TY - GEN
T1 - Isoconversion analysis of the glass transition
AU - Badrinarayanan, Prashanth
AU - Zheng, Wei
AU - Simon, Sindee L.
N1 - Funding Information:
The authors gratefully acknowledge funding from American Chemical Society Petroleum Research Fund (ACS-PRF) grant 39807-AC7 and from the National Science Foundation, grant DMR-0606500. The authors also acknowledge Prof. Sergey Vyazovkin for his significant input and for conversations, which simulated the initiation of this work.
PY - 2007
Y1 - 2007
N2 - Various aspects of the glass transition kinetics have been well described by phenomenological models of the glass transition, such as the TNM and KAHR model. An important assumption in these models is that the apparent activation energy, which describes the temperature dependence of the relaxation time, does not vary through the glass transition process. Some recent reports suggest that the activation energy decreases significantly from the glassy to the liquid state. In this work we apply an isoconversion analysis to data in the glass transition region which was obtained on cooling from capillary dilatometry and from differential scanning calorimetry (DSC) in order to determine whether the apparent activation energy changes through the glass transition.
AB - Various aspects of the glass transition kinetics have been well described by phenomenological models of the glass transition, such as the TNM and KAHR model. An important assumption in these models is that the apparent activation energy, which describes the temperature dependence of the relaxation time, does not vary through the glass transition process. Some recent reports suggest that the activation energy decreases significantly from the glassy to the liquid state. In this work we apply an isoconversion analysis to data in the glass transition region which was obtained on cooling from capillary dilatometry and from differential scanning calorimetry (DSC) in order to determine whether the apparent activation energy changes through the glass transition.
KW - Glass transition
KW - Isoconversion analysis
KW - Polystyrene
UR - http://www.scopus.com/inward/record.url?scp=34648840782&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:34648840782
SN - 1604232145
SN - 9781604232141
T3 - Annual Technical Conference - ANTEC, Conference Proceedings
SP - 1756
EP - 1760
BT - Society of Plastics Engineers Annual Technical Conference
T2 - Society of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007
Y2 - 6 May 2007 through 11 May 2007
ER -