Polymer Nanocomposites: Synthesis, Microstructure, and Properties

Mittal, Vikas

doi:10.1002/9783527629275.ch1

Cited by 25 publications

(24 citation statements)

References 44 publications

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“…With polymers used as host matrices in various composite films, nanomaterials are incorporated in the polymer matrix as a filler or pigment. When fillers are embedded into a polymer, the resulted hybrid organic–inorganic material is known as a polymer nanocomposite [116,117].…”

Section: Nanocoating and Its Role In Corrosion Preventionmentioning

confidence: 99%

A Review on the Corrosion Behaviour of Nanocoatings on Metallic Substrates

et al. 2019

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Growth in nanocoatings technology is moving towards implementing nanocoatings in many sectors of the industry due to their excellent abilities. Nanocoatings offer numerous advantages, including surface hardness, adhesive strength, long-term and/or high-temperature corrosion resistance, the enhancement of tribological properties, etc. In addition, nanocoatings can be applied in thinner and smoother thickness, which allows flexibility in equipment design, improved efficiency, lower fuel economy, lower carbon footprints, and lower maintenance and operating costs. Nanocoatings are utilised efficiently to reduce the effect of a corrosive environment. A nanocoating is a coating that either has constituents in the nanoscale, or is composed of layers that are less than 100 nm. The fine sizes of nanomaterials and the high density of their ground boundaries enable good adhesion and an excellent physical coverage of the coated surface. Yet, such fine properties might form active sites for corrosion attack. This paper reviews the corrosion behaviour of metallic, ceramic, and nanocomposite coatings on the surface of metallic substrates. It summarises the factors affecting the corrosion of these substrates, as well as the conditions where such coatings provided required protection.

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Section: Nanocoating and Its Role In Corrosion Preventionmentioning

confidence: 99%

A Review on the Corrosion Behaviour of Nanocoatings on Metallic Substrates

et al. 2019

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“…It can be seen that, with the increase in frequency, the viscosities of all the samples decrease, showing shear thinning behaviour. This can be explained as the greater the shear rate, the more quickly two molecules move relative to each other, which leads to reduced chain entanglement density [34]. As a result, fewer polymer chains remain in the entanglement state for a sufficiently long time, which causes the drop in viscosity.…”

Section: Resultsmentioning

confidence: 99%

Rheological and electrical percolation thresholds of multi‐walled carbon nanotube/in‐situ polymerised Nylon12 nanocomposites

Faridirad

Ahmadi

Barmar

2018

Micro & Nano Letters

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In this work, in-situ polymerisation of laurolactam in the presence of multi-walled carbon nanotube (MWCNT) was performed toward MWCNT/Nylon12 nanocomposite. Different levels of MWCNT (0.1, 0.3, 0.7, 1.2 and 3.5 wt%) were introduced to the monomer in the presence of 2 wt% toluene diisocyanate and 1 wt% sodium caprolactam as an activator and catalyst, respectively. The test results indicated that by increasing the amount of MWCNT, the conductivity of the nanocomposite increased up to that level at which it could serve as an electrically conductive material at room temperature. The melt rheological measurements showed a transition from liquid-like to solid-like state. The rheological results obtained within the linear viscoelastic region demonstrated that the rheological percolation threshold happened at 0.1 wt% multi-walled nanotube (MWNT), whereas the electrical percolation threshold appeared at 1.2 wt% MWCNT. A homogeneous dispersion of MWCNT into the Nylon12 matrix with a high aspect ratio of MWNT was achieved at a low percolation threshold. This mainly could be attributed to the fact that a denser MWCNT network was required for electrical conductivity, while a less dense MWCNT network sufficiently impeded Nylon12 chain mobility related to the rheological percolation threshold.

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“…The solution mixture was stirred vigorously for the next 1 h at room temperature. These selected process parameters are empirical and based on several literature surveys to ensure uniform dispersion of graphene in the PB matrix . Eventually, the mixture was slowly poured into the excess of acetone solvent to precipitate the compound.…”

Section: Methodsmentioning

confidence: 99%

“…Despite the vast difference between the elastomer and nanofiller's properties, the mixing of these two classes of materials is an inevitable process in the development of modern day elastomeric nanocomposites. Elastomers are widely used as matrixes, and the consequently formed nanocomposites exhibit high physical and thermal properties …”

Section: Introductionmentioning

confidence: 99%

Temperature‐triggered three‐dimensional network formation in graphene–polybutadiene nanocomposite

Pal

Chatterjee

Naskar

2019

J of Applied Polymer Sci

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Since the invention of vulcanization in the early 19th century, the study on potential factors affecting the crosslink network formation and the corresponding changes in the initial physiochemical attributes of elastomer has been the subject of prime interest. Where several investigations highlight the mechanism and kinetics of the crosslink network formation, the exclusive effect of compounding ingredients, such as filler, plasticizer, and anti‐oxidant, is still being pursued. In this direction, we report preparation and characterization of cis‐1,4‐polybutadiene (PB)–graphene (G) nanocomposite and highlight a phenomenon in which graphene induces the spontaneous chemical reactions in the cis‐1,4‐polybutadiene elastomer matrix triggered at 170 °C temperature. PB–G nanocomposites were prepared by a fairly simple solution mixing and precipitation process, and such nanocomposites were analytically investigated using several characterization techniques. The differential scanning calorimetry analysis shows the evidence of reactions via exothermic peak transition at ~170 °C temperature. Dynamic mechanical thermal analysis and stress–strain analysis suggest improvement in the initial physiochemical attributes of elastomer. The equilibrium swelling study quantifies the network structure that formed during the spontaneous reactions induced by graphene. Nuclear magnetic resonance (1H‐NMR) and Raman spectroscopic analysis suggest clear deviation in the pristine chemical structure of cis‐1,4‐PB elastomer and graphene, respectively. We believe that the spontaneous chemical reactions led to the formation of a three‐dimensional network within the PB elastomer. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48209.

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Polymer Nanocomposites: Synthesis, Microstructure, and Properties

Cited by 25 publications

References 44 publications

A Review on the Corrosion Behaviour of Nanocoatings on Metallic Substrates

A Review on the Corrosion Behaviour of Nanocoatings on Metallic Substrates

Rheological and electrical percolation thresholds of multi‐walled carbon nanotube/in‐situ polymerised Nylon12 nanocomposites

Temperature‐triggered three‐dimensional network formation in graphene–polybutadiene nanocomposite

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