Molecular Modeling of Epoxy Resin Crosslinking Experimentally Validated by Near-Infrared Spectroscopy

Unger, R.; Braun, Ulrike; Fankhänel, Johannes; Daum, B.; Arash, Behrouz; Rolfes, Raimund

doi:10.1007/978-3-030-68523-2_14

Cited by 1 publication

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned in the introduction, FSC was successfully employed by Unger et al to investigate PEEK- and PET-electrospun fibers. , However, the structural integrity of the fibers was not fully preserved during these measurements. For the system considered here, the fibers were removed from the chip sensor after the experiment and investigated by optical microscopy and SEM (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…For details, the readers are referred to ref . Detailed cross-scale information on the boehmite/epoxy system can be found elsewhere. − Examples for nanocomposites based on thermoplastics and boehmite are discussed elsewhere. , …”

Section: Introductionmentioning

confidence: 99%

“…For this reason, new protocols allowing for a reliable study of the thermal properties for electrospun fibers and their nanocomposites have been developed. One approach is reported by Thomas et al, where the thermal properties of polyethylene terephthalate electrospun fibers were measured by fast scanning calorimetry (FSC), which is based on a chip approach . In that study, the fibers were deposited on copper grids used for transmission electron microscopy (TEM) to act as a support .…”

Section: Introductionmentioning

confidence: 99%

“…One approach is reported by Thomas et al, where the thermal properties of polyethylene terephthalate electrospun fibers were measured by fast scanning calorimetry (FSC), which is based on a chip approach . In that study, the fibers were deposited on copper grids used for transmission electron microscopy (TEM) to act as a support . This procedure improved the thermal contact of the fibers with the calorimeter chip, while the integrity of the fibers was preserved by decoupling the kinetics of the glass transition from that of the flow in the melt .…”

Section: Introductionmentioning

confidence: 99%

“…16 In that study, the fibers were deposited on copper grids used for transmission electron microscopy (TEM) to act as a support. 16 This procedure improved the thermal contact of the fibers with the calorimeter chip, while the integrity of the fibers was preserved by decoupling the kinetics of the glass transition from that of the flow in the melt. 16 Melt electrospun fibers of polyether ether ketone were also investigated by placing fiber fragments directly on the FSC chip.…”

Section: ■ Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Electrospun Nanocomposite Fibers of Polycarbonate- and Taurine-Modified Boehmite Nanoparticles: What Can Be Learned from Structural and Thermal Investigations?

Murillo

Szymoniak

Smales

et al. 2021

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Though the reinforcing properties of inorganic particles in thermosetting nanocomposites have been exploited, the integration of nanoparticles continues to be challenging in terms of their homogeneous distribution and their manipulation, which can contribute to occupational hazards. Due to second encapsulations of nanoparticles, electrospun nanocomposite fibers containing nanoparticles might be an alternative for overcoming these issues, as the nonwoven fibers contain nanoparticles allowing for safer manipulation. Here, the morphology and the thermal properties of electrospun polycarbonate fibers containing taurinemodified boehmite nanoparticles (BNPs) are investigated by means of small-and wide-angle X-ray scattering as well as fast scanning and temperature-modulated fast scanning calorimetry for the first time. The latter techniques allow the investigation of the thermal properties of single fibers at heating rates of up to 10 4 K s −1 keeping their structure intact. An analysis of the scattering data reveals a porous structure of the fibers. The porous structure is quantified regarding the pore volume and the pore size. A constant amount of aggregation is found even for the highly BNP-loaded fibers. Thermal analysis of the fibers reveals a rigid amorphous fraction (RAF), where it is known that the RAF determines the properties of a nanocomposite to a large extent. For the fibers, the RAF amounts up to 40 wt %, which is essentially higher compared to equally formulated PC/BNP composite cast films. The RAF, in the case of fibers, is not only due to the presence of particles in the polymer but also due to the orientation effects induced by the electrospinning process.

show abstract

Section: Resultsmentioning

confidence: 99%