Polyamide blend-based nanocomposites: A review

Chow, W. S.; Ishak, Z. A. Mohd

doi:10.3144/expresspolymlett.2015.22

Cited by 65 publications

(47 citation statements)

References 114 publications

(152 reference statements)

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“…The observation that the mechanical and rheological properties of thermoplastics are less affected by BA may pave the way to filler hybridization in nanocomposites. The combined use of BA with layered silicates, modified graphenes may yield synergistic effects. Filler hybridization may be the right way to enhance the fire retardance of nanocomposites containing BA (especially those of intumescent types) that failed to meet the expectations when introduced alone.…”

Section: Thermoplastic/ba Nanocompositesmentioning

confidence: 99%

Polymer/boehmite nanocomposites: A review

Karger‐Kocsis

Lendvai

2017

J of Applied Polymer Sci

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Boehmite is an aluminum oxyhydroxide [AlO(OH)] which is preferentially used as precursor for the production of (transition) aluminum oxides. Boehmite alumina (BA) nanoparticles are available in various morphologies due to versatile synthesis routes, which are briefly introduced. The peripheral hydroxyl groups of BA offer manifold functionalization possibilities for tailoring the dispersion and filler/matrix adhesion properties. The incorporation of BA nanofillers, with and without surface treatments, may yield improved mechanical and novel functional properties in polymers. BA can be introduced in polymers and polymer composites through different methods. This comprehensive overview covers the basic results reported on polymer/BA nanocomposites in the open literature. In this review, polymer matrices are grouped into thermoplastics, thermosets, and rubbers. Using literature results and our own findings, we have identified promising R&D trends with polymer/BA nanocomposites. V C 2017 Wiley Periodicals, Inc. J.Appl. Polym. Sci. 2018, 135, 45573.

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Section: Thermoplastic/ba Nanocompositesmentioning

confidence: 99%

Polymer/boehmite nanocomposites: A review

Karger‐Kocsis

Lendvai

2017

J of Applied Polymer Sci

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“…It is intuitive that a robust tribofilm should have very good adhesion to the counterpart (usually metal surface) and at the same time high resistance to shear (being the prevailing mechanical loading). Nanoparticles proved to be promising additives to enhance the strength [5], also in shear deformation, in various polymers. Therefore, they may be promising additives to improve the cohesive strength of the tribofilm.…”

Section: Introductionmentioning

confidence: 99%

“Ultralow” sliding wear polytetrafluoro ethylene nanocomposites with functionalized graphene

Padenko

Rooyen

Wetzel

et al. 2016

Journal of Reinforced Plastics and Composites

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Abstract:The dry friction and sliding wear behavior of sintered PTFE containing various amounts of functionalized graphene (GR) were studied in this work. GR was incorporated in 0, 0.25, 0.75, 1, 2 and 4 vol%, respectively. Sliding wear tests were performed in ring(metal)-on-plate(PTFE) (ROP) test rig under ambient temperature setting 1 m/s sliding speed and 1 MPa contact pressure. The dynamic coefficient of friction (COF) and specific wear rate (ws) data were determined. Very low COFs (0.12-0.14) were measured for PTFE containing 2 or 4 vol% GR which was attributed to the formation of a tribofilm on the countersurface. ws went through a maximum (peaked at doubling that of the unmodified PTFE at about 0.75 vol% GR) as a function of GR content. Ultralow ws data in the range of 10 -6 mm 3 /(N.m) were measured for the PTFE nanocomposites with 2 and 4 vol% GR. This was reasoned by the formation of a robust tribofilm, the development of which was followed by scanning electron microscopy (SEM) by inspecting the worn surface of PTFE nanocomposites and that of the steel ring of the ROP test rig. Fourier transform infrared spectroscopic results confirmed the formation of carboxyl groups in the tribofilm. They were 2 supposed to react with the functional groups of GR and to create complexes with the metal countersurface ensuring the tribofilm with high adhesion and cohesion strengths.

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“…Mostly, two competing mechanisms influence the crystallization kinetics and the degree of crystallinity. Both these mechanisms are connected with the nanoparticle inclusions which could act either as nucleation centres or as retarding agents . The domination of one mechanism over the other depends on the filler content.…”

Section: Resultsmentioning

confidence: 99%

Effect of moisture and filler content on the structural, thermal and dielectric properties of polyamide‐6/boehmite alumina nanocomposites

Tomara

Karahaliou

Anastassopoulos

et al. 2019

Polymer International

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Polyamide‐6 (PA‐6)/boehmite alumina (BA) nanocomposites were prepared via direct melt compounding. Structural, thermal and dielectric properties of ‘as‐received’ (including moisture) and ‘dried’ (thermally treated) specimens were examined. The BA nanofiller was homogeneously dispersed in the PA‐6 matrix. XRD and FTIR revealed that crystallization of PA‐6 in the γ phase was favoured over α phase with increasing BA content. The crystallinity index (CI) and the percentage of α and γ phases were also evaluated. Dried specimens exhibited a lower CI than as‐received specimens while the CI decreased with the addition of filler. Broadband dielectric spectroscopy revealed the presence of γ, β and α relaxations, the Maxwell–Wagner–Sillars effect and the contribution of conductivity relaxation in the as‐received samples. The drying procedure unmasked a double feature of both β and α modes. The results of the complementary techniques were analysed and the effects of moisture and/or the incorporation of BA nanofiller on the microstructure of the PA‐6 matrix are disclosed. © 2019 Society of Chemical Industry

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Polyamide blend-based nanocomposites: A review

Cited by 65 publications

References 114 publications

Polymer/boehmite nanocomposites: A review

Polymer/boehmite nanocomposites: A review

“Ultralow” sliding wear polytetrafluoro ethylene nanocomposites with functionalized graphene

Effect of moisture and filler content on the structural, thermal and dielectric properties of polyamide‐6/boehmite alumina nanocomposites

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