Thermal/Electrical Properties and Texture of Carbon Black PC Polymer Composites near the Electrical Percolation Threshold

Brunella, Valentina Giovanna; Rossatto, Beatrice Gaia; Mastropasqua, Chiara; Cesano, Federico; Scarano, Domenica

doi:10.3390/jcs5080212

Cited by 9 publications

(12 citation statements)

References 44 publications

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“…Thus, CB particles do not notably impact the resistance of semicrystalline polymers to heatrelated changes under pyrolysis conditions, consistent with previous findings. 35,36 Furthermore, an increase in carbon black (CB) loading in the composites led to a higher residual mass compared to that of the pristine polymers. An approximate determination of the CB content can be achieved by comparing the residual mass obtained in pyrolysis thermograms to that of the pristine polymer, serving as a reference.…”

Section: Thermal Properties Of Polymers and Compositesmentioning

confidence: 99%

The Macromolecular Design of Poly(styrene-isoprene-styrene) (SIS) Copolymers Defines their Performance in Flexible Electrothermal Composite Heaters

Dedduwakumara,

Barner-Kowollik,

Dubal

et al. 2024

ACS Appl. Mater. Interfaces

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Electric cars are desirable for their environmental and economic benefits yet face limitations in range in cold weather due to the increased energy demands for cabin heating. To provide efficient heating for vehicles, flexible composite electrothermal heaters offer a viable solution owing to their lightweight design, efficiency, and adaptability for use within and beyond vehicle interiors. The current study aims to improve electrothermal heater stability and performance by understanding the impact of the polymer structure on composite properties. We explore how the presence and molecular structure of olefinic bonds within the polyisoprene block of styrenic triblock copolymers affect thermal stability and performance. Composite electrothermal heaters were fabricated by dispersing carbon black (CB) as the heating material in three triblock copolymer matrices, poly(styrene-1,4-isoprene-styrene) (1,4-SIS), poly(styrene-3,4-isoprene-styrene) (3,4-SIS), and its hydrogenated version poly(styrene-ethylene-propylene-styrene) (SEPS). The chemical structure and thermal properties of each copolymer were linked to electrothermal performance measurements of composite heaters to establish structure−function relationships. Notably, 3,4-SIS with 28 wt % CB demonstrated the highest thermal and electrical conductivity, resulting in uniform heat distribution. The outcomes unambiguously demonstrate that the olefinic structure of SIS copolymers enhances the electric and thermal conductivity, leading to enhanced electrothermal performance of prototype heaters compared to that of the hydrogenated copolymer.

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Section: Thermal Properties Of Polymers and Compositesmentioning

confidence: 99%

The Macromolecular Design of Poly(styrene-isoprene-styrene) (SIS) Copolymers Defines their Performance in Flexible Electrothermal Composite Heaters

Dedduwakumara,

Barner-Kowollik,

Dubal

et al. 2024

ACS Appl. Mater. Interfaces

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“…The reinforcement of CB‐loaded crosslinked rubber is primarily attributed to the nanoscale particle size, high surface area, and high specific surface activity that foster robust interactions between the rubber and CB 51 . CB can be applied to many polymers such as polyvinyl chloride, 52 polycarbonate, 53 polyvinyl alcohol, 54 neoprene rubber, 55 and natural rubber (NR) 56 . In addition, the annual global output of CB is reportedly 15 million metric tons, and vehicle tires account for 73% of that production, while the remaining 20% is used in other rubber products 48 .…”

Section: Conventional Fillers In Polymersmentioning

confidence: 99%

Waste material fly ash as an alternative filler for elastomers

Yangthong

Buaksuntear

Suethao

et al. 2023

Polymer Engineering & Sci

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Fly ash (FA), a by‐product of the power generation industry, can potentially be used as a filler in polymer products. Particularly, FA has been investigated as an alternative filler to partially or fully replace commercial fillers in polymer composites. This mini‐review discusses the fundamental properties of FA, environmental pollution from commercial fillers, and the performance of FA in polymers. The properties of FA‐loaded polymer composites are discussed, including the morphological, rheological, mechanical, and thermal properties. This review highlights the potential methods and challenges for substituting, or replacing, commercial fillers in various polymers such as natural rubber (NR), epoxidized NR, epoxy, styrene‐butadiene rubber (SBR), NR/SBR blends, polyethylene, polypropylene, and polyester.

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“…% of CB can be explained, considering that the electrical percolation is achieved. Furthermore, the filler aggregates are expected to be preferentially localized in the amorphous regions of semicrystallinepolymers [42] (in fact, CB is more uniformly dispersed in the matrix of amorphous polymers [43]). In this regard, by adding CB beyond this critical point, the conductivity will not be remarkably affected by the amorphous phase distribution [44], due to the fact that the resulting percolation paths are defined.…”

Section: Electrical Properties At 25 • Cmentioning

confidence: 99%

Thermal, Morphological, Electrical Properties and Touch-Sensor Application of Conductive Carbon Black-Filled Polyamide Composites

et al. 2021

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Polyamide 66 (PA66) is a well-known engineering thermoplastic polymer, primarily employed in polymer composites with fillers and additives of different nature and dimensionality (1D, 2D and 3D) used as alternatives to metals in various technological applications. In this work, carbon black (CB), a conductive nanofiller, was used to reinforce the PA66 polymer in the 9–27 wt. % CB loading range. The reason for choosing CB was intrinsically associated with its nature: a nanostructured carbon filler, whose agglomeration characteristics affect the electrical properties of the polymer composites. Crystallinity, phase composition, thermal behaviour, morphology, microstructure, and electrical conductivity, which are all properties engendered by nanofiller dispersion in the polymer, were investigated using thermal analyses (thermogravimetry and differential scanning calorimetry), microscopies (scanning electron and atomic force microscopies), and electrical conductivity measurements. Interestingly, direct current (DC) electrical measurements and conductive-AFM mapping through the samples enable visualization of the percolation paths and the ability of CB nanoparticles to form aggregates that work as conductive electrical pathways beyond the electrical percolation threshold. This finding provides the opportunities to investigate the degree of filler dispersion occurring during the transformation processes, while the results of the electrical properties also contribute to enabling the use of such conductive composites in sensor and device applications. In this regard, the results presented in this paper provide evidence that conductive carbon-filled polymer composites can work as touch sensors when they are connected with conventional low-power electronics and controlled by inexpensive and commercially available microcontrollers.

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Thermal/Electrical Properties and Texture of Carbon Black PC Polymer Composites near the Electrical Percolation Threshold

Cited by 9 publications

References 44 publications

The Macromolecular Design of Poly(styrene-isoprene-styrene) (SIS) Copolymers Defines their Performance in Flexible Electrothermal Composite Heaters

The Macromolecular Design of Poly(styrene-isoprene-styrene) (SIS) Copolymers Defines their Performance in Flexible Electrothermal Composite Heaters

Waste material fly ash as an alternative filler for elastomers

Thermal, Morphological, Electrical Properties and Touch-Sensor Application of Conductive Carbon Black-Filled Polyamide Composites

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