, it should be noted that the properties of each nanocomposite can differ from others due to several factors, including processing conditions, types of fillers, interfacial interaction, filler morphology, testing parameters, IFR compounds, and so forth.…”

Section: Resultsmentioning

confidence: 71%

Polypropylene/phosphazene nanotube nanocomposites: Thermal, mechanical, and flame retardation studies

Vengatesan

Singh

Devaraju

et al. 2020

J of Applied Polymer Sci

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In this study, flame retardant polypropylene (PP) nanocomposites with superior mechanical performance have been developed using amine‐functionalized phosphazene nanotubes (APZS, 1–10 wt%) through melt‐blending method. Polypropylene‐graft‐maleic anhydride was used as the compatibilizer to attain effective interaction between the nanofiller and the PP matrix. The characterization of amine‐functionalized phosphazene nanotubes (APZS) using solid‐state nuclear magnetic resonance (NMR), X‐ray photoelectron spectroscopy, X‐ray diffraction, fourier‐transform infrared (FTIR), and transmission electron microscopy indicated successful amine functionalization, though structural changes were observed as compared to the unfunctionalized nanotubes. Owing to the covalent polymer‐filler interfacial interactions and resulting in uniform filler dispersion, the nanocomposites exhibited significant enhancement in the tensile modulus up to 5 wt% APZS content (98% increment at 5 wt% content as compared to pure polymer). The addition of a small fraction of APZS (1 wt%) improved the impact strength of the nanocomposite by more than 180%. APZS acted as a weak nucleating agent for PP, thereby leading to enhanced degree of crystallinity (up to 5 wt% APZS content). The thermal stability of the nanocomposites was also enhanced with APZS content. The nanocomposites with 5 and 10 wt% APZS loading exhibited a V0 rating in UL‐94 test, indicating that APZS introduced a robust flame retardancy behavior in the PP nanocomposites. The limiting oxygen index values also confirmed the findings from the UL‐94 analysis. The developed nanocomposites exhibit high potential of use in a wide range of high temperature applications.

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Section: Resultsmentioning

confidence: 71%

Polypropylene/phosphazene nanotube nanocomposites: Thermal, mechanical, and flame retardation studies

Vengatesan

Singh

Devaraju

et al. 2020

J of Applied Polymer Sci

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“…In addition to its compatibilizing effect and char promotion effect, the high thermal conductivity of graphene has drawn a great attention as well. Kai et al melt blended graphene with polypropylene (PP) [54]. PP blends with carbon black and Cu microparticles, which also have high thermal conductivity, were also prepared.…”

Section: Thermal Conductivitymentioning

confidence: 99%

Flame Retardant Polymer Nanocomposites and Interfaces

Xue¹,

Guo²,

Rafailovich³

2019

Flame Retardants

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The flame retardant efficiency of polymer nanocomposites is highly dependent on the dispersion of the nano-fillers within the polymer matrix. In order to control the filler dispersion, it is very essential to explore the interfacial compatibility between fillers and matrices, which provides a guide for the flame retardant nanocomposites compounding. In this short review, we mainly focus on the thermoplastic polymers and their interactions with the surfaces of the flame retardant fillers. Other physical properties of those nanocomposites such as mechanical properties, gas permeability, rheological performance and thermal conductivity are also briefly reviewed along with the flame retardancy, since they are all dispersion related.

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“…The addition of nanofillers such as layered silicates or organoclays, cellulose nanocrystals, carbon nanotubes (CNT) or graphene nanoplatelets (GNP) have all been explored to boost the performance of oriented polymer fibres or films. Property improvements included not only functional properties such as electrical or thermal conductivities when using nanocarbons like CNTs or graphene [11][12][13] but also focused on mechanical performance enhancements [5,14,15]. However, the question remains in many of these studies if the improvements in mechanical performance came from true nanofiller reinforcement or from some kind of modification of the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Nanoclay assisted ultra-drawing of polypropylene tapes

et al. 2019

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Isotactic polypropylene (i-PP)montmorillonite (MMT) nanocomposite films were prepared by melt-compounding and hot-pressing. The influence of organoclays on the mechanical properties and drawability of these isotropic composite films was investigated. Ultimate properties of solid-state drawn PP tapes incorporating 2.5 wt% MMT outperformed those of pure PP tapes. Interestingly, these improvements were found not to be the result of a mechanical reinforcement effect of the nanoclay platelets but merely the result of a more efficient ultra-drawing mechanism with MMT acting as a processing additive that altered initial polymer morphology and drawing behaviour. Hence, the introduction of MMT resulted in higher ultimate draw ratios and subsequently higher ultimate mechanical properties of the oriented nanocomposite tapes.

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The thermo-mechanical response of PP nanocomposites at high graphene loading

Cited by 25 publications

References 42 publications

Polypropylene/phosphazene nanotube nanocomposites: Thermal, mechanical, and flame retardation studies

Polypropylene/phosphazene nanotube nanocomposites: Thermal, mechanical, and flame retardation studies

Flame Retardant Polymer Nanocomposites and Interfaces

Nanoclay assisted ultra-drawing of polypropylene tapes

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