Quantitative Morphological Analysis of Carbon Black in Polymers used in Laser Transmission Welding

Wang, C. Y.; Bates, P. J.; Aghamirian, M.; Zak, G.; Nicholls, R. V. V.

doi:10.1007/bf03266564

Cited by 6 publications

(7 citation statements)

References 9 publications

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“…8, and the densities of PC and CB (2250 kg/m 3 from Columbia (2007)). This estimated diameter of 98 nm is approximately 50% larger than those measured by Wang et al (2007). Differences between the predicted and measured values may be caused by the distribution of CB particle diameters as well as shape non-uniformities.…”

Section: Results and Analysismentioning

confidence: 49%

“…This is largely attributed to the smaller dispersed CB aggregates in PC as well as PC's higher density. The CB dimensions of the materials used in this study have been measured by Wang et al (2007). The diameters of CB aggregates were found to be in the range of 10-60 and 20-160 nm for PC and PA6, respectively.…”

Section: Results and Analysismentioning

confidence: 99%

“…(4) directly because accurate information on the size of nano-sized CB is not easily obtained. Wang et al (2007) describe a number of techniques that can be used to measure this dimensional information. Theoretically, Eq.…”

Section: Literature Reviewmentioning

confidence: 99%

See 2 more Smart Citations

Effect of carbon black on light transmission in laser welding of thermoplastics

Chen

Zak

Bates

2011

Journal of Materials Processing Technology

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Section: Results and Analysismentioning

confidence: 49%

Section: Results and Analysismentioning

confidence: 99%

See 1 more Smart Citation

Effect of carbon black on light transmission in laser welding of thermoplastics

Chen

Zak

Bates

2011

Journal of Materials Processing Technology

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“…The perimeter and aggregate size of all CB aggregates dispersed in four composites are plotted in a single graph in Figure 6 , which shows a scaling relationship (

, where P and A are the perimeter and particle aggregate size respectively, and D p is the fractal dimension [ 25 ]) ( Figure 6 ). The CB aggregates in the binary composites (B_CB4, H_CB4) set into a master plot having a relationship of

(D p /2 = 0.6).…”

Section: Resultsmentioning

confidence: 99%

Effect of Melt-Compounding Protocol on Self-Aggregation and Percolation in a Ternary Composite

et al. 2020

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A ternary composite of poly(lactic acid) (PLA), poly(caprolactone) (PCL), and carbon black (CB) shows the PCL-induced CB self-aggregation and percolation formation when the amount of the PCL phase as the secondary phase is as small as the amount of CB. Furthermore, when the drop size of the PCL phase becomes smaller, the ternary composite forms a percolation of high order structure, resulting in a remarkable enhancement of the electrical conductivity (~4 × 10−2 S/m with 4 wt.% CB). To further control the percolation structure, the composite fabrication is controlled by splitting a typical single-step mixing process into two steps, focusing on the dispersion of the secondary PCL phase and the CB particles separately. Under the single-step mixing protocol, the ternary composite shows a structure with greater CB aggregation in the form of a high aspect ratio and large aggregates (aggregate perimeter~aggregate size 0.7). Meanwhile, the two-step mixing process causes the CB aggregates to expand and create a higher structure (aggregate perimeter~aggregate size 0.8). The reduced size of the secondary phase under a mixing condition with high shear force prior to the addition of CB provides a larger interfacial area for CB to diffuse into the PCL phase during the subsequent mixing step, resulting in a further expansion of CB aggregation throughout the composite. The particle percolation of such a high order structure is attributed to high storage modulus (G′), high Young’s modulus, high dielectric loss (ε″), and negative–positive switching of dielectric constant at high frequency (of 103 Hz) of composite.

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“…A technique for quantifying the carbon black morphology in laser welding applications was developed by Wang [54]. In his study, transmission electron microscopy (TEM) followed by image processing were used to assess the microstructure of the CB.…”

Section: The Effects Of Absorbing Materialsmentioning

confidence: 99%