Carbon-based nanofillers/Poly(butylene terephthalate): thermal, dielectric, electrical and rheological properties

Yin, Huajie; Dittrich, Bettina; Farooq, Muhammad; Kerling, Sabrina; Wartig, Karen-Alessa; Hofmann, Daniel; Huth, Christian; Okolieocha, Chimezie; Altstädt, Volker; Schönhals, Andreas; Schartel, Bernhard

doi:10.1007/s10965-015-0785-4

Cited by 15 publications

(13 citation statements)

References 64 publications

(72 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…on PA6/PA66—CNTs nanocomposites can be made. The electrical percolation threshold was approximately the same, and similar resistivity values were obtained, but in Krause's work, the tests were performed at an applied voltage of 40 V. In the article by Yin et al . on PBT‐based nanocomposites, it was demonstrated how with CNTs addition it is possible to reach the percolation threshold at low concentration (0.5 wt%), but the resistivity value obtained above this critical volume fraction is similar to that reported in the present investigation.…”

Section: Resultssupporting

confidence: 89%

Synergistic effects of carbon black and carbon nanotubes on the electrical resistivity of poly(butylene‐terephthalate) nanocomposites

2017

View full text Add to dashboard Cite

In this study, novel electrically conductive polymeric nanocomposites based on polybutylene terephthalate (PBT) filled with commercial carbon black (CB) and carbon nanotubes (CNTs) at different relative ratios have been investigated. Field emission scanning electron microscope (FESEM) analysis revealed how a good nanofiller dispersion was obtained both by introducing CB and CNT. Melt flow index measurements highlighted that the processability of the nanocomposites was heavily compromised at elevated filler amounts, and the viscosity percolation threshold was established at 3 wt% for CNTs and between 6 and 10 wt% for CB nanocomposites.Differential scanning calorimetry (DSC) measurements evidenced how the presence of CNT slightly increased the glass transition temperature of the materials, and an increase of 12°C of the crystallization temperature was obtained with a CNT amount of 6 wt%. Also the crystalline fraction was increased upon CNT addition. Electrical resistivity measurements evidenced that the most interesting results were obtained for nanocomposites with a total filler content of 6 wt% and a CNT/CB relative amount equal to 2:1. The synergistic effect obtained with the combination of both nanofillers allowed the achievement of a rapid surface heating through Joule effect even at applied voltages of 2 V.

show abstract

Section: Resultssupporting

confidence: 89%

Synergistic effects of carbon black and carbon nanotubes on the electrical resistivity of poly(butylene‐terephthalate) nanocomposites

2017

View full text Add to dashboard Cite

show abstract

“…The function of the nanoparticles as nucleating agents gradually reduced and the crystallinity of the composite system began to reduce. This is consistent with the crystallization rule of carbon-based nanofillers/PBT composites studied by Huajie Yin et al [ 26 ].…”

Section: Resultssupporting

confidence: 92%

Study on the Synergetic Fire-Retardant Effect of Nano-Sb2O3 in PBT Matrix

Niu

Yang

et al. 2018

Materials

View full text Add to dashboard Cite

Nano-Sb2O3 has excellent synergistic flame-retardant effects. It can effectively improve the comprehensive physical and mechanical properties of composites, reduce the use of flame retardants, save resources, and protect the environment. In this work, nanocomposites specimens were prepared by the melt-blending method. The thermal stability, mechanical properties, and flame retardancy of a nano-Sb2O3–brominated epoxy resin (BEO)–poly(butylene terephthalate) (PBT) composite were analyzed, using TGA and differential scanning calorimetry (DSC), coupled with EDX analysis, tensile testing, cone calorimeter tests, as well as scanning electron microscopy (SEM) and flammability tests (limiting oxygen index (LOI), UL94). SEM observations showed that the nano-Sb2O3 particles were homogeneously distributed within the PBT matrix, and the thermal stability of PBT was improved. Moreover, the degree of crystallinity and the tensile strength were improved, as a result of the superior dispersion and interfacial interactions between nano-Sb2O3 and PBT. At the same time, the limiting oxygen index and flame-retardant grade were increased as the nano-Sb2O3 content increased. The results from the cone calorimeter test showed that the peak heat release rate (PHRR), total heat release rate (THR), peak carbon dioxide production (PCO2P), and peak carbon monoxide production (PCOP) of the nanocomposites were obviously reduced, compared to those of the neat PBT matrix. Meanwhile, the SEM–energy dispersive spectrometry (EDX) analysis of the residues indicated that a higher amount of C element was left, thus the charring layer of the nanocomposites was compact. This showed that nano-Sb2O3 could promote the degradation and charring of the PBT matrix, improving thermal stability and flame retardation.

show abstract

“…Electrically conductive composite materials currently play a systematically growing role for new technologies and products. In order to obtain conductive polymer composites (CPCs), various carbon fillers, such as carbon nanotubes (CNTs), carbon black (CB), and graphite (G), are used by exploiting the phenomenon of filler percolation [1,2,3,4,5,6,7,8]. Depending on the application, there are specific requirements concerning conductivity values [1], but the direction of conductance may also be of interest, meaning that different values may be required for the in-plane or through-plane of the sample or component [9].…”

Section: Introductionmentioning

confidence: 99%

Direction Dependent Electrical Conductivity of Polymer/Carbon Filler Composites

et al. 2019

View full text Add to dashboard Cite

The method of measuring electrical volume resistivity in different directions was applied to characterize the filler orientation in melt mixed polymer composites containing different carbon fillers. For this purpose, various kinds of fillers with different geometries and aspect ratios were selected, namely carbon black (CB), graphite (G) and expanded graphite (EG), branched multiwalled carbon nanotubes (b-MWCNTs), non-branched multiwalled carbon nanotubes (MWCNTs), and single-walled carbon nanotubes (SWCNTs). As it is well known that the shaping process also plays an important role in the achieved electrical properties, this study compares results for compression molded plates with random filler orientations in the plane as well as extruded films, which have, moreover, conductivity differences between extrusion direction and perpendicular to the plane. Additionally, the polymer matrix type (poly (vinylidene fluoride) (PVDF), acrylonitrile butadiene styrene (ABS), polyamide 6 (PA6)) and filler concentration were varied. For the electrical measurements, a device able to measure the electrical conductivity in two directions was developed and constructed. The filler orientation was analyzed using the ratio σin/th calculated as in-plane conductivity σin-plane (σin) divided by through-plane conductivity σthrough-plane (σth). The ratio σin/th is expected to increase with more pronounced filler orientation in the processing direction. In the extruded films, alignment within the plane was assigned by dividing the in-plane conductivity in the extrusion direction (x) by the in-plane conductivity perpendicular to the extrusion direction (y). The conductivity ratios depend on filler type and concentration and are higher the higher the filler aspect ratio and the closer the filler content is to the percolation concentration.

show abstract

Carbon-based nanofillers/Poly(butylene terephthalate): thermal, dielectric, electrical and rheological properties

Cited by 15 publications

References 64 publications

Synergistic effects of carbon black and carbon nanotubes on the electrical resistivity of poly(butylene‐terephthalate) nanocomposites

Synergistic effects of carbon black and carbon nanotubes on the electrical resistivity of poly(butylene‐terephthalate) nanocomposites

Study on the Synergetic Fire-Retardant Effect of Nano-Sb2O3 in PBT Matrix

Direction Dependent Electrical Conductivity of Polymer/Carbon Filler Composites

Contact Info

Product

Resources

About