Selective localisation of multi walled carbon nanotubes in polypropylene/natural rubber blends to reduce the percolation threshold

Nair, Sharika T.; Vijayan, P. Poornima; Xavier, Priti; Bose, Suryasarathi; George, Soney C.; Thomas, Sabu

doi:10.1016/j.compscitech.2015.04.021

Cited by 94 publications

(18 citation statements)

References 45 publications

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“…In the case of 30 wt %, at low frequency, the complex behavior began to leave the Newtonian behavior, because of the increase of the polymer chain mobility restrictions. This fact is due to the transition from liquid-like to solid-like viscoelastic behavior, caused by the particle-particle interactions that dominate over the polymer-filler interactions, forming an incipient interconnected network of CATAS [27,28]. In general, even large amounts of these nanofillers do not drastically change the rheological characteristics of the melt.…”

Section: Characteristics Of Composites Peek/calcium Terephthalate Saltsmentioning

confidence: 99%

A Novel Class of Cost Effective and High Performance Composites Based on Terephthalate Salts Reinforced Polyether Ether Ketone

et al. 2019

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Poly(ether ether ketone) (PEEK)-based nanocomposites have been realized with incorporation (0–30 wt %) of anhydrous calcium terephthalate salts (CATAS), synthetized by reaction of terephtalic acid with the metal (Ca) oxide, by means of a melt processing. Their structure, morphology, thermal, and mechanical properties have been investigated. Scanning electron microscopy observations confirmed homogeneous dispersion of nanometer-sized fillers and a toughened fracture morphology even at the higher content, while thermal characterization confirmed an unvaried thermal stability and unmodified crystalline structure of the reference PEEK matrix. A negligible nucleating effect was evidenced, while a blocking effect of the amorphous phase fraction provide composites with increased stiffness, confirmed by enhanced values of G’ and shifts of glass transition peak to higher temperatures, for restriction in chain mobility imposed by CATAS. The proposed solutions aimed to enlarge the application range of high performance costly PEEK-based composites, by using thermally stable nanofillers with limited costs and easily controllable synthesis phase.

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Section: Characteristics Of Composites Peek/calcium Terephthalate Saltsmentioning

confidence: 99%

A Novel Class of Cost Effective and High Performance Composites Based on Terephthalate Salts Reinforced Polyether Ether Ketone

et al. 2019

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“…They investigated the spectral, mechanical and frequency-dependence characteristics in order to confirm the documented enhancements [4]. Tang et al conducted a degradation study for crumb rubber modifier with the production of terminal blend asphalt binder [5]. Kim et al documented enhancement in the thermomechanical properties of sponge EPDM rubber composites [6].…”

Section: Introductionmentioning

confidence: 99%

“…Single-walled CNTs (SWCNTs) are of particular interest, as they show superior electrical, thermal and mechanical properties. They also show potential as a reinforcement in blended nanocomposites, in which they greatly enhance mechanical, thermomechanical, thermal stability and barrier properties [5,6]. Meanwhile, the development of sponge structures in elastomers can be achieved by introducing a gaseous phase that evolves from blowing agents used in vulcanisation.…”

Section: Introductionmentioning

confidence: 99%

Development of SWCNTs-reinforced EPDM/SBR matrices for shock absorbing applications

Bahadar

Zwawi

2020

Mater. Res. Express

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The present research investigates the effects of various concentrations of single-walled carbon nanotubes (SWCNTs) on the viscoelastic and thermomechanical characteristics of styrenebutadiene/ethylene propylene diene polymer (SBR/EPDM) blended polymeric matrices (60:40). Standard elastomeric methods are used to synthesise SWCNTs-reinforced EPDM/SBR nanocomposite blends. The results reveal that high SWCNTs concentrations offer remarkable thermal stability enhancement. SWCNTs reinforced with 0.6 mass% EPDM/SBR become 20% harder, with Tangent Delta values boosted by 70% with maximum cross-linking, elongation enhanced by 38% and tensile strength improved by 35%. With the 38% elongation enhancement, storage modulus is increased by 80%, whereas compressive strain is reduced by 20%. The planned hybrid nanocomposites exhibit viscoelastic characteristics against applied shock, in which the viscous component is associated with spongy structure, whereas the elastic component is associated with spring-like response.

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“…The dispersion of conductive nanofillers in the polymer matrix is one of the most promising methods to reduce the percolation threshold. However, the most serious problem encountered with these conductive nanocomposites is that they are very costly because the percolation threshold of these nanoparticles is relatively high . Some researchers showed that high nanoparticles contents could deteriorate the mechanical properties of the final product by making the nanocomposites extraordinary brittle and prone to fracture.…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic vulcanizate nanocomposites based on polyethylene/reclaimed rubber: A correlation between carbon nanotube dispersion state and electrical percolation threshold

Vahidifar

Esmizadeh

Elahi

et al. 2019

J of Applied Polymer Sci

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A three‐step melt blending process was utilized to produce linear low‐density polyethylene (LLDPE)/reclaimed rubber (RR)/carbon nanotube (CNT) nanocomposites in the presence of maleic anhydride grafted polyethylene as a compatibilizer. The effect of LLDPE/RR ratio and CNT content on the morphological, thermal, mechanical, and rheological behavior of these dynamically vulcanized LLDPE/RR nanocomposites were investigated. The morphological study showed that the RR was dispersed in the LLDPE matrix, and CNT addition led to an improved morphology as smaller RR sizes inside LLDPE were observed. The mechanical results revealed that increasing the RR content decreased the hardness, modulus of elasticity, and elongation at break while CNT improved the tensile properties and other mechanical properties. The differential scanning calorimeter analysis showed that the CNT improved the LLDPE crystallization by acting as nucleation agents. Dynamic mechanical analysis showed higher storage modulus and lower loss factor as compared to the neat blend due to mobility restrictions of the polymer chains induced by the presence of CNT. For the conditions studied, the electrical percolation threshold was found to occur at a very low CNT concentration (about 1 wt %) compared to the literature because of the specific structure produced leading to CNT residing in the LLDPE matrix and at the interface between both polymeric phases. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47795.

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Selective localisation of multi walled carbon nanotubes in polypropylene/natural rubber blends to reduce the percolation threshold

Cited by 94 publications

References 45 publications

A Novel Class of Cost Effective and High Performance Composites Based on Terephthalate Salts Reinforced Polyether Ether Ketone

A Novel Class of Cost Effective and High Performance Composites Based on Terephthalate Salts Reinforced Polyether Ether Ketone

Development of SWCNTs-reinforced EPDM/SBR matrices for shock absorbing applications

Thermoplastic vulcanizate nanocomposites based on polyethylene/reclaimed rubber: A correlation between carbon nanotube dispersion state and electrical percolation threshold

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