New insight into the thermal stability of the amorphous tetraphenyl-diamine (TPD) - A combined calorimetry/in-situ Raman microscopy study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F24%3A39922010" target="_blank" >RIV/00216275:25310/24:39922010 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0254058424010319?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0254058424010319?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchemphys.2024.129903" target="_blank" >10.1016/j.matchemphys.2024.129903</a>

Jazyk výsledku

angličtina

Název v původním jazyce

New insight into the thermal stability of the amorphous tetraphenyl-diamine (TPD) - A combined calorimetry/in-situ Raman microscopy study

Popis výsledku v původním jazyce

Non-isothermal differential scanning calorimetry (DSC) was used to study the influences of particle size d(aver) and heating rate q(+) on the crystal growth and decomposition kinetics of amorphous N,N&apos;-bis(3-methylphenyl)-N,N&apos;-bis(phenyl)-benzidine (TPD). The macroscopic crystallization kinetics was found to be strongly dependent on q(+). At high q(+), the crystal growth proceeded dominantly from the mechanical defects acting as primary growth centers, with the corresponding activation energy being similar to 70-80 kJ mol(-1). At low q(+), the crystalline phase was primarily formed from heterogeneous nuclei, with the activation energy for the growth process being similar to 980 kJ mol(-1). The prolonged nucleation led to extensive passivation of the surface mechanical defects with respect to their function as direct crystal-growth-accelerating centers. Temperature-resolved in-situ Raman microscopy has confirmed the conclusions derived from the DSC data and helped to identify the residual low-q(+) defects-originating crystal growth as proceeding from volume-located micro-cracks. The X-ray diffraction analysis confirmed that TPD crystallizes into an identical phase under all circumstances. The thermal decomposition of TPD was found to proceed in a single step, by simple nth-order reaction kinetics with the activation energy of similar to 120 kJ mol(-1).

Název v anglickém jazyce

New insight into the thermal stability of the amorphous tetraphenyl-diamine (TPD) - A combined calorimetry/in-situ Raman microscopy study

Popis výsledku anglicky

Non-isothermal differential scanning calorimetry (DSC) was used to study the influences of particle size d(aver) and heating rate q(+) on the crystal growth and decomposition kinetics of amorphous N,N&apos;-bis(3-methylphenyl)-N,N&apos;-bis(phenyl)-benzidine (TPD). The macroscopic crystallization kinetics was found to be strongly dependent on q(+). At high q(+), the crystal growth proceeded dominantly from the mechanical defects acting as primary growth centers, with the corresponding activation energy being similar to 70-80 kJ mol(-1). At low q(+), the crystalline phase was primarily formed from heterogeneous nuclei, with the activation energy for the growth process being similar to 980 kJ mol(-1). The prolonged nucleation led to extensive passivation of the surface mechanical defects with respect to their function as direct crystal-growth-accelerating centers. Temperature-resolved in-situ Raman microscopy has confirmed the conclusions derived from the DSC data and helped to identify the residual low-q(+) defects-originating crystal growth as proceeding from volume-located micro-cracks. The X-ray diffraction analysis confirmed that TPD crystallizes into an identical phase under all circumstances. The thermal decomposition of TPD was found to proceed in a single step, by simple nth-order reaction kinetics with the activation energy of similar to 120 kJ mol(-1).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Chemistry and Physics

ISSN

0254-0584

e-ISSN

1879-3312

Svazek periodika

327

Číslo periodika v rámci svazku

November 2024

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

14

Strana od-do

129903

Kód UT WoS článku

001316900300001

EID výsledku v databázi Scopus

2-s2.0-85202343852