TY - JOUR A1 - Claire, Strasser A1 - Jürgen, Blumm A1 - Jürgen, Hartmann T1 - Characterizing Vitrification by Thermal Analysis During Curing of an Epoxy–Amine System JF - Journal of Applied Polymer Science N2 - 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. Y1 - 2025 UR - https://doi.org/10.1002/app.57077 U6 - https://doi.org/10.1002/app.57077 VL - 142 IS - 26 SP - e57077 ER - TY - BOOK A1 - Hartmann, Jürgen T1 - Quantitative Bestimmung lokaler thermischer Eigenschaften in polykristallinem Diamant Y1 - 1996 PB - Köster CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Radiometrie im UV und IR BT - future led Seminar „UV-IRED LED Seminar“ Y1 - 2009 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Modernste Radiometrie und Photometrie BT - WTT Seminar „Beleuchtung mit LEDs“ Y1 - 2008 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Hollandt, Jörg T1 - Nearly as hot as the sun: High-temperature fixed-points for radiation thermometry and radiometry BT - NCSLI Symposium Metrology’s Impact on Products and Services Y1 - 2007 CY - St. Paul (USA) ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Photometrie und Radiometrie BT - 125 Jahre Lichttechnik an der TU Berlin Y1 - 2007 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Legal metrology on clinical thermometers in the European Union BT - Seminar der Japan Measuring Instruments Federation Y1 - 2004 CY - Tokyo (Japan) ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Radiation thermometry at PTB BT - Seminar der Japan Measuring Instruments Federation Y1 - 2004 CY - Tokyo (Japan) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Reichling, M. T1 - Complete Characterisation of local thermal heat transfer in high quality chemical vapour deposited diamond BT - 10th International conference on Photothermal and Photoacoustic Phenomena Y1 - 1998 CY - Rom (Italien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Reichling, M. T1 - Microscopic heat transfer in high quality polycrystalline diamond BT - EAA Symposium on Molecular and Quantum Acoustics Y1 - 1997 CY - Ustron (Polen) ER -