The effect of flow on the physical properties of polyurethane/carbon nanotubes nanocomposites: Repercussions on their use as electrically conductive Hot-Melt adhesives

2014 ◽  
Vol 36 (4) ◽  
pp. 704-712 ◽  
Author(s):  
M. Landa ◽  
M. Fernández ◽  
M.E. Muñoz ◽  
A. Santamaría
Keyword(s):  
Carbon Nanotubes ◽  
Physical Properties ◽  
Electrically Conductive ◽  
Melt Adhesives ◽  
Hot Melt

TACTIX 740 and TACTIX 741 RESINS

Alloy Digest ◽  
1991 ◽  
Vol 40 (12) ◽  
Keyword(s):  
Physical Properties ◽  
Acetone Solution ◽  
Chemical Company ◽  
High Durability ◽  
Melt Adhesives ◽  
Hot Melt

Abstract TACTIX 740 resin offers high durability for hot melt adhesives. TACTIX 741, an acetone solution of TACTIX 740, is designed for composites prepared by solution prepregging. This datasheet provides information on composition and physical properties. Filing Code: P-32. Producer or source: The Dow Chemical Company, Dow Plastics.

scholarly journals Hot-melt adhesives based on co-polyamide and multiwalled carbon nanotubes

2017 ◽  
Vol 135 (11) ◽  
pp. 45999 ◽  
Author(s):  
Paulina Latko-Durałek ◽  
Jan Macutkevic ◽  
Christopher Kay ◽  
Anna Boczkowska ◽  
Tony McNally
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon ◽  
Melt Adhesives ◽  
Hot Melt

scholarly journals Relationship between Viscosity, Microstructure and Electrical Conductivity in Copolyamide Hot Melt Adhesives Containing Carbon Nanotubes

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4469
Author(s):  
Paulina Latko-Durałek ◽  
Rafał Kozera ◽  
Jan Macutkevič ◽  
Kamil Dydek ◽  
Anna Boczkowska
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Lightning Strike ◽  
Real Problem ◽  
Conductive Adhesives ◽  
Electrically Conductive ◽  
Thermoset Composites ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Hot Melt

The polymeric adhesive used for the bonding of thermoplastic and thermoset composites forms an insulating layer which causes a real problem for lightning strike protection. In order to make that interlayer electrically conductive, we studied a new group of electrically conductive adhesives based on hot melt copolyamides and multi-walled carbon nanotubes fabricated by the extrusion method. The purpose of this work was to test four types of hot melts to determine the effect of their viscosity on the dispersion of 7 wt % multi-walled carbon nanotubes and electrical conductivity. It was found that the dispersion of multi-walled carbon nanotubes, understood as the amount of the agglomerates in the copolyamide matrix, is not dependent on the level of the viscosity of the polymer. However, the electrical conductivity, analyzed by four-probe method and dielectric spectroscopy, increases when the number of carbon nanotube agglomerates decreases, with the highest value achieved being 0.67 S/m. The inclusion of 7 wt % multi-walled carbon nanotubes into each copolyamide improved their thermal stability and changed their melting points by only a few degrees. The addition of carbon nanotubes makes the adhesive’s surface more hydrophilic or hydrophobic depending on the type of copolyamide used.

Characterization of thermoplastic nonwovens of copolyamide hot melt adhesives filled with carbon nanotubes produced by melt-blowing method

2020 ◽  
pp. 152808372091021
Author(s):  
Paulina Latko-Durałek ◽  
Paweł Durałek ◽  
Anna Boczkowska ◽  
Rafał Kozera ◽  
Małgorzata Wróblewska ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Melt Blowing ◽  
Melt Adhesives ◽  
Hot Melt

scholarly journals Fibers of Thermoplastic Copolyamides with Carbon Nanotubes for Electromagnetic Shielding Applications

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5699
Author(s):  
Paulina Latko-Durałek ◽  
Povilas Bertasius ◽  
Jan Macutkevic ◽  
Juras Banys ◽  
Anna Boczkowska
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Properties ◽  
Electromagnetic Shielding ◽  
Broadband Dielectric Spectroscopy ◽  
Degree Of Orientation ◽  
Multi Walled Carbon Nanotubes ◽  
Nanocomposite Fibers ◽  
Melt Adhesives ◽  
Walled Carbon Nanotubes ◽  
Hot Melt

Polymer composites containing carbon nanofillers are extensively developed for electromagnetic shielding applications, where lightweight and flexible materials are required. One example of the microwave absorbers can be thermoplastic fibers fabricated from copolyamide hot melt adhesives and 7 wt % of multi-walled carbon nanotubes, as presented in this paper. A broadband dielectric spectroscopy confirmed that the addition of carbon nanotubes significantly increased microwave electrical properties of the thin (diameter about 100 μm) thermoplastic fibers. Moreover, the dielectric properties are improved for the thicker fibers, and they are almost stable at the frequency range 26–40 GHz and not dependent on the temperature. The variances in the dielectric properties of the fibers are associated with the degree of orientation of carbon nanotubes and the presence of bundles, which were examined using a high-resolution scanning microscope. Analyzing the mechanical properties of the nanocomposite fibers, as an effect of the carbon nanotubes addition, an improvement in the stiffness of the fibers was observed, together with a decrease in the fibers’ elongation and tensile strength.

scholarly journals Electrically Conductive Networks from Hybrids of Carbon Nanotubes and Graphene Created by Laser Radiation

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1875
Author(s):  
Alexander Yu. Gerasimenko ◽  
Artem V. Kuksin ◽  
Yury P. Shaman ◽  
Evgeny P. Kitsyuk ◽  
Yulia O. Fedorova ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Laser Irradiation ◽  
Flexible Electronics ◽  
Threshold Energy ◽  
Wavelength Region ◽  
Hybrid Nanostructures ◽  
Graphene Sheets ◽  
Electrically Conductive ◽  
Walled Carbon Nanotubes

A technology for the formation of electrically conductive nanostructures from single-walled carbon nanotubes (SWCNT), multi-walled carbon nanotubes (MWCNT), and their hybrids with reduced graphene oxide (rGO) on Si substrate has been developed. Under the action of single pulses of laser irradiation, nanowelding of SWCNT and MWCNT nanotubes with graphene sheets was obtained. Dependences of electromagnetic wave absorption by films of short and long nanotubes with subnanometer and nanometer diameters on wavelength are calculated. It was determined from dependences that absorption maxima of various types of nanotubes are in the wavelength region of about 266 nm. It was found that contact between nanotube and graphene was formed in time up to 400 fs. Formation of networks of SWCNT/MWCNT and their hybrids with rGO at threshold energy densities of 0.3/0.5 J/cm2 is shown. With an increase in energy density above the threshold value, formation of amorphous carbon nanoinclusions on the surface of nanotubes was demonstrated. For all films, except the MWCNT film, an increase in defectiveness after laser irradiation was obtained, which is associated with appearance of C–C bonds with neighboring nanotubes or graphene sheets. CNTs played the role of bridges connecting graphene sheets. Laser-synthesized hybrid nanostructures demonstrated the highest hardness compared to pure nanotubes. Maximum hardness (52.7 GPa) was obtained for MWCNT/rGO topology. Regularity of an increase in electrical conductivity of nanostructures after laser irradiation has been established for films made of all nanomaterials. Hybrid structures of nanotubes and graphene sheets have the highest electrical conductivity compared to networks of pure nanotubes. Maximum electrical conductivity was obtained for MWCNT/rGO hybrid structure (~22.6 kS/m). Networks of nanotubes and CNT/rGO hybrids can be used to form strong electrically conductive interconnections in nanoelectronics, as well as to create components for flexible electronics and bioelectronics, including intelligent wearable devices (IWDs).

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