@article{ClaireJuergenJuergen, author = {Claire, Strasser and J{\"u}rgen, Blumm and J{\"u}rgen, Hartmann}, title = {Characterizing Vitrification by Thermal Analysis During Curing of an Epoxy-Amine System}, series = {Journal of Applied Polymer Science}, volume = {142}, journal = {Journal of Applied Polymer Science}, number = {26}, doi = {10.1002/app.57077}, pages = {e57077}, abstract = {During curing, the glass transition temperature of thermosets increases with conversion. When the process is carried out isothermally or at very low heating rates, the glass transition temperature of the resin may rise faster than the material temperature, eventually reaching the latter. This leads to vitrification: The partially cured resin enters the glassy state. The reaction rate drops drastically because it is no longer chemically controlled, but diffusion controlled. As a result, the final product may not be completely cured, which has a severe impact on its mechanical and thermal quality and is therefore crucial for the process. The concept of diffusion-controlled kinetics during the curing reaction has been widely reported and documented. However, the systematic study of the influence of vitrification on specific heat, dielectric properties, and/or thermal diffusivity during crosslinking under isothermal and dynamic conditions has never been performed so far. This work investigates the impact of vitrification on the specific heat, ionic conductivity, and thermal diffusivity during dynamic and isothermal curing of an epoxy-amine system.}, language = {en} } @book{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Quantitative Bestimmung lokaler thermischer Eigenschaften in polykristallinem Diamant}, publisher = {K{\"o}ster}, address = {Berlin}, language = {de} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Radiometrie im UV und IR}, address = {Berlin}, language = {de} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Modernste Radiometrie und Photometrie}, address = {Berlin}, language = {de} } @inproceedings{HartmannAnhaltHollandt, author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Hollandt, J{\"o}rg}, title = {Nearly as hot as the sun: High-temperature fixed-points for radiation thermometry and radiometry}, address = {St. Paul (USA)}, language = {en} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Photometrie und Radiometrie}, address = {Berlin}, language = {de} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Legal metrology on clinical thermometers in the European Union}, address = {Tokyo (Japan)}, language = {en} } @inproceedings{Hartmann, author = {Hartmann, J{\"u}rgen}, title = {Radiation thermometry at PTB}, address = {Tokyo (Japan)}, language = {en} } @inproceedings{HartmannReichling, author = {Hartmann, J{\"u}rgen and Reichling, M.}, title = {Complete Characterisation of local thermal heat transfer in high quality chemical vapour deposited diamond}, address = {Rom (Italien)}, language = {en} } @inproceedings{HartmannReichling, author = {Hartmann, J{\"u}rgen and Reichling, M.}, title = {Microscopic heat transfer in high quality polycrystalline diamond}, address = {Ustron (Polen)}, language = {en} }